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LM3886TF/NOPB - 68W Class-AB Audio Power Amplifier | TI
LM3886TF/NOPB

LM3886TF/NOPB - 68W Class-AB Audio Power Amplifier | TI

The Texas Instruments LM3886TF/NOPB is a high-performance 68W mono Class-AB audio power amplifier with mute, housed in an 11-pin TO-220 (NDA) isolated package. The device delivers 68W continuous average power into a 4 ohm load and 38W into 8 ohm with 0.1% THD+N across the 20 Hz to 20 kHz audio band, from a single supply of 20V to 94V. The TF suffix denotes a fully-isolated TO-220 leadform, while the NOPB suffix indicates lead-free / RoHS compliance. An audio power amplifier is the final analog stage that converts a low-level line-level input into a high-current, low-impedance signal capable of driving a loudspeaker. Class-AB topology blends the low conduction losses of Class-B with the low crossover distortion of Class-A, giving a compromise of efficiency and linearity that has dominated hi-fi amplifier design for decades. The LM3886 sits in the broader power management and amplifier IC hierarchy: audio amplifier -> Class-AB amplifier -> linear power amplifier -> analog output stage. Its self-peak instantaneous temperature (SPiKe) protection is a hallmark of the Overture series. Key specifications include 92 dB minimum open-loop gain, 0.03% typical THD+N at 1 kHz into 4 ohm, a slew rate of 19 V/us typical, and an operating temperature range of 0C to +70C. The mute function is logic-level controlled and the device includes internal current limiting and thermal shutdown. The fully-isolated TO-220 package permits direct mounting to a heatsink without an additional insulator pad, simplifying mechanical assembly. The bipolar output stage uses TI's SPiKe protection circuit, which provides dynamic, cycle-by-cycle current limiting as well as thermal shutdown. This yields a robust amplifier that tolerates output short circuits, reactive loads, and thermal overloads without destructive failure, making the LM3886 a long-standing favorite in DIY audiophile, subwoofer, and powered-monitor designs. Typical applications include powered subwoofers, home-theater amplifiers, professional powered monitors, guitar amplifiers, and high-fidelity integrated stereo amplifiers. The wide 20-94V supply range also makes it suitable for automotive 12V/24V bus and industrial audio systems when paired with a suitable boost converter. When designing with the LM3886, use a substantial heatsink rated for at least 40W continuous dissipation. Place the mute pull-down and 100k input resistors close to the IN+ pin to minimize noise pickup, and use 0.1 uF / 100 nF supply bypass capacitors within 1 cm of the V+ and V- pins. This page synthesizes distributor pricing, drop-in alternatives such as the LM3886T/NOPB and LM2876TF, and practical thermal design notes not found in the manufacturer datasheet itself, giving the engineer a single-page reference for sourcing and design.

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LM393AD - Dual Open-Collector Comparator | Texas Instruments
LM393AD

LM393AD - Dual Open-Collector Comparator | Texas Instruments

The Texas Instruments LM393AD is a dual differential comparator with two independent comparison channels, open-collector outputs, and an 8-pin SOIC package. According to the verified manufacturer and distributor listings, the device is intended for commercial-grade applications, supports a common-mode input voltage range that includes ground, and has a differential input voltage range equal to the maximum-rated supply voltage of plus or minus 38 V. Its open-collector outputs are compatible with TTL, MOS, and CMOS logic. The LM393 family provides a straightforward way to compare an analog input against a reference voltage without requiring a pull-up resistor internally. This architecture is especially useful in threshold detection, signal conditioning, industrial control, sensing, and power-supply monitoring systems. A comparator is an analog integrated circuit that determines whether an input voltage is above or below a reference level and then represents that decision through a logic output. In the product hierarchy, the LM393AD is a dual comparator, which is a type of analog comparator and therefore part of the broader comparator IC and interface IC categories. Unlike an operational amplifier configured as a comparator, this dedicated device provides predictable switching behavior for applications in which the input frequently crosses a threshold. Two channels in one package can monitor two signals or implement complementary decisions while reducing board area. The most important verified features are the dual-channel configuration, open-collector output topology, and wide differential input capability. Each output can sink current and requires an external pull-up resistor when a valid high output level is required. The listed compatibility with TTL, MOS, and CMOS outputs allows the device to interface with multiple logic families. Because the common-mode input range includes ground, the LM393AD is suitable for circuits whose signal or reference is near 0 V. The manufacturer identifies the family as a commercial-grade dual differential comparator, and the verified technical listing specifies an 8-SOIC package. Electrically, the LM393AD compares two input voltages at each channel and controls an open-collector output transistor. The output remains high impedance when the transistor is off, so the external pull-up network determines the high voltage. This architecture supports wired logic, relay drivers, lamp drivers, and level translation, provided that pull-up current and output sink current remain within the device limits. The maximum differential input voltage is stated as plus or minus 38 V, but that value is not a substitute for the specified operating supply range. Supply voltage, input offset voltage, response time, output sink current, and electrical limits must therefore be confirmed from the manufacturer datasheet before final design release. Typical applications include industrial sensor thresholds, battery and power-supply monitoring, overvoltage detection, temperature-control signals, window comparators, and logic interfaces requiring an open-collector output. The dual configuration is useful when two independently adjustable thresholds must be evaluated, such as upper and lower battery limits. In a two-threshold system, one channel can detect overvoltage while the other detects undervoltage, allowing a system controller to distinguish safe, low, and high operating states. A key design consideration is the external pull-up resistor. Its value determines output rise time, bus speed, and the current required when the output transistor is off. The pull-up should connect only to a voltage that the output and downstream logic can tolerate. The input network must also prevent either differential input from exceeding the plus or minus 38 V differential limit. Designers should verify the exact SOIC-8 pin mapping, supply range, common-mode limits, and output-current limits in the manufacturer datasheet before assembly because those details were not present in the supplied verified excerpts. This page consolidates the verified manufacturer and distributor information for the LM393AD, distinguishes its defining dual open-collector characteristics, documents the evidence gaps without inventing missing values, and identifies the verified STMicroelectronics drop-in alternative. It also adds practical design guidance for pull-up selection, threshold implementation, and cross-brand sourcing.

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LM393ADE4 - Dual 36V Open-Collector Comparator | TI
LM393ADE4

LM393ADE4 - Dual 36V Open-Collector Comparator | TI

The Texas Instruments LM393ADE4 is a dual, general-purpose voltage comparator with an open-collector output, operating from a single 2 V to 36 V supply or from dual supplies whose total span is within 2 V to 36 V. Each channel provides a common-mode input range that includes ground, and the open-collector outputs support wired-AND operation while remaining compatible with TTL, MOS, and CMOS logic. The device is packaged in an 8-SOIC. A comparator is an analog integrated circuit that evaluates two input voltages and switches its output according to their relationship. A general-purpose comparator belongs to the broader amplifier and comparator IC category, where it sits between simple logic gates and precision signal-conditioning channels. Unlike an operational amplifier, a comparator is designed for fast, saturated output transitions rather than linear amplification, making it suitable for threshold detection, level translation, and monitoring. The LM393 family provides two independent comparators in one 8-SOIC package. Its principal features include a 2 V to 36 V supply range, operation with a common-mode input range including ground, and open-collector outputs. These characteristics allow the device to monitor slow analog signals, supervise supply rails, interface to open-drain buses, or implement simple window-detection circuits using external resistor networks. Both comparator channels share the supply pins but otherwise operate independently. Their inputs can accept voltages extending below the positive supply rail, provided the differential input voltage remains within the rated supply span. Because each output is open collector, the output requires an external pull-up resistor, normally connected to the supply used by the receiving logic. Several comparator outputs can share one pull-up when wired-AND behavior is acceptable. Typical uses include industrial control and monitoring, overvoltage and undervoltage detection, temperature-condition signaling, battery threshold checking, and sensing interfaces that must operate from higher-voltage rails than ordinary 5 V CMOS logic. The wide supply range also allows the LM393ADE4 to operate from an 18 V industrial rail while its pull-up keeps the logic interface at a separate, lower voltage. When laying out the circuit, connect input sources so that absolute maximum differential and common-mode limits are respected, and place the output pull-up resistor close to the device or logic receiver. Avoid using the open-collector output to source current directly; the pull-up must provide the load current. Also verify compatibility between the unused output and its pull-up node before combining multiple channels. This page consolidates supply, package, pinout, drop-in comparison, and application guidance for engineers evaluating the LM393ADE4. It also highlights the practical differences among same-family and cross-brand SOIC-8 replacements, including where supply range, input common-mode limits, and output structure differ.

