Circuitos integrados

LM2903DRG3

LM2903DRG3 - Dual Open-Collector Comparator | Texas Instruments

The Texas Instruments LM2903DRG3 is a dual differential comparator with open-collector outputs, operating from 2 V to 36 V on a single supply or ±1 V to ±18 V on dual supplies, in an 8-pin SOIC package. Each of the two independent comparator channels draws 200 µA of supply current and offers a 1 µs response time, making the LM2903DRG3 a standard general-purpose comparator for industrial, automotive and instrumentation signal chains. A comparator is a differential amplifier whose output is driven to a logic state when one input exceeds the other by more than the input offset voltage. It belongs to the amplifier IC family, sits under the operational amplifier hierarchy, and ultimately falls inside the linear and signal-conditioning IC category. Unlike an op-amp, a comparator has no linear output region and is not intended for open-loop gain; its open-collector output is designed to pull a rail low and to be pulled up externally, which allows it to sink more current than a CMOS push-pull output can. Key features include a maximum rated supply of up to 38 V, an ESD rating of 2 kV HBM, a low input offset voltage of 0.37 mV and a low input bias current of 3.5 nA, all of which improve threshold accuracy and reduce source loading on the sensed signal. The differential input voltage range is equal to the maximum rated supply voltage at ±38 V, and the common-mode input voltage range includes ground, allowing the device to monitor bipolar signals referenced to 0 V. Outputs are compatible with TTL, MOS and CMOS logic families. Electrically the device is a bipolar dual differential comparator with an open-collector output stage. The open-collector architecture means the output can be pulled to any supply level the system uses, and a pull-up resistor sets the high level. This is essential in relay-drive, lamp-drive and level-shifting designs where the load requires more current than the IC itself can source. Typical applications include industrial sensor threshold detection, battery and rail window comparison, overvoltage and undervoltage protection in power supplies, temperature monitoring with thermistors or RTDs, and current-sense comparison in motor drive and inverter control stages. When designing with the LM2903DRG3, always place the pull-up resistor close to the output pin and check that the total sink current stays within the output rating, because the open-collector transistor, not the internal drive, sets the load capability. This page consolidates parametric data, drop-in alternatives, comparison tables and practical design notes so engineers can evaluate the LM2903DRG3 against equivalent dual comparators without rebuilding the analysis from scratch.

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LM2903DRG4

LM2903DRG4 - Dual 30V Open-Collector Comparator | Texas Instruments

Texas Instruments LM2903DRG4 is a dual differential voltage comparator with an open-collector output, supplied in an 8-pin SOIC package. It operates from a single supply over a 2 V to 30 V range, or from dual supplies when the total supply difference remains within 2 V to 36 V. The device contains two independent comparators, making it suitable for threshold detection, window comparison, and industrial control functions. The LM2903 is a general-purpose comparator within the broader category of analog comparator ICs. A comparator evaluates two input voltages and produces a logic-level result indicating which input is higher. In an open-collector implementation, the output stage can sink current while remaining in a high-impedance state when the device is inactive. This architecture allows external pull-up resistors to set the output voltage and interface with TTL, MOS, or CMOS logic. Key characteristics include a 2 V to 30 V supply range for the non-V device, a 30 V maximum supply rating, approximately 1.3 microsecond propagation delay, and typical supply-current drain of approximately 0.4 mA per comparator. The input common-mode range includes ground, and the differential input voltage range is equal to the maximum-rated supply voltage at ±38 V for the versions described by the manufacturer. The open-collector outputs require pull-up resistors when connected to digital logic. The outputs are intended to sink rather than source output current, so the pull-up resistor value determines the rise time, power consumption, and compatibility with the receiving logic. The wide supply range and low-power operation make the LM2903 suitable for process control, power supervision, sensor conditioning, and general-purpose threshold detection. When designing around the LM2903, verify the supply limits, common-mode input range, differential input limits, output pull-up network, and the switching behavior required by the downstream circuit. The device is a dual comparator, so each channel is independent, but both channels share the same supply pins and package footprint. The SOIC-8 format supports conventional surface-mount assembly and provides a practical upgrade path from through-hole comparator designs when the pin configuration is verified. This page brings together the manufacturer product information, verified distributor references, package details, drop-in comparison options, and application guidance for engineers evaluating the LM2903DRG4 in new analog-control and embedded-system designs.

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LM2903EPWRQ1

LM2903EPWRQ1 - Automotive Dual Comparator | Texas Instruments

The Texas Instruments LM2903EPWRQ1 is an automotive dual differential comparator with two independent comparator channels, open-collector outputs, and operation across a 2 V to 30 V supply range. It is qualified to AEC-Q100 Grade 0 and Grade 1 and is packaged in an 8-pin TSSOP (PW) package for automotive and industrial systems. The device is intended for high-voltage signal-chain applications where a robust differential input comparator is needed to monitor two voltages and report their relationship. A comparator is an analog integrated circuit that compares an input voltage with a reference or threshold voltage and switches its output when the differential polarity changes. LM2903EPWRQ1 belongs to the differential comparator family within the broader voltage-comparison, signal-conditioning, and power-management IC hierarchy. Its differential inputs allow one signal to be evaluated against another rather than against a fixed internal reference, making it useful for threshold detection, overvoltage and undervoltage monitoring, sensor conditioning, and control systems. The dual-channel architecture provides two comparators in one package while keeping each channel independent. The open-collector output structure allows the output transistor to remain off when the output is high-impedance, which supports wired logic, pulled-up buses, and systems requiring an external pull-up resistor. The automotive qualification provides an important distinction from standard industrial comparator variants because the LM2903-Q1 family is characterized for Grade 0 and Grade 1 operating environments. Typical applications include automotive battery monitoring, 12 V and 24 V power-system supervision, sensor threshold detection, window and system monitoring, industrial control panels, and automotive actuator or interface circuits. The 30 V maximum supply rating provides useful headroom for systems with battery transients and elevated industrial rails. When designing a comparator circuit, verify the input common-mode range, output pull-up requirements, propagation delay, and the electrical limits for the intended automotive operating environment. The LM2903EPWRQ1 is supplied in an 8-pin TSSOP (PW) package, allowing compact PCB placement while supporting the pin arrangement of the LM2903-Q1 family. For new designs, confirm the selected ordering code against the manufacturer datasheet and validate the external pull-up resistor and input filtering for the specific signal environment.

