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LM2903DE4

LM2903DE4 - Dual 36V Open-Collector Comparator | Texas Instruments

Texas Instruments LM2903DE4 is a dual differential comparator built for general-purpose signal conditioning and threshold detection. The device contains two independent comparators, supports a 2 V to 36 V single-supply operating range, and provides open-collector outputs in an 8-pin SOIC package. Its 300 ns response time makes it suitable for systems that require faster decisions than the related LM393B family while retaining the familiar open-collector interface. A comparator is an analog integrated circuit that compares two input voltages and produces a digital logic state indicating which input is higher. Within the broader hierarchy of interface ICs, comparators extend analog signal conditioning into threshold control, protection, sensing, and discrete logic activation. The LM2903DE4 is specifically a dual differential comparator: each half can independently compare an inverting input with a non-inverting input while sharing common supply and ground connections. The principal features include two independent channels, a 2 V to 36 V supply range, an approximately 300 ns response time, and open-collector outputs compatible with TTL, MOS, and CMOS circuits. The common-mode input range includes ground, and the differential input range is equal to the maximum-rated supply voltage of ±38 V for the family. Each output can sink external current while remaining in a high-impedance state when inactive, requiring an external pull-up resistor for normal logic-high operation. Differential comparison is especially useful when a sensor or signal source is referenced to another voltage rather than to ground. By placing the threshold on the non-inverting input and the sensed signal on the inverting input, the comparator can provide overvoltage, undervoltage, temperature, current, or level detection. Because the channels are independent, the same package can implement two thresholds, compare two unrelated signals, or combine two decisions locally. Typical applications include industrial sensor interfaces, overvoltage and reverse-polarity protection, window comparators, motor and relay control, power-supply supervision, and embedded control systems. The open-collector outputs are particularly useful for wired-AND arrangements, relay-driver interfaces, and level translation because the output stage can remain disconnected while an external pull-up establishes the logic-high voltage. The principal design consideration is the open-collector output. Place each pull-up resistor close to the relevant output and select it to balance rise time against sink-current demand. Also check input common-mode limits, supply operating range, output leakage, and the timing relationship between the reference voltage and sensed signal before using the comparator for high-speed pulse detection. This page consolidates the manufacturer specifications, package and pin information, orderable alternatives, comparison data, and practical application guidance into a design-focused reference for engineers evaluating the LM2903DE4.

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LM2903DG4

LM2903DG4 - Dual Open-Collector Comparator | Texas Instruments

The Texas Instruments LM2903DG4 is a dual differential comparator containing two independent comparator channels, an open-collector output configuration, and an 8-pin SOIC package. The device supports single-supply or dual-supply operation, with a maximum-rated supply voltage of 32 V and a tested differential input voltage of 30 V. Its low supply-current drain of 0.4 mA typical per comparator is independent of supply voltage, making it suitable for power-conscious industrial and embedded systems. A comparator is an analog integrated circuit that evaluates two input voltages and produces a digital logic state indicating which input is higher. The LM2903 is a dual differential comparator, placing two independent comparator channels in one package. Within the broader semiconductor hierarchy, it is a comparator, analog IC, and interface/amplifier-class signal-conditioning component used to translate small analog voltage relationships into logic-compatible decisions. Each LM2903 channel supports operation from a single supply or from dual supplies. The open-collector outputs can sink output current while presenting a high-impedance state when the output is inactive. According to the Texas Instruments LM2903 product information, the outputs are compatible with TTL, MOS, and CMOS logic. This makes the device useful when an external pull-up resistor is required to establish the inactive output voltage. The two channels are electrically independent, allowing one comparator to monitor a control threshold while the other handles a second signal, alarm, or protection event. Common-mode input voltage range includes ground, and the differential input rating equals the maximum-rated supply voltage. These characteristics support sensing arrangements in which signals may approach the lower supply rail, subject to the limits stated in the manufacturer datasheet. Typical applications include overvoltage and undervoltage detection, industrial sensor interfaces, battery monitoring, window or threshold detection, relay-control logic, and general-purpose signal conditioning. The wide supply range also makes the device useful in 5 V, 12 V, and 24 V industrial systems when the relevant operating limits are observed. Designers should account for open-collector pull-up requirements, input common-mode limits, output sink-current capability, and unused-channel handling. A pull-up resistor must be selected to establish a valid logic-high voltage without exceeding the device's output-current limits. Input filtering may also be required when noisy signals could cause repeated transitions near the comparison threshold. This page combines manufacturer identification, package details, cross-reference information, and engineering guidance for threshold detection and open-collector interface design. It also highlights the operating conditions that should be checked before using a substitute or family variant on an existing board.