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LM393ADG4 - Dual Open-Collector Comparator, 2V-36V, 8-SOIC | Texas Instruments
LM393ADG4

LM393ADG4 - Dual Open-Collector Comparator, 2V-36V, 8-SOIC | Texas Instruments

The Texas Instruments LM393ADG4 is a dual differential comparator IC with two independent open-collector outputs, a 2 V to 36 V single-supply operating range (±1 V to ±18 V on split supplies), and a 0.3 µs response time, packaged in an 8-pin SOIC (0.154 in, 3.90 mm width). Each channel offers rail-to-rail input common-mode range that includes ground, and the outputs are compatible with TTL, CMOS, and MOS logic. A comparator is a differential analog input IC that reports whether one input voltage is above or below a reference voltage, producing a logic-level output rather than an analog amplified signal. Within the wider hierarchy, a comparator sits between simple logic gates and operational amplifiers: it belongs to the analog signal-chain family of integrated circuits, alongside amplifiers and voltage references, and is normally used inside the power-management and sensing portion of a system rather than in the digital datapath. Key features of the LM393ADG4 include two independent channels in one 8-SOIC package, an open-collector (open-drain) output stage that requires an external pull-up resistor, single-supply or dual-supply operation, and input common-mode operation down to ground so the device can monitor low-voltage signals referenced to 0 V without a negative rail. Because the output is open-collector, the output high level is set by the pull-up and the supply rail, which allows the part to be level-shifted to any compatible logic voltage and allows several open-collector outputs to be wired together. Internally the LM393 family uses a classic bipolar differential input stage with an open-collector output driver, and the A-grade device is characterized for general-purpose supply and input conditions. The datasheet lists supply voltages tested at 30 V for non-V devices and 32 V for V-suffix devices, giving adequate margin above the nominal 36 V absolute maximum supply rating. Typical applications include window comparators for overvoltage and undervoltage protection, zero-cross and threshold detection for signal conditioning, relay or solenoid drive stages, sensor interface front ends for thermistors and light sensors, and battery monitoring in portable equipment. The open-collector output also makes the device suitable for driving indicator LEDs or optocouplers directly with a series current-limiting resistor. When designing with the LM393ADG4, remember that the open-collector output cannot source current: every output needs a pull-up resistor, typically between 1 kΩ and 10 kΩ, and the pull-up supply defines the logic high level. Keep the input common-mode voltage within the rated range and place the pull-up resistor close to the output to keep rise times short when driving capacitive loads.

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LM393ADR - Dual Open-Collector Comparator | Texas Instruments (Tape & Reel)
LM393ADR

LM393ADR - Dual Open-Collector Comparator | Texas Instruments (Tape & Reel)

The Texas Instruments LM393ADR is a dual differential comparator with two independent comparison channels, open-collector outputs, and an 8-pin SOIC package. According to the verified manufacturer and distributor listings, the device is intended for commercial-grade applications, supports a common-mode input voltage range that includes ground, and has a differential input voltage range equal to the maximum-rated supply voltage of plus or minus 38 V. Its open-collector outputs are compatible with TTL, MOS, and CMOS logic. The LM393 family provides a straightforward way to compare an analog input against a reference voltage without requiring a pull-up resistor internally. This architecture is especially useful in threshold detection, signal conditioning, industrial control, sensing, and power-supply monitoring systems. A comparator is an analog integrated circuit that determines whether an input voltage is above or below a reference level and then represents that decision through a logic output. In the product hierarchy, the LM393ADR is a dual comparator, which is a type of analog comparator and therefore part of the broader comparator IC and interface IC categories. Unlike an operational amplifier configured as a comparator, this dedicated device provides predictable switching behavior for applications in which the input frequently crosses a threshold. Two channels in one package can monitor two signals or implement complementary decisions while reducing board area. The most important verified features are the dual-channel configuration, open-collector output topology, and wide differential input capability. Each output can sink current and requires an external pull-up resistor when a valid high output level is required. The listed compatibility with TTL, MOS, and CMOS outputs allows the device to interface with multiple logic families. Because the common-mode input range includes ground, the LM393ADR is suitable for circuits whose signal or reference is near 0 V. The manufacturer identifies the family as a commercial-grade dual differential comparator, and the verified technical listing specifies an 8-SOIC package. Electrically, the LM393ADR compares two input voltages at each channel and controls an open-collector output transistor. The output remains high impedance when the transistor is off, so the external pull-up network determines the high voltage. This architecture supports wired logic, relay drivers, lamp drivers, and level translation, provided that pull-up current and output sink current remain within the device limits. The maximum differential input voltage is stated as plus or minus 38 V, but that value is not a substitute for the specified operating supply range. Supply voltage, input offset voltage, response time, output sink current, and electrical limits must therefore be confirmed from the manufacturer datasheet before final design release. Typical applications include industrial sensor thresholds, battery and power-supply monitoring, overvoltage detection, temperature-control signals, window comparators, and logic interfaces requiring an open-collector output. The dual configuration is useful when two independently adjustable thresholds must be evaluated, such as upper and lower battery limits. In a two-threshold system, one channel can detect overvoltage while the other detects undervoltage, allowing a system controller to distinguish safe, low, and high operating states. A key design consideration is the external pull-up resistor. Its value determines output rise time, bus speed, and the current required when the output transistor is off. The pull-up should connect only to a voltage that the output and downstream logic can tolerate. The input network must also prevent either differential input from exceeding the plus or minus 38 V differential limit. Designers should verify the exact SOIC-8 pin mapping, supply range, common-mode limits, and output-current limits in the manufacturer datasheet before assembly because those details were not present in the supplied verified excerpts. This page consolidates the verified manufacturer and distributor information for the LM393ADR, distinguishes its defining dual open-collector characteristics, documents the evidence gaps without inventing missing values, and identifies the verified STMicroelectronics drop-in alternative. It also adds practical design guidance for pull-up selection, threshold implementation, and cross-brand sourcing.