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LM2903FVJ-E2

LM2903FVJ-E2 - Dual Ground-Sense Comparator | ROHM Semiconductor

ROHM Semiconductor LM2903FVJ-E2 is a dual-channel, general-purpose ground-sense comparator with open-collector outputs and a 3 V to 32 V operating supply range. The device is packaged in an 8-pin TSSOP-B8J package and is supplied in tape-and-reel packing. ROHM lists the LM2903FVJ as Not Recommended for New Designs, so the part is best evaluated for existing designs, maintenance, and previously qualified industrial equipment rather than new product creation. A comparator is an analog integrated circuit that compares two input voltages and produces a logic-level result indicating which input is higher. The dual architecture provides two comparison channels in one package, reducing component count when a board needs independent threshold decisions. The LM2903FVJ-E2 is intended for ground-sense applications, where a comparator evaluates a signal relative to a ground-referenced threshold and drives an open-collector output. Open-collector outputs allow wired-AND behavior when several outputs share a pull-up resistor, which is useful in alarm, interlock, and system-fault signaling circuits. The key operating characteristics are the 3 V to 32 V supply range, two comparator channels, ground-sense input arrangement, and open-collector output architecture. The broad supply range allows the device to operate from conventional 5 V and 12 V industrial rails as well as higher-voltage systems, subject to the limits in the manufacturer datasheet. Its open-collector output stage requires an external pull-up resistor when a logic-high output is required. The output should not be assumed to drive a load directly; the pull-up resistor, downstream logic input, and fault-state behavior must be checked together. Typical uses include overvoltage and undervoltage indication, ground-fault detection, battery or power-supply monitoring, industrial control interlock logic, threshold-based signal conditioning, and general embedded control. The comparator can operate directly from higher-voltage rails, but the input pins, output pull-up network, grounding, and protection network must remain within their specified limits. External filtering or clamping may be required when the monitored signal contains transients or exceeds the input common-mode range. Designers should review the ROHM datasheet for the complete electrical limits, input common-mode range, output sink-current capability, response-time behavior, and package details before release to production. Because the manufacturer marks the LM2903FVJ as Not Recommended for New Designs, a responsible product decision should compare current ROHM alternatives rather than treating this part as the preferred choice for a fresh design. Existing production equipment may still benefit from a qualified replacement strategy when availability, lifecycle status, and electrical compatibility are reviewed. This product summary consolidates the manufacturer product identity, package information, lifecycle status, operating-range information, practical application guidance, and sourcing questions into one engineering reference. It is intended to support initial part identification, circuit review, and replacement planning without replacing the complete manufacturer datasheet.

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LM2903FVT-E2

LM2903FVT-E2 Dual Ground-Sense Comparator | ROHM

ROHM Semiconductor LM2903FVT-E2 is a dual-channel ground-sense comparator with open-collector outputs, a 3 V to 32 V operating-voltage range, and low supply current. The device is supplied in an 8-pin TSSOP-B surface-mount package for compact industrial and automotive electronic systems. Its two independent comparator channels compare input signals against ground-sensitive thresholds and drive open-collector outputs suitable for pull-up-based interfacing. A comparator is an analog integrated circuit that evaluates one input voltage relative to another and changes its output state when the relationship between those voltages crosses a defined threshold. The LM2903 series belongs to the broader open-collector comparator hierarchy, which combines analog signal conditioning, threshold detection, and digital-compatible output signaling. Ground-sense operation is particularly useful when the reference or monitored signal is referenced to the system ground rather than to a mid-supply rail. The principal features of the LM2903FVT-E2 include two comparator channels, a wide 3 V to 32 V supply range, low supply current, and open-collector outputs. The open-collector architecture allows the output transition speed to be influenced by an external pull-up resistor and load capacitance. This flexibility makes the device suitable for wired logic, relay or solenoid interfaces, threshold monitoring, and systems where the pull-up voltage must be selected independently from the comparator supply. The wide operating-voltage range allows the comparator to operate from low-voltage 3 V systems through substantially higher supply rails, subject to the absolute maximum ratings and application conditions defined by the manufacturer. Because each channel uses an open-collector transistor, an external pull-up resistor is required to establish a valid high output level. The pull-up voltage, resistor value, allowable sink current, and rise time should be selected together according to the required operating frequency and connected load. Typical applications include automotive and industrial control modules, battery-powered equipment, overvoltage and undervoltage detection, sensor-threshold conditioning, window or level detection, and general digital control systems. The low supply-current characteristic is particularly relevant to systems that maintain operation across a broad supply range without continuously operating from a tightly regulated rail. The TSSOP-B package supports compact layouts, although careful PCB planning remains necessary for clean signal routing. For reliable implementation, connect the required pull-up resistor to the pull-up supply, keep comparator input traces short, and avoid routing high-current or fast-switching paths near the input pins. Confirm the input common-mode limits, differential input limits, output current, and supply decoupling requirements against the manufacturer datasheet for the selected automotive and temperature grades before production release. This product record combines the manufacturer product description with distributor packaging information and practical guidance for comparator implementation, PCB integration, output pull-up design, and drop-in replacement assessment. It also distinguishes verified ordering information from engineering assumptions so engineers can review the circuit and manufacturing implications before selecting a comparator for a new design.

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LM2903HD

LM2903HD - Dual 36V Open-Collector Comparator | STMicroelectronics

STMicroelectronics LM2903HD is a low-power dual differential voltage comparator designed for single-supply operation from 2 V to 36 V or dual-supply operation from ±1 V to ±18 V. Each channel provides an open-collector output, and the device is supplied in an 8-pin SOIC package with tube packing. The LM2903HD combines two independent comparators in one package for threshold detection, level translation, window sensing, and general-purpose signal conditioning. 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. The LM2903 belongs to the comparator hierarchy within analog and mixed-signal semiconductors. Its open-collector outputs can sink current from a pull-up network, making the device suitable for wired logic, relay drivers, and interface applications where the output must connect to another supply domain. The STMicroelectronics LM2903 datasheet identifies a wide supply range of 2 V to 36 V under single-supply operation and ±1 V to ±18 V under dual-supply operation. It also specifies low supply-current drain independent of supply voltage and a typical drain of 0.4 mA per comparator. These characteristics allow economical operation from industrial, automotive, and embedded supply rails while preserving useful input and output operating ranges. The differential input arrangement places the inverting and non-inverting terminals on separate comparator channels. When the voltage applied to the non-inverting input exceeds the corresponding inverting input, the associated open-collector output transitions according to the comparator's polarity. External resistors normally define the output high state because an open-collector transistor actively pulls the output low but does not source a sustained output voltage. Typical LM2903HD applications include DC threshold detection, battery-voltage monitoring, sensor signal conditioning, window comparators, and logic-level translation. The dual-channel configuration reduces component count in circuits requiring two independent comparisons. Its open-collector outputs also support wired-AND behavior when multiple comparator outputs share a pull-up resistor. PCB design should keep comparator inputs and feedback components away from switching nodes and high-current return paths. Place input resistors and feedback resistors close to the device, use a solid ground reference, and add supply bypassing where required by the implementation. Validate output pull-up values against sink-current limits, propagation delay, and the required logic rise time. This product page combines manufacturer specifications, ordering information, package details, application guidance, and pin-compatible comparison information. It is designed to help engineers identify the LM2903HD quickly, verify its electrical limits, and select an appropriate second source without changing the PCB footprint.