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LM393ADRE4 - Dual 36V Open-Collector Comparator | Texas Instruments
LM393ADRE4

LM393ADRE4 - Dual 36V Open-Collector Comparator | Texas Instruments

The Texas Instruments LM393ADRE4 is a dual differential analog comparator with an open-collector output, a 300 ns response time, and operation from 2 V to 36 V, housed in an 8-pin SOIC package. It contains two independent comparator channels, and each channel supports rail-to-rail input comparison while driving external pull-up circuitry through an open-collector transistor. A comparator is an analog integrated circuit that evaluates two voltages and produces a digital logic state indicating which input is higher. The LM393A belongs to the broader comparator hierarchy within analog and mixed-signal semiconductors. Its open-collector architecture makes it particularly useful when a circuit needs a wired logic function, level translation, system reset, or an externally defined pull-up voltage rather than a fixed active push-pull output. The principal features of the LM393ADRE4 are its dual-channel configuration, wide 2 V to 36 V operating range, rail-to-rail input capability, and open-collector outputs. The 300 ns propagation delay makes it suitable for general-purpose threshold detection, signal conditioning, and monitoring functions. The 8-SOIC body is specified at 0.154 inch, or 3.90 mm, width, supporting conventional surface-mount PCB assembly and existing SOIC-8 layouts. Each channel compares a non-inverting input against an inverting input. The output transistor is pulled low when the non-inverting input is higher than the inverting input and releases to a high impedance when the opposite condition applies. Because the output is open collector, the output high voltage is not internally fixed; it is established by an external pull-up resistor and the available supply. This feature allows several open-collector outputs to share a bus, but it also requires correct pull-up selection and compatible system levels. Typical uses include overvoltage and undervoltage monitoring, battery threshold detection, sensor signal conditioning, window comparison, relay or LED drive, and general logic interfacing. The wide supply range is useful in industrial control systems where the comparator may operate from a rail substantially higher than a 5 V logic system. When dual supplies are used, the total supply difference must remain within the device operating limits. PCB implementation should follow the manufacturer pinout and place the comparator input and output tracks away from switching nodes and high-current paths. Keep the open-collector pull-up resistor close to the output node to limit rise time and susceptibility to capacitive coupling. Confirm input common-mode limits, output pull-up voltage, and logic-family compatibility before replacing a device in an existing design. This page consolidates the LM393ADRE4 ordering information, technical characteristics, replacement guidance, and application-focused design considerations into one engineering reference. It also distinguishes genuine same-footprint replacements from options that require package, voltage, or logic-architecture changes, helping designers select a compatible device without relying on package naming alone.

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LM393ADRG4 - Dual Open-Collector Comparator | Texas Instruments
LM393ADRG4

LM393ADRG4 - Dual Open-Collector Comparator | Texas Instruments

The Texas Instruments LM393ADRG4 is a dual differential comparator containing two independent general-purpose comparator channels, a 2 mV input offset voltage, a 300 ns response time, and a 2 V to 36 V supply range in an 8-pin SOIC (D) package. Each channel supports single-supply or dual-supply operation, and its open-collector output architecture is intended for wired logic, alarm, threshold, and industrial control circuits. A comparator is an analog integrated circuit that evaluates one voltage against another and changes its output state when the difference crosses a defined threshold. The LM393 family belongs to the broader hierarchy of differential comparator, analog comparator, signal-conditioning IC, and semiconductor categories. Unlike an operational amplifier used primarily for closed-loop amplification, a comparator is optimized for fast, decisive digital signaling and commonly interfaces analog sensing circuits with logic-level systems. Key features include two independent channels, a wide 2 V to 36 V operating range, open-collector outputs, and a 2 mV offset specification that helps distinguish small differential signals. The open-collector architecture permits the output to be pulled up to a suitable logic voltage, adds output-stage flexibility, and can support wired-AND behavior when multiple comparator outputs share a pull-up resistor. The listed response time of 300 ns suits applications that require a defined switching transition without using a very high-speed logic device. The LM393ADRG4 is identified as an industrial-grade precision dual differential comparator. Its SOIC package provides a practical surface-mount footprint for PCB assembly, while the broad supply range accommodates 5 V, 12 V, 15 V, and 24 V system rails when component voltage ratings are considered. Because the outputs are open collectors, every application must include an appropriate pull-up resistor or other pull-up arrangement to obtain a valid high output level. Typical applications include overvoltage and undervoltage monitoring, sensor threshold detection, industrial control interfaces, motor or actuator protection, window-comparison functions, and conversion of analog sensor conditions into logic-compatible events. The two independent channels can monitor separate thresholds or operate as complementary comparators. Designers should also account for input common-mode limits, output pull-up voltage, supply decoupling, and any pull-up current when fan-out or fault conditions are important. For reliable layouts, place the bypass capacitor close to the supply and ground pins, keep comparator input traces short, and avoid routing them beside high-current switching paths. A pull-up resistor near the output improves rise time, but its value must balance speed, power, and the current sourced by the open-collector transistor. The input network should use stable reference sources and include protection when external wiring exposes the pins to transients. This page combines the manufacturer product identity, exact orderable package information, structured technical specifications, supported use cases, and drop-in replacement analysis. It is designed to help engineers confirm electrical suitability, package compatibility, and application fit before integrating the LM393ADRG4 into a new or existing PCB design.

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LM393AM - Dual 36V Differential Comparator | onsemi | SOIC-8
LM393AM

LM393AM - Dual 36V Differential Comparator | onsemi | SOIC-8

The onsemi LM393AM is a dual differential comparator with open-collector outputs, designed for general-purpose signal comparison in an 8-pin SOIC package. It supports single-supply operation to 36 V and dual-supply operation to ±18 V. Each channel compares two input voltages and provides a low-voltage open-collector output suitable for pulling a logic node low. The device also offers low input bias current of 25 nA typical and low current drain of 800 µA typical. A differential comparator is an integrated circuit that evaluates the relationship between two voltages and translates the result into a logic-level output. The LM393 belongs to the comparator hierarchy within analog and mixed-signal semiconductors, where it sits alongside amplifiers, voltage references, logic interfaces, and other power-management functions. Its open-collector architecture is particularly useful when a designer needs to combine outputs, control a wired bus, or interface to legacy TTL and CMOS logic. The LM393AM provides two independent comparator channels in one package. Operation from a single supply allows the common-mode input range to approach ground, making the part useful for battery-powered monitoring, sensor conditioning, window comparison, and supply-control circuits. An open-collector output requires an external pull-up resistor because the output transistor actively pulls the output toward ground but does.source current from the output. This feature permits wired logic operation when several outputs share a bus and allows the output polarity to be changed by assigning the pull-up to either the positive or negative supply. The principal engineering trade-off is low power consumption versus modern performance. The 800 µA typical current drain suits battery-operated equipment, while the 25 nA typical input bias current helps preserve accuracy with high-impedance sensing networks. Because the output is open collector, designers must verify pull-up resistance, pull-up voltage, rise time, output sink current, and system-level timing rather than treating the part like a push-pull logic gate. Typical applications include overvoltage and undervoltage protection, battery monitoring, thermistor and light sensor interfaces, motor or actuator threshold detection, industrial control modules, and embedded logic. In each case, the LM393AM converts a small analog differential into a digital decision. The commercial-temperature LM393AM should be selected where its specified temperature range, supply limits, offset behavior, and propagation delay satisfy the design. For PCB implementation, place the decoupling capacitor close to the supply and ground pins, keep input traces short, and provide adequate copper for heat dissipation. The open-collector output node can be sensitive to capacitive loading and leakage, so external pull-up placement and grounding require careful review. This page combines verified source data, package-level alternatives, parameter comparisons, and application guidance to support practical component selection without relying on the datasheet alone.

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LM393AN - Dual Comparator for 5V Control | STMicroelectronics
LM393AN

LM393AN - Dual Comparator for 5V Control | STMicroelectronics

The STMicroelectronics LM393AN is a dual, independent, general-purpose voltage comparator with open-collector outputs, packaged in an 8-DIP. It supports single-supply or split-supply operation and is intended for comparison tasks where a low-side, open-drain signaling output is useful. The verified source identifies the device as rail-to-rail and suitable for common-mode input ranges extending toward ground on a single supply. A voltage comparator is an analog integrated circuit that compares two input voltages and changes its output state when one input crosses the other. The LM393AN contains two independent comparator channels in one package. Within the broader semiconductor hierarchy, it is a comparator IC, an analog interface device, and part of the integrated-circuit family used for sensing, control, protection, and digital threshold conversion. The principal feature is its open-collector output architecture, allowing each channel to interface with pull-up resistors and external loads. This architecture is useful in open-drain buses, wired logic, relay-driver stages, and systems where multiple comparators can share a signaling line under suitable conditions. Because the supplied results do not provide complete numerical electrical tables, exact supply voltage, input offset, response time, and current limits require confirmation from the manufacturer datasheet. The LM393AN is a bipolar general-purpose comparator rather than a rail-to-rail input comparator in the modern CMOS sense, although the distributor listing describes the device as rail-to-rail. Its two channels are electrically independent, allowing one section to monitor a supply threshold while the other evaluates a signal or temperature-derived voltage. The open-collector outputs require external pull-up components when a logic-high output is required. Typical applications include industrial overvoltage and undervoltage monitoring, sensor threshold detection, battery and power-supply supervision, open-drain interface translation, and control systems comparing an analog input with an adjustable reference. For battery-powered designs, engineers should review the device's supply-current specifications because a classic general-purpose comparator may consume more current than a modern low-power equivalent. Designers should place the input and output components close to the package pins, use an appropriate pull-up resistor on each open-collector output, and verify the common-mode and supply limits for the selected manufacturer. Input polarity, output sinking current, and propagation delay must be checked before substituting another manufacturer's LM393AN or an LM393-family device. This page consolidates verified manufacturer and distributor information, identifies source-backed drop-in sourcing options, and adds engineering-focused comparison and application guidance. It is intended to support part selection while clearly separating confirmed package and architecture details from electrical parameters that require the manufacturer datasheet.

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LM393AP - Dual 36V Open-Collector Comparator | Texas Instruments
LM393AP

LM393AP - Dual 36V Open-Collector Comparator | Texas Instruments

The Texas Instruments LM393AP is a dual differential comparator with two independent comparator channels, a 2 V to 36 V single-supply operating range, and a 300 ns response time in an 8-pin PDIP package. Each channel provides an open-collector output that can sink useful load current and operate at voltages up to 36 V. The device is intended for general-purpose commercial applications requiring threshold detection, signal conditioning, or simple analog decision-making. A differential comparator is an analog IC that compares two input voltages and changes its output state when the difference crosses a defined threshold. The LM393AP belongs to the comparator hierarchy, where a comparator is a specialized amplifier IC used for voltage-level detection rather than linear signal amplification. Its two independent channels allow one package to implement two separate sensing or control functions. Key characteristics include a wide 2 V to 36 V supply range, a differential input arrangement, an open-collector output, and a response time of 300 ns. The open-collector architecture requires an external pull-up resistor, but it provides useful flexibility because the output can be pulled to a system-defined voltage and the device can remain off during output high states. The input offset voltage can reach ±5 mV according to the published LM393 comparator information. The architecture is suited to low- and moderate-speed threshold decisions. Its propagation delay is long compared with a high-speed logic comparator, but it is appropriate for monitoring, sorting, control, and protection functions that do not require sub-microsecond response. The differential inputs support sensing above or below a reference voltage, while the two channels can share a supply but operate independently. Typical uses include battery monitoring, overvoltage detection, sensor signal conditioning, window comparison, temperature-control thresholds, and industrial control interfaces. In battery systems, the broad operating supply range allows the comparator to monitor divided supply voltages without requiring a low-voltage-only comparator. When designing a PCB around the LM393AP, place input and pull-up components close to the device and keep sensitive comparator inputs away from switching nodes. Because the output is open collector, never leave an output undefined; fit the appropriate pull-up resistor to a compatible logic or supply rail. Verify differential input limits, output current, and common-mode range against the application’s worst-case voltage conditions. This page combines device specifications, application guidance, same-package drop-in options, and a parameter-by-parameter comparison to support schematic review, PCB planning, and sourcing decisions.

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LM393APG4 - Dual Open-Collector Comparator, 8-PDIP | Texas Instruments
LM393APG4

LM393APG4 - Dual Open-Collector Comparator, 8-PDIP | Texas Instruments

The Texas Instruments LM393APG4 is a dual differential comparator consisting of two independent voltage comparators in an 8-pin PDIP (0.300 inch, 7.62 mm) through-hole package with open-collector, open-emitter outputs and a common supply range of 2 V to 36 V. A comparator is a differential amplifier whose output switches state whenever the voltage applied to its inverting input rises above or falls below the voltage on its non-inverting input. As a product type, the LM393 family sits in the hierarchy comparator -> differential comparator -> analog signal conditioning IC -> integrated circuit, and it is one of the most widely cloned analog building blocks in the industry. Because the output stage is open collector, the output node can pull only to a logic-low rail, which makes the part directly usable with pull-up resistors to any supply between 2 V and 36 V, including 3.3 V, 5 V and 24 V system levels. Key features of the LM393APG4 include two independent comparator channels that can operate from a single supply or from split dual supplies, rail-to-rail input common-mode range as highlighted in distributor listings, and an open-collector output stage that supports wired-AND busing and level translation. The device is specified as a standard, general-purpose comparator, and the same die is offered in multiple package and temperature options under the LM393 and LM393A orderable part numbers. Architecturally, each channel in the LM393 uses a differential input pair feeding an open-collector output stage, so the outputs are naturally slow but noise-tolerant; the design is intended for sensing thresholds rather than for high-speed signal conditioning. Because the output transistor is not driven above the low state, a pull-up resistor is mandatory, and any change in pull-up supply changes the output high level without affecting the input stage. Typical applications include over-voltage and under-voltage protection in switching power supplies, window comparators for battery monitoring, temperature threshold detection with external sensors, zero-cross detection in AC line circuits, relay and solenoid drive, and general level translation between dissimilar logic families. Industrial control and instrumentation designs use the open-collector outputs to drive optocouplers, transistors, or LED indicators directly. When designing around the LM393APG4, always place the pull-up resistor as close as practical to the output pin to limit stray capacitance-induced switching spikes, and note that the two channels share a common ground and a common supply pin. Because the output is open collector, the device cannot source current; any load must be referenced to the same ground as the device. This page combines manufacturer specification details, package and pin-level guidance, drop-in replacement options, and practical design notes so that engineers can evaluate the LM393APG4 alongside modern low-power alternatives without re-reading multiple documents.

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LM393APWRE4 - Dual Open-Collector Comparator | Texas Instruments
LM393APWRE4