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LM2903ITLX/NOPB

LM2903ITLX/NOPB - Dual Low-Power Open-Collector Comparator, 8-DSBGA

The Texas Instruments LM2903ITLX/NOPB is a dual, low-offset, open-collector differential comparator in an 8-ball DSBGA package, with two independent comparator channels operating from a single supply between 2 V and 36 V. Each channel offers an input offset voltage as low as 2.0 mV maximum for the LM193-series family, an input bias current of 0.25 uA maximum at 5 V, a typical output sink current of 16 mA at 5 V, and a propagation delay of 700 ns maximum. A comparator is a differential input amplifier whose output switches state when one input exceeds the other by more than the offset voltage. Comparators sit at the bottom of the analog signal chain as the decision element that converts a small analog difference into a logic-level event. The LM2903 belongs to the LM193/LM2903/LM393 family, a classic general-purpose voltage comparator family, and this device adds a low-power, wide-supply differential pair plus a saturating open-collector transistor output stage. Key features of the LM2903ITLX/NOPB include open-collector outputs that can be pulled up to any logic level up to the supply rail, differential input range of plus or minus 18 V, common-mode input voltage range that includes ground, an industrial temperature grade of -40 C to +85 C, and total quiescent current of 2.5 mA maximum for the pair. The open-collector architecture allows multiple comparators to be wire-ORed on a shared pull-up resistor, which is the standard technique for driving slow, high-voltage relay, lamp, or open-drain bus loads. Internally the device is a bipolar dual-diff-pair design with an emitter-stabilized differential input stage feeding a saturated open-collector output transistor. Because the output stage is open collector rather than push-pull, output rise and fall times are set by the pull-up resistor and the load capacitance rather than by an internal driver, which allows a designer to trade speed for EMI margin. The wide 2 V to 36 V supply span lets a single part sense signals referenced to either a low-voltage logic rail or a 24 V industrial bus. Typical applications include over/under-voltage and window monitoring in power supplies, sensor threshold conditioning for industrial and automotive sensing chains, zero-cross and level detection in motor control and drive electronics, open-drain bus arbitration in multi-drop industrial networks, and general-purpose analog signal conditioning where an open-collector output must drive a relay or an opto-isolator. Design consideration: because the outputs are open collector, an external pull-up resistor is mandatory, and its value sets the output rise time. Keep pull-ups high enough to limit sink current within the 16 mA typical output rating, and low enough to achieve the required switching speed with the total bus capacitance. This page consolidates parametric detail, drop-in alternatives for the same 8-DSBGA footprint, and practical layout and pull-up guidance that is not assembled in one place in the original LM2903 documentation.

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LM2903M

LM2903M - Dual Differential Comparator | Texas Instruments

The Texas Instruments LM2903M is a dual differential comparator in an 8-pin SOIC package. It contains two independent comparator channels, operates from a single supply or split supplies, and provides open-collector output stages suitable for driving external pull-up networks. The verified distributor listing identifies the device as a standard general-purpose comparator with rail-to-rail input capability, while the linked Fairchild datasheet describes the LM2903 family as a dual differential comparator designed for operation from a 2 V to 36 V supply. The LM2903M combines two precision comparators with low input offset voltage, low supply current, and a propagation delay listed by a verified distributor source as 1.5 microseconds. A comparator is a differential amplifier with a logic output rather than a conventional analog output. It evaluates the voltage relationship between its inverting and non-inverting inputs and produces a saturated digital state when the selected input exceeds the reference. In the LM2903M, two independent channels allow one device to perform two threshold decisions, window comparisons, or complementary sensing functions. This makes the part useful as a building block within logic ICs, interface ICs, industrial control systems, and discrete analog signal-conditioning circuits. Key features include dual differential comparison, an open-collector output, single-supply operation from 2 V to 36 V, support for split-supply operation, and an 8-SOIC surface-mount package. The open-collector outputs can be wired to a common pull-up rail when multiple comparators need a shared bus, although the pull-up resistor and external logic voltage must be selected for the intended interface. The reported 1.5 microsecond response time is adequate for many industrial and control applications where the system does not require sub-microsecond decisions. The LM2903 family is designed for low-power operation independent of the supply voltage, which helps conserve energy in battery-powered and distributed equipment. Each channel has independent input and output behavior, allowing one channel to monitor a sensor while the second channel provides an alarm, window-limit, or control function. Input and output behavior should still be checked against the complete manufacturer datasheet for the exact ordering code before production use. Typical applications include battery monitoring, industrial sensor interfaces, overvoltage and undervoltage detection, temperature threshold circuits, power-supply sequencing, and general-purpose logic control. The open-collector output is especially useful when driving a relay, opto-isolator, or another device that requires a pulled-up supply domain. The SOIC-8 footprint is suitable for conventional surface-mount PCB assembly, but the exposed package dimensions and lead geometry should be checked against the mechanical drawing. For a reliable design, begin by verifying the input common-mode range, output sink current, supply-current limits, and propagation delay against the required operating conditions. Do not leave the open-collector outputs without an appropriate pull-up resistor unless the intended load provides one. Decoupling capacitors should be placed close to the supply and ground pins, and input traces should be kept short to reduce noise pickup. This product page combines verified manufacturer and distributor information with engineering guidance, comparison data, and practical design notes to support component selection and PCB implementation.

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LM2903M8-13

LM2903M8-13 - Dual 36V Comparator | Diodes Incorporated

The Diodes Incorporated LM2903M8-13 is a dual differential analog comparator with two independent comparison channels, a 36 V maximum supply rating, and an 8-pin MSOP package. The device supports single-supply and split-supply operation and is designed for general-purpose signal comparison with open-collector outputs compatible with TTL, CMOS, and MOS logic. An analog comparator is an integrated circuit that compares two input voltages and changes its output state according to their relationship. The LM2903 belongs to the differential-comparator hierarchy, which includes precision comparators, voltage comparators, and general-purpose analog interface ICs. Unlike an operational amplifier, a comparator is optimized for fast decision-making, open-drain or open-collector output signaling, and straightforward connection to digital logic rather than linear analog amplification. The LM2903M8-13 provides two independent comparator channels, a wide 36 V operating range, and a specified 300 ns propagation-delay class. Its low input offset voltage supports decisions when the compared signals differ only slightly. The open-collector architecture permits wired logic, pull-up resistor selection, level translation, and compatibility with multiple logic families. Operation from a single positive supply or from positive and negative split supplies makes the device suitable for both conventional and bipolar signal environments. The LM2903 series uses an open-collector output stage rather than a totem-pole output. Each output therefore requires an external pull-up resistor when used as a normal logic driver. This architecture can provide wired-AND behavior, but it can also expose unused outputs to leakage current and requires careful pull-up selection. The two channels are electrically independent, allowing one device to serve two unrelated threshold, window, sorting, or fault-detection functions. Typical uses include sensor threshold detection, battery and power-supply monitoring, window comparators, overvoltage and undervoltage protection, signal conditioning, relay or reset-control logic, and general interface between analog sensors and digital systems. In dual-rail systems, the split-supply capability supports comparison of bipolar signals. In single-supply systems, the comparator can compare a sensor output against a reference voltage while driving a pull-up-based digital output. Designers should verify input common-mode limits, output current, response time, and pull-up requirements against the intended supply conditions. Keep the comparator input and output paths away from high-current switching nodes, use short traces over a continuous ground plane, and place the pull-up resistor close to the output. Because the open-collector output cannot source current, the chosen resistor must satisfy both the required sink current and the logic-family input-current limits. This product page combines the exact LM2903M8-13 package and rating information with application guidance, engineering design notes, and verified cross-reference results. It also distinguishes confirmed same-package drop-in options from comparator parts that require a different footprint, helping PCB designers avoid substitutions that cannot be installed without redesign.