LM393APWRE4 - Dual Open-Collector Comparator | Texas Instruments

Texas Instruments LM393APWRE4 is a dual general-purpose differential comparator with open-collector outputs, a 30 V maximum supply rating, and 0.3 us response time in an 8-TSSOP package. The device contains two independent comparator channels and can operate from either a single supply or split supplies. Its open-collector outputs require an external pull-up resistor and can be wired for wired-AND operation. A comparator is an analog integrated circuit that evaluates one input voltage against another and changes its output state when the difference crosses a defined threshold. The LM393 belongs to the comparator hierarchy within analog and mixed-signal semiconductors. Unlike an operational amplifier used primarily for closed-loop amplification, this device provides a saturated digital decision at its output. Each channel can also be used as an open-loop line receiver or simple threshold detector. Key features include two independent channels, an open-collector output architecture, a supply voltage range extending to 30 V, and a typical propagation delay of 0.3 us. The listed supply-current drain is 0.4 mA typical per comparator, making the device suitable for battery-powered monitoring systems where continuous current matters. The differential inputs allow a signal to be compared against a reference voltage, while the package reduces board area compared with discrete transistor implementations. The LM393 family uses open-collector transistor outputs rather than totem-pole outputs. When the output transistor turns off, the output node rises only as allowed by the external pull-up network. This architecture provides a useful advantage in systems that need a shared bus, wired logic, level translation, or compatibility with a higher supply domain. The output transistor can sink current from the pull-up rail while the collector remains physically isolated from the device supply pins. Typical uses include DC overvoltage and undervoltage detection, sensor threshold conditioning, window comparators, battery monitoring, zero-cross detection, and industrial control interfaces. Two independent channels can implement separate upper and lower thresholds, or they can be combined into a window-comparator function. Open-collector outputs also permit several comparator outputs to share a pull-up when the system requires a wired-AND arrangement. When designing a circuit, choose the pull-up resistor so that its worst-case sink current stays within the output-transistor limit and its rise time remains acceptable for the downstream logic. Keep input traces short, provide a stable reference source, and connect the unused comparator channel to a defined common-mode voltage. The 8-TSSOP package requires careful lead inspection because its closely spaced leads can be difficult to inspect after soldering. This product page combines the device specifications, application guidance, drop-in alternatives, and practical comparator-layout considerations. These engineering details help designers evaluate the LM393APWRE4 against other dual open-collector comparators without treating package size and pin compatibility as substitutes for complete electrical verification.

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LM393D - Dual Differential Comparator, 36V, Open-Collector SOIC-8 | Texas Instruments (Tape & Reel)
LM393D

LM393D - Dual Differential Comparator, 36V, Open-Collector SOIC-8 | Texas Instruments (Tape & Reel)

The Texas Instruments LM393D is a dual differential comparator integrating two independent precision comparators on a single monolithic die, housed in an 8-pin SOIC surface-mount package with the industry-standard LM393 pinout. The device operates from a single supply of 2V to 36V or from split dual supplies of plus/minus 1V to plus/minus 18V, and features an open-collector output stage that supports rail-to-rail output swing through an external pull-up resistor. A comparator is an analog building block that compares two input voltages and drives its output to indicate which is greater. Within the component taxonomy, the LM393 belongs to the general-purpose voltage comparator family, sitting as a faster-switching cousin of the operational amplifier optimized for saturated logic-level output rather than linear amplification. It belongs to the signal-conditioning and power-management hierarchy, alongside op-amps, voltage references, and supervisors. Key features include a quiescent supply current of approximately 0.4 mA per comparator that is largely independent of supply voltage, a typical input offset voltage of 1 mV (improved to 0.37 mV on the LM393B revision), and a wide common-mode input range that includes ground (V-), enabling true single-supply ground-sensing. The open-collector output structure allows wired-OR logic and direct interfacing to TTL, CMOS, or any logic family by tying the pull-up to that family's supply rail up to 36V, independent of the comparator's own VCC. The LM393D is built on TI's mature junction-isolated bipolar process with a PNP input stage that gives it the low-input-bias-current robustness expected of a decades-old industry workhorse. Multiple second-source manufacturers including ROHM Semiconductor, STMicroelectronics, ON Semiconductor, and Diodes Incorporated produce pin-compatible LM393D variants, providing true multi-source resilience. The improved LM393B/2903B silicon offers drop-in compatibility with better DC precision and 1 microsecond response time. Typical applications include voltage-level detection, zero-crossing detectors, relaxation oscillators, window comparators, battery undervoltage/overvoltage monitors, and limit comparators in industrial, automotive, and consumer systems. It is also a staple in switched-mode power supply feedback, sensor threshold detection, and as a building block in PWM and 555-style timer circuits. Design consideration: every open-collector output requires a pull-up resistor (typically 1 kOhm to 100 kOhm). Add a few millivolts of positive-feedback hysteresis to prevent output chattering when the input signal transitions slowly through the threshold.

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LM393DE4 - Dual Open-Collector Comparator | Texas Instruments
LM393DE4

LM393DE4 - Dual Open-Collector Comparator | Texas Instruments

Texas Instruments LM393DE4 is a dual differential analog comparator with two independent comparison channels, a supply voltage range of 2 V to 36 V, and an open-collector output. The device is packaged in an 8-pin SOIC and is intended for commercial-grade applications. Each channel can operate from a single supply or dual supplies, while the low typical supply-current drain is 0.4 mA per comparator. A comparator is an analog semiconductor that evaluates two input voltages and produces a digital logic state indicating which input is higher. The LM393 belongs to the comparator hierarchy, where differential comparator forms part of interface ICs and broader signal-conditioning semiconductors. Unlike an op amp, the LM393 does not provide a push-pull output; each output uses an open collector, allowing the output node to be pulled up externally to a chosen logic voltage. This architecture is useful for wired-interface, threshold-detection, and open-collector signaling circuits. The two channels are designed to compare differential inputs against common-mode and output limits defined by the manufacturer datasheet. Key characteristics include a 300 ns response-time figure, a 2 V to 36 V supply range, and operation from either single or dual supplies. The open-collector outputs can sink external current through a pull-up resistor, but their rise time depends on the pull-up resistance, total node capacitance, and the next-stage input characteristics. The LM393DE4 is offered in the standard 8-SOIC package identified by the DigiKey listing as 8-SOIC, measuring 0.154 inches, or 3.90 mm, in body width. Commercial-grade temperature coverage is associated with the LM393 family. Because this is a general-purpose comparator rather than a precision rail-to-rail comparator, the input offset, input bias current, common-mode range, output timing, and output-current limits should be checked against the application before production release. Typical applications include detecting whether a sensor signal has crossed a threshold, monitoring battery or power-supply rails, translating industrial sensor states to logic levels, and supporting open-collector alarm or fault signaling. Two independent channels can monitor two related voltages, or both halves of the IC can serve unrelated functions when that improves layout efficiency and inventory consolidation. Design the output pull-up network carefully because the open collector does not actively source current. Place the pull-up resistor near the driven node, confirm that its voltage is within the next device's input limits, and evaluate its value against output rise time and power dissipation. Check the input common-mode range at the actual supply voltage, and allow sufficient spacing from the comparator switching threshold to prevent noise from causing repeated output transitions. This page combines the LM393DE4 electrical characteristics, pin assignment, drop-in alternatives, application guidance, and design checks to support component selection and PCB implementation. The comparison section highlights practical differences among electrically similar dual open-collector comparators, while the design notes focus on pull-up selection, supply-noise behavior, and robust threshold implementation.

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LM393DG - Dual Precision Comparator | onsemi | SOIC-8
LM393DG

LM393DG - Dual Precision Comparator | onsemi | SOIC-8

onsemi LM393DG is a dual independent precision voltage comparator with open-collector outputs, a 2 V to 36 V supply range, and 1.3 µs response time in an 8-pin SOIC package. The two comparator channels support single or split supply operation, while the common-mode input range extends to ground under single-supply conditions. A voltage comparator is an analog integrated circuit that compares two input voltages and changes its output state when the difference crosses a defined threshold. In the broader semiconductor hierarchy, a comparator belongs to the amplifier and signal-conditioning IC family, where it connects analog sensing functions to digital control, protection, and switching systems. The LM393DG combines two independent comparators in one package, reducing component count and simplifying dual-threshold or dual-channel designs. Key features include input offset voltage as low as 2.0 mV, single or split supply operation, and output compatibility with CMOS, DTL, ECL, MOS, and TTL logic families. Its open-collector outputs allow wired logic, level translation, or operation with an external pull-up resistor. A 1.3 µs response time supports applications where the comparator must resolve changing input conditions without the delay of a slower monitoring device. The LM393 series is designed for consumer, automotive, and industrial electronics, including threshold detection, sensor conditioning, window comparison, overvoltage indication, and relay or power-control interfaces. Each channel can operate from a single positive supply or from split supplies when the required input and output reference conditions permit it. Independent channels also allow different thresholds and switching functions within one package. Common-mode range to ground makes the device useful with low-voltage sensors whose signals remain near the lower supply rail. The output stage is open collector rather than push-pull, so every output requires a pull-up resistor unless it is intentionally wired together. Confirm the pull-up voltage, output sink-current requirements, input common-mode limits, and system grounding before finalizing a design. For robust layouts, keep input traces short, place bypass capacitance close to the supply pin, and isolate high-current switching nodes from comparator inputs. The SOIC-8 footprint simplifies through-hole assembly and PCB prototyping, while the open-collector outputs require careful pull-up placement to minimize switching noise and propagation delay. This page combines the LM393DG electrical characteristics, lifecycle status, drop-in replacement options, pinout, comparison data, and practical circuit guidance to support component selection and board-level implementation. It also identifies the operating parameters and sourcing facts that should be checked against the manufacturer datasheet before production release.

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LM393DG4 - Dual Open-Collector Comparator | Texas Instruments
LM393DG4

LM393DG4 - Dual Open-Collector Comparator | Texas Instruments

The Texas Instruments LM393DG4 is a dual differential comparator in an 8-pin SOIC package, designed for commercial-grade applications with open-collector outputs. It supports single-supply or dual-supply operation across a 2 V to 36 V supply range, with a listed maximum operating voltage of 30 V for the non-V device and 32 V for V-suffix devices. The device provides two independent comparator channels, low supply-current drain, and short-circuit-protected outputs. A comparator is an analog signal-processing IC that compares two input voltages and produces a logic-level indication of their relationship. The LM393 belongs to the comparator hierarchy: differential comparator, analog comparator, interface IC, and general-purpose semiconductor. It is commonly used in threshold detection, sensor conditioning, window comparisons, and simple control systems where an open-collector output can drive a pull-up network. Each LM393 channel has two differential inputs, a common supply ground, and an open-collector output. The open-collector architecture allows outputs to be pulled up to a chosen logic voltage and permits wired-AND behavior when multiple comparator outputs share a pull-up node. The low supply-current drain is listed as 0.4 mA typical per comparator, helping reduce system power in applications that do not require continuous high-current output drive. The LM393 is specified for propagation delay around 0.3 microseconds in distributor product information, making it suitable for general-purpose decision logic rather than high-speed timing applications. The device supports single supply or dual supplies, allowing a 5 V system to compare signals referenced to ground or an analog circuit to use split supplies. Input common-mode and output behavior should be checked against the manufacturer datasheet when operating near supply limits. Typical uses include battery-powered threshold monitors, industrial sensor interfaces, overvoltage and undervoltage detection, window comparators, and control inputs for motors or relays. Because the output is open collector, an external pull-up resistor is required to establish a valid high level. The pull-up value controls rise time, power consumption, and compatibility with the following logic family. For PCB design, place decoupling capacitors close to the supply pins and route comparator inputs away from switching nodes and high-current return paths. Keep the input network compact and use a solid ground reference, especially when the comparator detects small signal changes. Check input common-mode range, output sink current, supply limits, and thermal conditions in the manufacturer datasheet before finalizing the circuit. This page summarizes the LM393DG4 function, electrical envelope, applications, pinout status, and drop-in alternatives for engineers evaluating a robust open-collector dual comparator.

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LM393DMR2G - Dual Open-Collector Comparator | onsemi
LM393DMR2G

LM393DMR2G - Dual Open-Collector Comparator | onsemi

The onsemi LM393DMR2G is a dual, independent precision voltage comparator in an 8-MSOP package. Each channel supports single or split-supply operation, uses an open-collector output, and provides a rail-to-rail input common-mode range. The device operates across a 2 V to 36 V supply range and offers input offset voltage as low as 2.0 mV. A voltage comparator is an analog integrated circuit that compares two input voltages and changes its output state when one input exceeds the other. The LM393 belongs to the comparator hierarchy within analog interface and signal-conditioning ICs. Its two independent channels can compare sensor outputs, control thresholds, supervise analog signals, or translate small voltage differences into logic-level events. Open-collector outputs allow the two channels to share a pull-up resistor when wired-OR operation is useful. The principal features include two independent comparator channels, an open-collector output stage, rail-to-rail common-mode input capability, and operation from 2 V to 36 V. The low input offset voltage helps establish decision thresholds accurately when the compared signals differ only by a few millivolts. Its wide supply range also permits use in both low-voltage embedded systems and higher-voltage industrial control environments when the input and output levels are constrained appropriately. The LM393DMR2G is identified as an active part and is packaged in the compact 8-MSOP format. The suffix R2G identifies the onsemi ordering configuration. Its open-collector outputs require external pull-up resistors to establish a high output level. Because the output transistor can sink current but cannot actively source a high-level voltage, output rise time depends on the pull-up resistance and total output capacitance rather than on the comparator alone. Typical applications include battery threshold detection, industrial sensor interfaces, overvoltage and undervoltage protection, window comparators for two-sided limits, and logic-level translation using an external pull-up. In a two-threshold circuit, one channel can compare an input against an upper reference while the other compares it against a lower reference, allowing an external logic function to identify whether the signal is inside or outside the permitted range. Designers should choose pull-up resistor values carefully, account for the open-collector output's rise and fall behavior, and verify input common-mode limits at every supply voltage. Because the comparator is not a rail-to-rail output device, the pull-up supply defines the high output level and must match the receiving logic system. Decoupling capacitors should be placed close to the supply and ground pins to limit supply disturbance caused by output switching. This product page combines the exact LM393DMR2G electrical identity, package information, lifecycle and compliance attributes, verified sourcing URLs, pin assignments, application engineering guidance, and a strict assessment of drop-in replacement availability. The replacement assessment distinguishes electrically similar LM393 devices from substitutes that require a different physical footprint.

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LM393DR - Dual Differential Comparator, 36V, Open-Collector SOIC-8 | Texas Instruments
LM393DR

LM393DR - Dual Differential Comparator, 36V, Open-Collector SOIC-8 | Texas Instruments

The Texas Instruments LM393DR is a dual differential comparator integrating two independent precision comparators on a single monolithic die, housed in an 8-pin SOIC surface-mount package with the industry-standard LM393 pinout. The device operates from a single supply of 2V to 36V or from split dual supplies of plus/minus 1V to plus/minus 18V, and features an open-collector output stage that supports rail-to-rail output swing through an external pull-up resistor. A comparator is an analog building block that compares two input voltages and drives its output to indicate which is greater. Within the component taxonomy, the LM393 belongs to the general-purpose voltage comparator family, sitting as a faster-switching cousin of the operational amplifier optimized for saturated logic-level output rather than linear amplification. It belongs to the signal-conditioning and power-management hierarchy, alongside op-amps, voltage references, and supervisors. Key features include a quiescent supply current of approximately 0.4 mA per comparator that is largely independent of supply voltage, a typical input offset voltage of 1 mV (improved to 0.37 mV on the LM393B revision), and a wide common-mode input range that includes ground (V-), enabling true single-supply ground-sensing. The open-collector output structure allows wired-OR logic and direct interfacing to TTL, CMOS, or any logic family by tying the pull-up to that family's supply rail up to 36V, independent of the comparator's own VCC. The LM393DR is built on TI's mature junction-isolated bipolar process with a PNP input stage that gives it the low-input-bias-current robustness expected of a decades-old industry workhorse. Multiple second-source manufacturers including ROHM Semiconductor, STMicroelectronics, ON Semiconductor, and Diodes Incorporated produce pin-compatible LM393DR variants, providing true multi-source resilience. The improved LM393B/2903B silicon offers drop-in compatibility with better DC precision and 1 microsecond response time. Typical applications include voltage-level detection, zero-crossing detectors, relaxation oscillators, window comparators, battery undervoltage/overvoltage monitors, and limit comparators in industrial, automotive, and consumer systems. It is also a staple in switched-mode power supply feedback, sensor threshold detection, and as a building block in PWM and 555-style timer circuits. Design consideration: every open-collector output requires a pull-up resistor (typically 1 kOhm to 100 kOhm). Add a few millivolts of positive-feedback hysteresis to prevent output chattering when the input signal transitions slowly through the threshold.