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LM2903MX

LM2903MX - Dual Differential Comparator | Texas Instruments

Texas Instruments LM2903MX is a dual differential analog comparator containing two independent general-purpose comparator channels in an 8-pin SOIC package. Each channel supports single-supply operation from 2 V to 36 V or dual-supply operation from 1 V to 18 V, and the device includes rail-to-rail input capability, an open-collector output, and a typical response time of 1.3 us. The open-collector outputs are compatible with CMOS, MOS, and TTL logic. An analog comparator is an integrated circuit that evaluates two input voltages and changes its output state according to their relative polarity. Within the semiconductor hierarchy, a comparator belongs to the broader group of analog ICs and serves as an interface between sensors and digital logic. The LM2903MX is useful when a design needs to detect crossings, thresholds, overvoltage, undervoltage, or differences between two analog signals without converting them into a digital quantity. The two channels operate independently, allowing one device to implement two unrelated threshold functions. Key features include comparison of input voltages near ground potential, a wide supply range, low current drain, and open-collector outputs that require an external pull-up resistor. Rail-to-rail input behavior is particularly valuable when the signal of interest lies close to either supply rail. The specified 1.3 us response time makes the comparators appropriate for power-line, protection, sensing, and general signal-conditioning circuits. Typical uses include monitoring a divided battery voltage, detecting an over-temperature condition with a sensor, comparing an adjustable reference with an analog input, and translating a sensor threshold into a logic-level event. The open-collector topology also allows several comparator outputs to share a wired bus when each output has a suitable pull-up and the system design accounts for the resulting behavior. PCB implementation should follow the manufacturer pin-description table and place input, output, and decoupling connections to minimize switching noise. Input traces should be kept short and away from high-current paths. Use a pull-up resistor sized for the target logic family, and verify its maximum current across all operating conditions. Do not substitute a push-pull output device without reviewing the full pinout and signal behavior. This page compares the LM2903MX with documented same-footprint alternatives, summarizes verified electrical and package characteristics, and adds practical PCB, logic-interface, and replacement guidance for engineers evaluating this dual comparator.

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LM2903MX/NOPB

LM2903MX/NOPB - Dual Open-Collector Comparator | Texas Instruments

Texas Instruments LM2903MX/NOPB is a dual differential analog comparator with two independent comparator channels, low offset voltage, open-collector outputs, and rail-to-rail input capability in an 8-pin SOIC package. The device is intended for low-power applications operating from a single supply or split supplies, with a manufacturer-specified operating temperature range of -40°C to 85°C for this ordering variant. An analog comparator is a semiconductor that compares two input voltages and produces a logic-level indication of their relationship. The LM2903 belongs to the broader voltage comparator hierarchy, where each channel can evaluate a non-inverting input against an inverting input. Its open-collector outputs can sink output-stage current while leaving the output otherwise undriven in the high state, allowing a pull-up resistor to establish the logic-high voltage and support wired logic or level translation. The LM2903 provides two independent comparators in one package. Its differential input arrangement is useful when a circuit must detect whether a measured voltage is above or below a reference threshold. The low-offset characteristic reduces the input-voltage difference required to change output state, which is valuable in sensing circuits where small signal changes must be resolved accurately. Open-collector outputs also provide flexibility when driving pull-up resistors to a supply selected by the system designer. The rail-to-rail input characteristic expands the usable common-mode range of the comparator, while the low-power architecture suits battery-powered and general-purpose industrial designs. Because the two channels are independent, one package can implement two threshold detections, window-limit functions, or separate monitoring functions. Common implementations include overvoltage detection, undervoltage indication, temperature or sensor threshold switching, and simple control-loop decisions around a regulated supply. Typical applications include industrial control boards, battery-powered instrumentation, sensor interfaces, power-supply supervision, and embedded systems requiring logic-compatible threshold decisions. The 8-pin SOIC package supports conventional surface-mount assembly and works well where moderate pin count and straightforward layout are priorities. It is also a familiar functional family for designs built around the LM2903, LM2903-N, and related dual-comparator platforms. When designing the circuit, choose the external pull-up resistor to establish a valid logic-high voltage and check that the intended sink current remains within the output-device limits. Keep comparator inputs away from switching-node edges where practical, and evaluate input bias-current effects when the source impedance is high. The open-collector architecture avoids an active push-pull output but requires correct pull-up selection for dependable logic levels. This product data combines the exact ordering information for LM2903MX/NOPB with practical guidance on pin use, logic interfacing, common-mode behavior, and drop-in alternatives. It also organizes the comparator’s electrical, environmental, package, and sourcing attributes for faster engineering selection and PCB planning.

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LM2903N

LM2903N - Dual Voltage Comparator, Open-Collector, 8-DIP | TI/STMicro/onsemi

The LM2903N is a dual-channel low-offset voltage comparator supplied in an industry-standard 8-pin PDIP (DIP-8) through-hole package. It integrates two independent precision comparators with 2.0 mV typical input offset voltage, an open-collector output stage capable of swinging to the negative rail (ground-sense at single supply), and operates from a 2 V to 36 V single supply or ±1 V to ±18 V dual supply rail. The output transistor sinks up to 16 mA typical (6 mA minimum over temperature), making the part suitable for directly driving low-power relays, LEDs, and logic interfaces. A voltage comparator is an analog building block that compares two input voltages and produces a binary digital output; when the non-inverting input exceeds the inverting input, the output switches state. The LM2903N belongs to the LM393/LM2903 family - a long-standing industry standard introduced for low-power single-supply sensing, and it sits in the hierarchy: comparator -> analog comparator -> signal conditioning IC -> integrated circuit. Its open-collector architecture requires an external pull-up resistor (typically 10 kohm to VCC), which lets multiple comparators be wire-ORed together and lets the output pull to a different rail than the supply voltage. Key specifications include a 1.3 us typical response time at 5 V/2 mA, a 2.5 mV maximum input offset voltage (LM2903 grade), an input bias current of 25 nA typical, and ESD clamps on the inputs that tolerate human-body-model discharge. The device operates across the automotive-industrial -40 C to +125 C range (LM2903N suffix N designates the PDIP-8 package, not the temp grade). The LM2903's architecture uses a PNP input stage that gives the inputs an exceptionally wide common-mode range that includes the negative rail (ground), which is why single-supply ground-referenced sensing is its dominant application. The open-collector NPN output stage isolates the comparator logic from the load voltage; only the pull-up rail sets the high-level output. Typical applications include battery monitoring in 12 V/24 V automotive and industrial systems (window detectors, under-voltage cutoff), zero-crossing detectors for mains interfaces when paired with an optocoupler, line-receiver / level-shift interfaces between high-voltage analog and low-voltage logic, threshold alarms and signal-conditioning front-ends, and oscillator / relaxation-oscillator circuits. When designing with the LM2903N, observe one trade-off: open-collector outputs use a pull-up resistor that adds RC delay to the rising edge - at 10 kohm with 100 pF of trace capacitance, rise time is about 1 us. For high-speed logic interfaces downstream, size the pull-up conservatively or use a discrete or integrated push-pull comparator when sub-microsecond edge rates are needed.

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LM2903P

LM2903P - Dual Differential Comparator, 30 V, PDIP-8 | Texas Instruments

The Texas Instruments LM2903P is a dual differential comparator with open-collector, rail-to-rail outputs, supplied in an 8-pin PDIP package. The device contains two independent voltage comparators designed for general-purpose signal conditioning, threshold detection, and simple control applications. The verified distributor and manufacturer data identifies the LM2903 as a dual differential comparator intended for operation from a single supply or dual supplies, with a maximum supply voltage rating of up to 38 V for the B-version family and a listed operating supply range of 2 V minimum for comparison devices in the same family. A comparator is an analog integrated circuit that compares two input voltages and produces a digital logic result. The LM2903 family belongs to the broader comparator and analog signal-conditioning hierarchy, where open-collector outputs provide flexible interface options for pull-up resistors, relay drivers, lamp circuits, and low-voltage digital logic. Its differential inputs allow one signal to be monitored against a reference or another input, making the device suitable for window detection, current sensing, sensor thresholding, and industrial control circuits. The LM2903P uses two independent comparators, with output transistors capable of sinking current into an external pull-up network. The verified data identifies the output style as open-collector and rail-to-rail, while the family description confirms two independent voltage comparators and operation from a single power supply over a wide voltage range. The LM2903P is supplied through a tube package in the verified distributor result, making it appropriate for through-hole production and prototype boards rather than compact surface-mount assemblies. Typical uses include monitoring a control voltage, detecting an overvoltage or undervoltage condition, converting an analog sensor threshold into a logic event, and driving an alert or shutdown input. Because an open-collector output requires an external pull-up resistor, the output voltage is defined by the pull-up supply and resistor rather than by the comparator alone. Designers should also verify input common-mode limits, output sink current, supply-current requirements, and propagation delay for the exact operating conditions. The principal design consideration is that the LM2903P is a through-hole PDIP-8 comparator, not a low-power modern micropower comparator. Its application circuit must respect the device's supply voltage, input voltage, common-mode range, output pull-up arrangement, and maximum output current. This page combines the verified manufacturer and distributor information with practical application guidance and same-family replacement context for engineers evaluating an LM2903P design.

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LM2903PT

LM2903PT - Dual Low-Power Voltage Comparator, +2V to +36V | STMicroelectronics

The STMicroelectronics LM2903PT is a low-power dual voltage comparator with two independent, single-pole comparators on a single monolithic substrate, supplied in an 8-pin TSSOP (8TSSOP) surface-mount package. It operates from a single +2 V to +36 V supply or from dual supplies of +/-1 V to +/-18 V, drawing only 0.4 mA of supply current independent of supply voltage, equal to 1 mW per comparator at +5 V. A voltage comparator is an amplifier IC that compares two input voltages and switches its output when the difference between them changes sign. In system terms a comparator sits at the base of the hierarchy of analog signal conditioning: comparator -> amplifier IC -> analog integrated circuit -> semiconductor, and it is the natural front end for threshold detection, sensor signalling and window monitoring. Because the LM2903 output is an open-collector style transistor stage, it interfaces directly with TTL, MOS and CMOS logic families and can pull a rail low without an external push-pull driver. Key features of the LM2903PT include a common-mode input voltage range that includes ground even when operated from a single supply, very low supply current drain of 0.4 mA, low input bias current of 25 nA typical, and low input offset current of +/-5 nA typical. The low offset current means the two comparators of the pair track each other closely, which matters when one channel is used as a reference and the other as the active comparator in a window-detector arrangement. The device is built on a bipolar monolithic process, which explains the wide supply range and the ability to accept input signals near and beyond ground. Two comparators share one package, so a single 8-pin TSSOP footprint can implement a full two-threshold window comparator, a dual-level battery monitor, or a pair of independent limit detectors for analog signals with only one board space increment. Typical applications include industrial control and instrumentation thresholds, battery-powered monitoring and protection circuits, motor and solenoid drive control loops, sensor interface modules, and consumer equipment power supervision. Because supply current is independent of the supply voltage, the part remains usable across wide battery-discharge ranges without the quiescent current rising as the cell voltage falls. When laying out the design, route the two input nets as short and separated as possible, keep the open-collector output pull-up resistor close to the device, and confirm that the logic family connected to the output can tolerate the pull-up voltage. Use the pin-description table in the STMicroelectronics datasheet when assigning PCB tracks. This page brings together the supply-voltage and input-current characteristics, drop-in alternatives that share the identical TSSOP-8 footprint, comparison tables and practical design notes that go beyond a bare parameter listing, helping engineers qualify the part quickly for industrial, automotive-adjacent and consumer designs.

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LM2903Q2T

LM2903Q2T - Dual Low-Power Voltage Comparator | STMicroelectronics

STMicroelectronics LM2903Q2T is a dual, independent, low-power voltage comparator designed for single-supply or split-supply operation across a wide voltage range. The device is identified as a standard general-purpose comparator with open-collector, rail-to-rail outputs and is packaged in an 8-DFN 2 x 2 mm package. Its two comparator channels can be used separately or together for threshold detection, overvoltage and undervoltage monitoring, signal conditioning, and basic analog control functions. A voltage comparator is an analog mixed-signal IC that compares an input voltage with a reference voltage and changes its output state when the relationship between those voltages changes. The LM2903 belongs to the comparator hierarchy, which sits between general-purpose analog signal conditioning and system-level protection or control. Its open-collector outputs can be pulled up to a suitable supply rail, allowing interface compatibility with TTL, CMOS, MOS, and other digital logic when the output circuit is designed correctly. The LM2903Q2T is specifically suited to low-power applications because the manufacturer identifies it as a low-power dual comparator. Its two independent channels provide flexibility in battery-operated equipment, industrial sensing, automotive electronics, consumer products, and embedded control systems. The 2 x 2 mm DFN package also supports compact layouts where board area is limited, although its exposed thermal pad and fine-pitch assembly requirements require careful PCB design. The comparator output architecture is open collector, so an external pull-up resistor is generally required to establish a high output level. The output transistor can sink current when the comparator condition is met, while the pull-up network determines the high-state voltage and rise time. This configuration is useful for wired-AND signal aggregation, but it also means that the output voltage, transition timing, and allowable sink current depend on the external resistor and load. The LM2903 family is designed for operation from a single supply or split supplies, making it appropriate for systems that require comparison of signals referenced to ground or signals that exceed ground when both positive and negative rails are available. Because the exact electrical limits, common-mode range, output timing, and automotive qualification details are not shown in the retrieved product summaries, final circuit design should use the manufacturer datasheet and its recommended operating conditions. A compact application should include local input filtering when sensor leads are long or noisy, a defined output pull-up, and adequate copper around the exposed pad when both channels operate continuously. The small DFN package can reduce board space, but its compact size does not eliminate thermal or assembly constraints. Use the manufacturer pin configuration and land pattern when assigning inputs, outputs, supply pins, and the exposed pad. This page combines the LM2903Q2T product identity, verified manufacturer and distributor references, application guidance, package considerations, and design notes. It also explains why open-collector operation, power-supply topology, output pull-up design, and thermal layout determine whether the comparator works reliably in a real system.

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LM2903QDG4

LM2903QDG4 - Dual Differential Comparator, 36 V | Texas Instruments

The Texas Instruments LM2903QDG4 is a dual differential comparator containing two independent comparison channels, operating from a single 2 V to 36 V supply or dual supplies whose total voltage spans 2 V to 36 V. The device accepts differential input voltage and uses open-collector outputs compatible with TTL, CMOS, and MOS logic. It is packaged for surface-mount assembly in an 8-pin SOIC package. A differential comparator is an analog interface integrated circuit that compares two input voltages and changes its output state according to their relative polarity. The LM2903 belongs to the comparator hierarchy within analog and mixed-signal integrated circuits, where it bridges low-level sensor or signal voltages to a digital logic domain. Each half of the device can operate independently, allowing two comparisons in one package when the power supplies and input signals share a suitable common range. The principal features are dual independent comparators, a wide 2 V to 36 V operating range, open-collector outputs, and logic compatibility with TTL, CMOS, and MOS devices. The open-collector architecture gives the output a defined pulled-up state when the output transistor is off and allows multiple open-collector outputs to share a wired bus when suitable, provided each output has its own pull-up path. The operating-temperature grade extends from -40 °C to 125 °C for industrial temperature conditions. Each comparator uses a differential input stage and an open-collector output stage. A positive differential input produces the corresponding output state, while the magnitude and polarity of the differential input determine switching behavior. Because the outputs are open collector, external pull-up resistors are required for normal TTL or CMOS-compatible operation. The pull-up value controls rise time, power consumption, and susceptibility to bus capacitance, so it must be selected with the driven load and operating speed in mind. Typical uses include monitoring a sensor threshold, detecting overvoltage or undervoltage conditions, comparing an analog measurement with a reference, and providing an open-collector signal to a microcontroller or logic gate. The wide supply range is useful for industrial control systems, automotive-adjacent sensing circuits, power-supply monitoring, and test equipment where input signals may exceed conventional low-voltage logic rails. PCB layout should keep the exposed routes short and provide a stable ground reference close to the comparator. Place input and output components according to the manufacturer application guidance, and avoid routing high-current or switching-node copper directly beside the differential inputs. Pull-up resistors should connect to the intended logic supply rather than the comparator supply when separate output-interface voltage is required. This page combines the manufacturer's device information, package details, operating limits, direct drop-in candidates, comparison parameters, and practical implementation guidance. It also identifies which electrical details require confirmation in the LM2903 family datasheet before production release.