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LM393DR2 - Dual Open-Collector Comparator, 8-SOIC | onsemi
LM393DR2

LM393DR2 - Dual Open-Collector Comparator, 8-SOIC | onsemi

The onsemi LM393DR2 is a dual independent precision voltage comparator with open-collector outputs, supplied in an 8-pin SOIC (D) package on tape and reel. It supports single or split supply operation, provides a common-mode input range that extends down to the negative rail (ground) under single-supply conditions, and delivers a typical response time of 1300 ns in the low-offset-voltage LM393 class. A comparator is a differential amplifier whose output is driven to one of two logic states depending on the sign of the differential voltage applied to its two inputs. In the power hierarchy, a comparator sits between a linear amplifier and a logic gate: like an amplifier it senses small voltage differences, but like a logic element it produces a hard, saturated output rather than a proportional one. Two comparators packaged in one 8-pin SOIC give the designer a window detector, an over/under-voltage supervisor, or a pair of independent threshold stages in a single footprint. Key features of the LM393DR2 include its low offset voltage, which minimizes the input differential that must be exceeded before the output flips state, and its open-collector output stage. The open collector means the output is a pulled-down transistor rather than a push-pull driver, so an external pull-up resistor to the supply rail is required. This arrangement allows the designer to set the logic-high reference to any voltage in the system, and it lets several comparators share one bus when only one is active at a time. Internally, the device contains two fully independent comparator channels with their own input and output pins, so the two halves can be used for unrelated functions, powered from split rails, or used in complementary configurations. Because the outputs are open collector, the device can also be used as a simple line driver, relay driver, or lamp driver by sinking the load current through the output transistor with a suitable pull-up network. Typical applications include DC over-voltage and under-voltage protection, battery low-state detection, window comparators for temperature or light sensing, zero-cross detection in motor and mains circuits, and general threshold logic in industrial control boards. One key design point: because the output is open collector, always fit a pull-up resistor. Choose its value so that the resistor dissipates acceptable power while keeping output rise time acceptable, and confirm that the input common-mode range covers the full signal swing of your source node. This page consolidates the manufacturer description, package details, cross-reference data and drop-in alternatives, plus practical design notes, comparison parameters and application guidance that are not gathered in one place on a single datasheet page.

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LM393DR2G - Dual Open-Collector Comparator | onsemi
LM393DR2G

LM393DR2G - Dual Open-Collector Comparator | onsemi

The onsemi LM393DR2G is a dual precision voltage comparator with two independent comparison channels, an open-collector output, and an 8-SOIC package. According to the manufacturer product page, the LM393 series supports single or split-supply operation, and its common-mode input range can extend to ground during single-supply use. The device is suitable for general-purpose signal conditioning, threshold detection, and industrial control applications. A voltage comparator is an analog integrated circuit that compares two input voltages and produces a logic-level output indicating which input is higher. A dual comparator contains two electrically independent comparator channels in one package, allowing simultaneous or separate threshold-monitoring functions. The open-collector output requires an external pull-up resistor, which provides flexible output voltage and rise-time control while allowing several open-collector outputs to share a bus. The LM393 series offers two independent precision comparators and input offset voltage specifications as low as 2.0 mV, according to the onsemi LM393 product page. Its common-mode behavior supports single-supply designs where the lower supply rail is ground. The open-collector outputs are compatible with conventional pull-up-based digital interfaces, while the 8-SOIC package supports standard surface-mount assembly and rework. Operation is specified from a single 2 V to 36 V supply, as identified in the LM393DR2G Mouser listing. The device is a bipolar comparator rather than a rail-to-rail CMOS comparator. Its supply arrangement permits either a single positive rail with a grounded reference or split supplies around ground. Because the output transistor is open collector, the output can pull low but cannot actively drive a high voltage without a pull-up network. Typical uses include sensor-threshold detection, overvoltage and undervoltage monitoring, window comparators, industrial control interfaces, and logic-level translation. Two channels can monitor independent signals, or they can be configured together for a hysteretic switch or window detector. A pull-up resistor sets the passive output-high voltage and can be selected to suit the receiving logic family. Designers should verify input and output limits, common-mode range, response time, and load-current requirements against the manufacturer datasheet before applying the comparator outside nominal conditions. Keep the input common-mode voltage within its rated range, account for input offset when setting precision thresholds, and place the external pull-up resistor close enough to the output to limit parasitic capacitance and rise time. This page combines manufacturer-family information, distributor listings, verified package details, cross-reference candidates, application guidance, and design notes. It also distinguishes genuine pin-compatible options from package-only lookalikes and highlights the electrical checks required before replacing an LM393DR2G in an existing design.

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LM393DR2GH - Dual Low-Offset Comparator | onsemi
LM393DR2GH

LM393DR2GH - Dual Low-Offset Comparator | onsemi

onsemi LM393DR2GH is a dual independent precision voltage comparator with open-collector outputs, operating from single or split supplies up to 36 V, and housed in an 8-pin SOIC package. The device provides two independent comparator channels and an input offset voltage specification as low as 2.0 mV. A voltage comparator is an analog integrated circuit that compares two input voltages and produces a digital logic result indicating which input is higher. The LM393 belongs to the comparator hierarchy within analog and mixed-signal semiconductors. Its open-collector outputs can sink current while operating in a wired-OR configuration, making it especially useful for simple sensing, threshold detection, and system-level protection circuits. The two channels operate independently, allowing one package to implement two unrelated threshold functions. The 36 V maximum total supply rating supports both conventional single-supply operation and split-supply arrangements. The common-mode input range extends to ground with single-supply operation, while the open-collector output stage provides flexible interfacing with pull-up resistors and external loads. The low input offset voltage improves the accuracy of comparisons near their reference thresholds. An offset voltage as low as 2.0 mV means the comparator can resolve relatively small differential inputs, which is beneficial in window detectors, sensor interfaces, and protection circuits operating close to a reference voltage. The open-collector architecture avoids push-pull output contention when multiple detector outputs are combined. Typical applications include battery-voltage monitoring, overvoltage and undervoltage protection, temperature-sensor threshold detection, industrial control interfaces, and logic-level translation. The two independent channels can also monitor separate signals when their grounding and supply conditions remain compatible. A pull-up resistor is required on each output because the open-collector transistor does not actively drive a high output voltage. Designers should account for input common-mode limits, output pull-up values, output sink current, and the maximum differential input voltage when defining the circuit. Place bypass capacitance close to the supply pins and keep sensitive input traces away from switching nodes. Because the output is open collector, its rising-edge speed depends on the pull-up resistor, load capacitance, and total wiring capacitance. This product page consolidates the principal electrical characteristics, package details, pin assignments, application guidance, and verified drop-in comparison options. It also highlights practical differences among standard, improved, low-voltage, and low-power LM393-family choices to support faster design selection and board-level sourcing decisions.