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LM2903QDGKRQ1

LM2903QDGKRQ1 - Dual 36V Automotive Comparator | Texas Instruments

The Texas Instruments LM2903QDGKRQ1 is an AEC-Q100 Grade 0 and Grade 1 automotive dual differential comparator with open-collector outputs, operating from 3 V to 36 V and supplied in an 8-pin VSSOP package. The device provides two independent comparison channels, a common supply range of 3 V to 36 V, and input common-mode operation extending to the supply rails. According to the TI LM2903-Q1 product page, the LM2903-Q1 family is designed for cost-sensitive automotive and industrial systems requiring high-voltage tolerant inputs and open-collector outputs. A comparator is an analog integrated circuit that evaluates two input voltages and produces a digital output indicating whether the non-inverting input is above or below the inverting input. Within the broader hierarchy, the LM2903-Q1 is a differential comparator, a general-purpose analog IC, and a member of the power-management and signal-conditioning semiconductor category. Its open-collector output structure allows several comparator outputs to be wired together for wired-AND operation and requires an external pull-up resistor for normal logic-level operation. Key characteristics include dual-channel operation, a 36 V maximum supply capability, and open-collector outputs suitable for automotive battery-powered systems. The AEC-Q100 Grade 0 and Grade 1 qualification supports demanding automotive environments, while the wide input voltage range reduces the need for separate input protection in many 12 V, 24 V, and 36 V system architectures. The 8-pin VSSOP package also supports compact PCB layouts where space is limited. The LM2903-Q1 architecture is designed for general-purpose threshold detection rather than high-speed waveform discrimination. Its differential input stage allows sensing of small analog changes, and the open-collector outputs can directly pull up a logic bus, drive a relay driver, or interface with automotive transceiver inputs. The open-collector configuration also provides wired-AND behavior when multiple comparator channels share a pull-up resistor. Typical applications include automotive battery monitoring, overvoltage and undervoltage detection, window or door sensing, sensor conditioning, and industrial control systems. In battery systems, the wide supply tolerance supports operation across load dump and automotive electrical-environment conditions when paired with appropriate protection. In control logic, two independent channels can monitor separate thresholds or implement a window comparator using external resistor networks. When designing the PCB, route the comparator inputs away from switching nodes and high-current return paths because input offset voltage can make nearby interference appear as a false state transition. Place the pull-up resistor close to the open-collector output and verify that its value keeps the logic rise time within the receiving device's limits. Automotive designs should also include the transient-protection components required by the complete vehicle electrical system rather than relying on the comparator alone for surge suppression. This page consolidates the verified package, voltage, output, qualification, and lifecycle information with application guidance, comparison parameters, and design notes that support faster component selection and PCB implementation.

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LM2903QDRG4Q1

LM2903QDRG4Q1 - Dual Comparator | Texas Instruments

Texas Instruments LM2903QDRG4Q1 is an automotive dual differential comparator containing two independent comparator channels, with an 8-SOIC package, a 2 V to 36 V supply-voltage range, open-collector outputs, and an operating-temperature range of -40°C to +125°C. The device supports single-supply operation and dual-supply operation when the supply difference and common-mode requirements are satisfied. A differential comparator is an analog integrated circuit that compares two input voltages and changes its output state when the non-inverting input exceeds the inverting input. The comparator category belongs to the broader amplifier IC and signal-conditioning hierarchy, where open-collector outputs are useful for wired logic, system-level signaling, and driving external pull-up networks. The LM2903-Q1 family combines independent channels with automotive qualification for applications requiring reliable operation across extended temperatures. Key electrical characteristics include a maximum input-offset voltage of 7 mV at 5 V, a maximum input-bias current of 0.25 µA, typical output current of 20 mA, and maximum quiescent current of 2.5 mA. Its differential architecture supports sensing whether one voltage is above or below another without requiring a feedback network. The open-collector output can sink current while remaining in a high-impedance state when the output transistor is off. The two channels operate independently, allowing one device to implement two threshold decisions, window-detection functions, or complementary monitoring functions. A supply range extending to 36 V is valuable in automotive and industrial systems where the comparator may be connected to protected battery-derived or higher-voltage signal rails. The low input-bias current helps reduce errors when sensing high-impedance sources, while the specified offset limit establishes the basic threshold-accuracy boundary. Typical applications include automotive battery and power-rail supervision, sensor threshold detection, overvoltage and undervoltage indication, window comparators, and digital-control interfaces. The open-collector architecture also allows multiple comparators to share a pull-up resistor when wired logic is acceptable. External pull-up selection must account for the required sink current, rise time, bus capacitance, and system-level fault conditions. Designers should account for input common-mode limits, supply polarity, output pull-up placement, and unused-channel handling. Place the pull-up resistor near the open-collector output or system bus, and verify that the 20 mA typical output-current capability covers the worst-case sink demand. The manufacturer datasheet and pin-description table remain the controlling references for connection, common-mode range, and package details. This product page combines manufacturer specifications, package information, drop-in replacement guidance, and practical application guidance. It supports faster component selection while preserving the electrical checks required for reliable comparator-based sensing and control systems.

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LM2903QDRQ1

LM2903QDRQ1 - 36V Automotive Dual Comparator | Texas Instruments

The Texas Instruments LM2903QDRQ1 is an AEC-Q100-qualified automotive dual differential comparator with two independent comparison channels, a 2 V to 36 V single-supply operating range, and open-collector outputs in an 8-pin SOIC package. It is designed for high-voltage industrial and automotive systems where two independent comparator channels are required in a compact package. A differential comparator is an analog integrated circuit that compares the voltage at its inverting input with the voltage at its non-inverting input and changes its output state when the input difference crosses a defined threshold. The comparator belongs to the broader hierarchy of analog ICs, signal-conditioning ICs, and semiconductor devices. Its open-collector architecture allows the output to be pulled up to a system-compatible logic voltage rather than being limited to the IC supply rail. Key electrical characteristics include a typical input offset voltage of 2 mV, a typical input bias current of 25 nA, and a supply current of 0.4 mA per comparator. Each channel provides one push-pull-compatible input stage and an open-collector output that is compatible with TTL, MOS, and CMOS logic families. The single-supply operating range is 2 V to 36 V, while operation from dual supplies is possible when the total supply difference is between 2 V and 36 V. The LM2903-Q1 family combines a wide supply range with low supply current and AEC-Q100 Grade 0 and Grade 1 options. These characteristics make it suitable for sensing circuits connected to higher-voltage buses than those commonly handled by low-voltage mixed-signal comparators. The open-collector outputs also simplify wired-interface and level-shifting arrangements when an external pull-up resistor is used. Typical applications include automotive battery and power-system monitoring, industrial control systems, motor and solenoid feedback circuits, window or lighting controllers, overcurrent and overvoltage detection, and general-purpose threshold sensing. Two channels in one package reduce board area when independent comparison functions are required. The main design consideration is the open-collector output. Every output requires a pull-up resistor to the desired logic rail, and the pull-up must be sized against the output sink current and expected switching rate. Designers should also verify the input common-mode range at the selected supply voltage before committing the circuit to automotive or industrial rail conditions.