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LM393DRE4 - Dual Open-Collector Comparator | Texas Instruments
LM393DRE4

LM393DRE4 - Dual Open-Collector Comparator | Texas Instruments

The Texas Instruments LM393DRE4 is a dual differential comparator with two independent comparator channels, an open-collector output, and an 8-pin SOIC package. The device operates from a single 2 V to 36 V supply, has a 300 ns response time, and is specified for applications up to 70°C. Its rail-to-rail input behavior and TTL-compatible outputs make it suitable for threshold detection, interface conversion, and open-collector bus designs. A comparator is an analog integrated circuit that compares two input voltages and changes its output state according to their relationship. The LM393 belongs to the hierarchy of dual comparator, voltage comparator, analog IC, and semiconductor. Unlike an operational amplifier with continuous linear output, a comparator is optimized for fast switching between two output states. Two independent channels allow one package to perform two threshold or protection functions. Key characteristics include two open-collector outputs, 300 ns propagation delay, operation from 2 V to 36 V, and a supply-current drain of 0.4 mA typical per comparator. The open-collector architecture requires an external pull-up resistor because the output transistor actively pulls the output low but does not source current. TTL compatibility supports connection to older digital logic, while the broad supply range accommodates both low-voltage control systems and higher-voltage industrial rails. Each channel contains an inverting input, a non-inverting input, and an output. When the non-inverting input is higher than the inverting input, the corresponding open-collector transistor turns on and pulls the output toward ground. Reversing the input relationship turns the transistor off and allows the pull-up resistor to raise the output. This behavior can be used for window detection, signal conditioning, current monitoring, and fault isolation without requiring a dedicated push-pull output driver. Typical uses include industrial sensor interfaces, battery monitoring, overvoltage and undervoltage detection, TTL-to-open-collector conversion, and embedded control logic. The SOIC-8 package simplifies assembly on conventional surface-mount boards, while the separate comparator channels allow one side of the circuit to monitor a power rail while the other handles a control threshold. External pull-up resistors must be selected according to the required sink current, logic voltage, rise time, and bus capacitance. The principal design consideration is that an open-collector output does not define a valid high voltage by itself. Place the pull-up resistor close to the relevant logic input, confirm that the sink current remains within the output rating, and account for bus rise time when capacitance is significant. The LM393DRE4 is best suited to commercial-temperature designs that require a low-cost, wide-supply dual comparator without rail-to-rail push-pull outputs. This page combines the device's core electrical characteristics, package details, application guidance, drop-in alternatives, and design trade-offs in a format that helps engineers evaluate the LM393DRE4 before integrating it into a comparator or protected-interface circuit.

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LM393DRG3 - Dual Open-Collector Comparator | Texas Instruments
LM393DRG3

LM393DRG3 - Dual Open-Collector Comparator | Texas Instruments

The Texas Instruments LM393DRG3 is a dual differential comparator with an open-collector output, operating from 2 V to 36 V and packaged in an 8-pin SOIC. The device contains two independent comparators, supports single or dual supplies, and produces outputs compatible with CMOS, MOS, and TTL logic. According to the Texas Instruments LM393 product page, it is designed for commercial-grade applications. A differential comparator is an analog integrated circuit that compares two input voltages and changes its output state according to their relationship. The LM393 belongs to the comparator hierarchy within analog and linear ICs, where its purpose is to convert a small voltage difference into a logic-level indication. Each half of the device can compare a sensed voltage against a reference or against another signal, making the part useful for threshold detection, supervision, and signal conditioning. The LM393 provides a 2 V to 36 V supply range and can operate with single supplies from 2 V to 36 V or dual supplies from ±1 V to ±18 V. Its differential input voltage range can equal the maximum-rated supply voltage, while its common-mode input range includes ground. The open-collector outputs permit wired logic, external pull-up resistors, and level translation, but require suitable pull-up components when the outputs drive CMOS or TTL loads. The two comparators are independent, allowing one channel to monitor a supply threshold while the other performs a second sensing or switching function. Low input bias current, low input offset voltage, and rail-to-rail input characteristics support accurate comparisons over a wide operating range. These characteristics make the device useful when the input signal is close to ground or when the reference voltage must be monitored with minimal loading of the source. Typical LM393DRG3 applications include window comparators for battery and power-supply supervision, zero-cross detection in control systems, sensor threshold conditioning, relay-driver interfaces, and general industrial logic interfaces. The open-collector architecture is especially useful when a system needs a wired-AND output or a voltage level different from the comparator supply voltage. An external pull-up resistor sets the resulting high level. Designers should verify input common-mode limits, output pull-up values, and output-current requirements before finalizing the circuit. The open collector sinks current but does not actively source a high-level voltage, so each output requires an appropriate pull-up network unless another compatible open-collector device supplies it. Keep pull-up routing short and account for rise time when driving longer traces or high-capacitance nodes. This page combines the LM393DRG3 operating limits, package details, verified drop-in alternatives, comparison parameters, and application guidance to support component selection and board-level implementation. The LM393DRG3 is particularly suitable when a dual, general-purpose comparator with open-collector outputs and wide supply-voltage operation is required in an 8-pin SOIC footprint.

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LM393DRG4 - Dual Open-Collector Comparator | Texas Instruments
LM393DRG4

LM393DRG4 - Dual Open-Collector Comparator | Texas Instruments

Texas Instruments LM393DRG4 is a dual differential comparator designed for commercial-grade applications, with two independent comparator channels in an 8-pin SOIC package. It uses open-collector outputs, supports rail-to-rail input operation, and operates from a single power supply over a wide voltage range. The open-collector architecture requires an external pull-up resistor and permits the output to be pulled to a level compatible with TTL, MOS, or CMOS logic. A comparator is a semiconductor integrated circuit that compares two input voltages and produces a digital-level indication of their relationship. Within the power-management hierarchy, a comparator belongs to the analog signal-conditioning and interface class, where it bridges low-level analog signals and digital control logic. The LM393 combines two independent channels in one package, making it useful where two thresholds, sensor outputs, or protection events must be evaluated. Key features include dual differential comparison, a differential input range equal to the maximum rated supply voltage of plus or minus 38 V, rail-to-rail input behavior, and open-collector outputs compatible with TTL, MOS, and CMOS systems. The differential range means each channel can accept a wide voltage difference between its inverting and non-inverting inputs. The open-collector output can sink current from the output stage while the external pull-up establishes the logic-high voltage, allowing the interface voltage to be selected independently from the comparator supply. The LM393B and LM2903B families are identified by Texas Instruments as drop-in replacements for LM293, LM393, and LM2903 devices in A and V grades. This makes the LM393DRG4 useful as a familiar general-purpose comparator where a new design does not require a rail-to-rail output stage or a push-pull output architecture. The two channels are independent, allowing one package to monitor two separate analog conditions. Typical uses include overvoltage and undervoltage detection, battery monitoring, sensor thresholding, industrial control interfaces, and general digital logic conditioning. The open-collector output also supports wired-AND behavior when multiple comparator outputs share a pull-up. Open-collector comparators are particularly useful when several devices must signal one shared node or when the logic-high voltage must differ from the comparator supply. Designers should account for the required pull-up resistor, input common-mode limits, output sink-current limits, and propagation-delay behavior when choosing system timing. Keep sensitive input traces short, maintain adequate supply bypassing, and account for the influence of output pull-up resistance on switching speed and rise time. Use the manufacturer datasheet pin-description and electrical-characteristics tables before assigning PCB functions or interpreting logic thresholds. This page combines the manufacturer product information, distributor identification, package details, and engineering guidance to support product selection. It also organizes drop-in alternatives, application guidance, comparison parameters, and design cautions so engineers can evaluate the LM393DRG4 without confusing package compatibility with full electrical equivalence.

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