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LM2903QPWRG4Q1

LM2903QPWRG4Q1 - Dual 36V Automotive Comparator | TI

The Texas Instruments LM2903QPWRG4Q1 is an AEC-Q100 Grade 0 and Grade 1 automotive dual differential comparator with an open-collector output configuration, housed in an 8-pin TSSOP package. The device operates from 2 V to 36 V on a single supply or from plus or minus 18 V on dual supplies, making it suitable for high-voltage industrial and automotive signal-conditioning systems. A differential comparator compares two input voltages and changes its output state according to the polarity of the difference between them. The LM2903-Q1 family contains two independent comparators, allowing one package to implement two threshold decisions, window monitoring functions, or independent protection channels. Its wide input and supply voltage ranges support battery-derived systems, industrial control boards, and 24 V vehicle electrical environments. The automotive-qualified LM2903QPWRG4Q1 provides low offset voltage, low supply current, low input bias current, 1.3 microsecond propagation delay, and improved 2 kV ESD performance. Its open-collector outputs allow wired-AND operation with an external pull-up resistor and permit the output voltage to be referenced independently of the internal supply. This makes the device practical for interfacing with logic gates, relay drivers, and systems requiring fail-safe output states. The LM2903-Q1 family is designed for drop-in convenience with established LM2903-family footprints, helping reduce redesign effort when automotive qualification and a 36 V maximum supply are required. The 8-pin TSSOP package supports compact surface-mount layouts, while the -40 C to +125 C operating range supports harsh industrial and vehicle environments. Typical uses include automotive battery monitoring, overvoltage and undervoltage detection, fan-speed control, sensor conditioning, power-supply supervision, and industrial control systems. The dual architecture also allows both halves to operate independently, although their input common-mode behavior and output pull-up network must be checked against the system requirements. When laying out the board, keep comparator inputs away from switching nodes and route the ground reference directly to the device ground pin. Choose the external output pull-up for the required logic family, account for the open-collector sink-current limit, and validate the design across the full temperature range. This page combines manufacturer specifications, package details, verified listing information, drop-in alternatives, and practical design guidance for faster component selection.

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LM2903QPWRQ1

LM2903QPWRQ1 - 36V Automotive Dual Comparator | Texas Instruments

The Texas Instruments LM2903QPWRQ1 is an AEC-Q100 Grade 0 and Grade 1 automotive dual differential comparator with an open-collector, rail-to-rail output configuration, supplied in an 8-pin TSSOP (PW) package. It operates from a single or dual supply across a wide range of supply voltages up to 36 V, consumes 0.4 mA typical per comparator, and is specified for temperatures from -40°C to 125°C. A comparator is an analog integrated circuit that evaluates two input voltages and produces a logic-level indication of their relationship. The LM2903-Q1 family belongs to the broader differential comparator and analog signal-conditioning hierarchy, where it sits between general-purpose analog front ends and downstream control logic such as system supervisors, motor controllers, and automotive ECUs. Its differential inputs allow small voltage differences to be resolved without converting the signal through an analog-to-digital converter. Key features include a 36 V maximum supply capability, low supply-current drain independent of supply voltage, 25 nA typical input bias current, and 3 nA typical input offset current. The open-collector outputs can sink current for wired-AND logic or drive external pull-up devices, while the dual differential architecture places two independent comparator channels in one package. Automotive Grade 0 and Grade 1 qualification supports use in demanding environmental conditions. The device supports single-supply or dual-supply operation and is designed for low-power threshold detection. Its wide supply range makes it suitable for systems that must monitor voltages well above conventional 5 V or 12 V rails, including vehicle battery systems and industrial control boards. The rail-to-rail open-collector output stage also allows the output to approach the negative supply during low-level input conditions. Typical applications include automotive battery and power-supply monitoring, overvoltage and undervoltage detection, motor and solenoid control, sensor conditioning, and window or lighting logic. It is also appropriate for industrial control systems requiring a comparator that can operate across a wide supply range without drawing supply current that changes significantly with voltage. When designing around the LM2903QPWRQ1, verify logic-level compatibility between the open-collector output and the connected microcontroller or system logic. Provide a suitable pull-up resistor at each output, keep input and output traces short, and place bypass capacitance close to the supply pins. Consider input common-mode limits carefully when signals exceed the supply rails. This page consolidates the manufacturer’s automotive qualification details, package information, comparator specifications, cross-reference candidates, and practical circuit guidance. It supports faster component selection by placing electrical limits, package compatibility, replacement considerations, and application guidance in one engineering-oriented reference.

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LM2903QS-13

LM2903QS-13 - 36V Dual Precision Comparator | Diodes Incorporated

The Diodes Incorporated LM2903QS-13 is a dual precision voltage comparator designed for operation from a single supply or split power supplies. Its headline ratings include a 36 V maximum supply voltage, 2 mV input offset voltage, 25 nA input bias current, 0.6 mA supply current, and 5 nA input offset current. The device is packaged in an 8-pin SOIC and is qualified to AEC-Q100 for automotive applications. A voltage comparator is an analog interface IC that evaluates two input voltages and switches its output when one input becomes higher than the other. Within the semiconductor hierarchy, a comparator belongs to the amplifier IC family, supports signal conditioning, and is frequently used to bridge low-level analog measurements to digital logic. The LM2903 contains two independent comparators, allowing one package to monitor two thresholds or perform two independent decisions. The low input offset and bias-current characteristics support precise threshold decisions when signals originate from sensors, dividers, or low-level analog stages. The common-mode input range includes ground, a useful property for single-supply systems whose signals remain near the lower rail. Open-collector outputs also allow the two channels to be connected together for wired-AND operation and permit external pull-up resistors to establish the logic-high voltage independently of the comparator supply. The LM2903 architecture emphasizes low power consumption and broad supply compatibility rather than high-speed comparator performance. According to the Diodes Incorporated datasheet, the series supports single-supply operation over a wide voltage range and split-supply operation as well. This makes it suitable for industrial, automotive, and embedded systems where a sensing element compares a variable voltage against a reference before driving a control, fault, or sequencing circuit. Typical applications include supply sequencing, battery and power-system threshold detection, sensor signal conditioning, window-comparator implementations, overvoltage and undervoltage protection, and general digital-logic interfacing. Two independent channels can implement a two-threshold system, compare two sensor signals, or provide one always-enabled channel and one conditionally monitored channel. The 8-pin SOIC footprint is convenient for conventional surface-mount assembly. The principal design consideration is the open-collector output. Each output requires a pull-up resistor to the appropriate logic supply, and the selected resistor must satisfy the output sink-current and rise-time requirements. Inputs should also remain within their specified common-mode and differential ranges, while supply decoupling should be placed close to the device to limit switching-induced disturbance. This product record combines the LM2903QS-13 electrical identity, automotive-grade package information, family-level replacement context, and application-focused design guidance. It helps engineers identify the correct SOIC-8 part, understand its threshold-measurement role, and compare it with same-footprint dual-comparator options before finalizing a PCB or BOM revision.

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LM2903S-13

LM2903S-13 - Dual 36V Differential Comparator | Diodes

Diodes Incorporated LM2903S-13 is a dual differential comparator in an 8-pin SOIC package, with a 36 V maximum supply rating, 20 mA output current capability, and 25 nA input bias current rating. It contains two independent comparators, allowing one package to provide two separately controlled threshold-detection or level-shifting channels. A differential comparator is an analog integrated circuit that compares two input voltages and changes its output state according to their relationship. Within the broader hierarchy of comparator IC, voltage comparator, analog IC, and semiconductor, the LM2903S-13 is intended for general-purpose signal conditioning, threshold detection, and logic-interface applications. Its dual-channel architecture improves board utilization while keeping the two channels electrically independent. Key features include a 36 V maximum total supply voltage, operation from a single supply or split supplies, and an input common-mode range that includes ground. The open-collector outputs are designed to interface with TTL, MOS, and CMOS logic. Each comparator can drive an external pull-up network, making the device useful when a wired-AND function or level translation is required. The stated 25 nA input bias current supports applications where input bias effects must be controlled. The LM2903 family uses an open-collector output architecture rather than a push-pull or rail-to-rail CMOS output. When the output transistor is off, the output voltage is set by the pull-up resistor and its connected supply. When the output transistor is on, the output approaches ground while remaining within the device's output-current capability. This architecture provides flexibility in interface voltage, but it also requires an external pull-up resistor and suitable attention to pull-up current. Typical applications include two-threshold monitoring, zero-cross detection, sensor-signal conditioning, relay or solenoid drive interfaces, window comparators, and general digital logic level translation. The device can also support dual-polarity sensing when powered from split supplies. Its 8-pin SOIC package is convenient for conventional through-hole assembly and hand rework, although modern high-density designs may prefer a smaller surface-mount package when one is qualified. For reliable operation, keep the total supply voltage within the 36 V rating and observe the absolute maximum input and output limits listed in the manufacturer datasheet. Place the pull-up resistor close to the output net, maintain a continuous ground return, and account for the open-collector output's rise time, which is determined by output capacitance and pull-up resistance rather than by a dedicated push-pull driver. This product page combines the LM2903S-13 device identity, package details, manufacturer-family information, sourcing references, pin-compatible alternatives, and application-oriented design guidance. It is structured to help engineers evaluate the comparator electrically before deciding whether the 8-pin SOIC implementation matches the assembly, protection, interface, and lifecycle requirements of the target design.

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LM2903TH-13

LM2903TH-13 Dual Differential Comparator | Diodes

Diodes Incorporated LM2903TH-13 is a dual differential comparator designed for general-purpose analog signal comparison, with two independent comparator channels and an 8-pin TSSOP package. The device operates from 2 V to 36 V, accepts input voltages spanning approximately ±18 V in the dual-supply configuration, and provides a maximum input offset voltage of 7 mV. These characteristics position it for industrial control, sensor interfacing, voltage-threshold detection, and general analog decision-making circuits. A comparator is an analog integrated circuit that compares two input voltages and produces a logic-level output indicating which input is higher. A differential comparator evaluates the voltage difference between its inverting and non-inverting inputs. This function is placed within the hierarchy of comparator integrated circuits, analog signal-processing ICs, semiconductor devices, and electronic control systems. Unlike a general-purpose operational amplifier used primarily for linear amplification, a comparator is optimized for fast, decisive output-state transitions. The LM2903 family provides two channels in one package, reducing component count and PCB space in dual-threshold applications. Its 2 V to 36 V supply capability supports operation from low-voltage analog systems through substantially higher industrial voltage ranges. The 7 mV maximum input offset specification limits the input difference that can be recognized as a deliberate transition, making the device suitable for threshold monitoring when board-level signal integrity and input conditioning are properly controlled. The dual differential architecture allows two independent comparisons within one IC. Each channel can monitor a sensor signal against a reference, supervise a supply rail, or establish an upper and lower control boundary. Its wide operating-voltage range is especially useful where input signals may exceed the nominal supply of a low-voltage controller. The 8-TSSOP package also supports compact surface-mount layouts, although thermal performance and unused-channel handling remain important design considerations. Typical uses include industrial motor-control logic, power-supply supervision, temperature-sensor interfaces, battery monitoring, overvoltage detection, and general-purpose threshold switching. For dual-polarity sensing, the comparator can operate from single or dual supplies. For a single-supply design, the output reference and input signal levels must remain compatible with the supply voltage and the logic thresholds of the following digital device. PCB design should keep sensitive comparison inputs away from switching nodes and high-current return paths. Place input-referenced components close to the corresponding pins, maintain a stable ground reference, and account for input bias current when using high-source-impedance sensors. If only one comparator channel is required, verify the manufacturer's guidance for the unused channel so that it does not introduce unstable behavior or excess switching activity. This product page combines the LM2903TH-13 identification, package information, technical specifications, sourcing workflow, verified drop-in alternatives, and practical comparison guidance. It is intended to help engineers determine whether the dual comparator's voltage range, offset limit, pin compatibility, and surface-mount format match a specific analog-control design.

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Subcategorías

Productos (39.000+)

LM2903DRG3 - Dual Open-Collector Comparator | Texas Instruments

LM2903DRG4 - Dual 30V Open-Collector Comparator | Texas Instruments

LM2903EPWRQ1 - Automotive Dual Comparator | Texas Instruments

LM2903FVJ-E2 - Dual Ground-Sense Comparator | ROHM Semiconductor

LM2903FVT-E2 Dual Ground-Sense Comparator | ROHM

LM2903HD - Dual 36V Open-Collector Comparator | STMicroelectronics

LM2903ITLX/NOPB - Dual Low-Power Open-Collector Comparator, 8-DSBGA

LM2903M - Dual Differential Comparator | Texas Instruments

LM2903M8-13 - Dual 36V Comparator | Diodes Incorporated

LM2903MX - Dual Differential Comparator | Texas Instruments

LM2903MX/NOPB - Dual Open-Collector Comparator | Texas Instruments

LM2903N - Dual Voltage Comparator, Open-Collector, 8-DIP | TI/STMicro/onsemi

LM2903P - Dual Differential Comparator, 30 V, PDIP-8 | Texas Instruments

LM2903PT - Dual Low-Power Voltage Comparator, +2V to +36V | STMicroelectronics

LM2903Q2T - Dual Low-Power Voltage Comparator | STMicroelectronics

LM2903QDG4 - Dual Differential Comparator, 36 V | Texas Instruments

LM2903QDGKRQ1 - Dual 36V Automotive Comparator | Texas Instruments

LM2903QDRG4Q1 - Dual Comparator | Texas Instruments

LM2903QDRQ1 - 36V Automotive Dual Comparator | Texas Instruments

LM2903QPWRG4Q1 - Dual 36V Automotive Comparator | TI

LM2903QPWRQ1 - 36V Automotive Dual Comparator | Texas Instruments

LM2903QS-13 - 36V Dual Precision Comparator | Diodes Incorporated

LM2903S-13 - Dual 36V Differential Comparator | Diodes

LM2903TH-13 Dual Differential Comparator | Diodes