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LM2903DGKRG4

LM2903DGKRG4 - 36V Dual Comparator | Texas Instruments

Texas Instruments LM2903DGKRG4 is a dual differential comparator containing two independent voltage comparators, with a 2 V to 36 V supply range, approximately 300 ns response time, and an 8-pin VSSOP package. Both channels use open-collector outputs, allowing wired logic or use with an external pull-up resistor. The part supports single-supply operation and dual-supply operation when the total supply span is 2 V to 36 V. A voltage comparator is an analog interface that compares two input voltages and produces a logic-level indication of their relationship. The LM2903 belongs to the comparator hierarchy, where a comparator is an analog IC used for threshold detection, signal conditioning, and protection. Its two independent channels can monitor separate control, sensing, or feedback signals, while its open-collector architecture provides flexible interface voltage selection. The principal operating characteristics include a 2 V to 36 V supply range, approximately 300 ns propagation delay, and low supply-current drain of 0.4 mA typical per comparator. Its rail-to-rail input capability allows the input common-mode range to extend toward the supply rails. Open-collector outputs can sink output current while leaving the effective pull-up voltage under the system designer’s control, making the device useful in wired-AND, wired-OR, and level-shifting arrangements. Each channel has one inverting input, one non-inverting input, one output, and access to the supply and ground rails. Because the two comparators are independent, each channel can be configured for a different threshold or polarity. Input offset, input bias current, output saturation characteristics, and detailed common-mode behavior should be checked against the manufacturer datasheet for each operating condition, particularly when sensing near a supply rail. Typical uses include industrial control systems, battery-powered equipment, power-supply sequencing, overvoltage and undervoltage monitoring, sensor-threshold conditioning, and general-purpose logic interfaces. The wide supply range accommodates multiple industrial and automotive-style voltage environments, while the low typical supply-current drain is advantageous in portable systems. An open-collector output also allows multiple comparators to share a pull-up node when wired logic is required. The primary design consideration is the open-collector output. Every output requires a suitable pull-up resistor and account for sink-current limits, rise time, bus capacitance, and the logic threshold of the receiving device. Input filtering may also be necessary when noisy analog signals are compared, while board placement should keep comparison inputs away from switching nodes and high-current return paths. This page combines the exact ordering designation with package, pin, application, and drop-in replacement guidance to support schematic review and PCB reuse. It also provides practical design notes for pull-up selection, input conditioning, and open-collector interfacing, helping engineers evaluate the LM2903 family beyond a basic datasheet parameter summary.

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LM2903DMR2

LM2903DMR2 - Dual Precision Comparator, 36 V | onsemi

onsemi LM2903DMR2 is a dual independent precision voltage comparator designed for single-supply or split-supply operation, with a supply range extending to 36 V and an 8-pin SOIC package. The device compares two input voltages per channel and provides an open-collector output suitable for wired logic-level comparison and system monitoring. A voltage comparator is an analog integrated circuit that evaluates two input voltages and changes its output state according to their relationship. The LM2903 belongs to the comparator hierarchy within analog signal-processing and interface ICs. Its two independent channels allow a single package to monitor two unrelated signals, while single- or split-supply operation makes it useful across industrial, automotive, and embedded power-control systems. The LM2903 series provides a common-mode input range that extends to ground under single-supply operation. This characteristic is important when a monitored signal can approach 0 V. The low-offset-voltage designation indicates that the comparators are intended to detect relatively small differential voltages, although the exact offset limits depend on the operating conditions specified in the onsemi datasheet. Each channel operates independently, allowing different threshold networks and signal pairs to share the package. The device supports supply voltages up to 36 V, which provides headroom for industrial and automotive environments. Its comparator outputs are designed for interfacing with conventional logic, although output topology, sink-current limits, and pull-up requirements must be confirmed from the manufacturer datasheet before final circuit design. Typical uses include power-supply sequencing, battery and charger threshold detection, overvoltage and undervoltage protection, window monitoring, sensor-level detection, and general signal conditioning. In a power system, the two channels can monitor independent rails or compare a feedback voltage against a reference. The open-collector-style interface also allows multiple devices to share a pull-up arrangement when the required bus architecture and current limits are appropriate. When laying out the circuit, keep comparator input nodes short and shield them from switching nodes and high-current paths. Confirm whether the selected output configuration requires an external pull-up resistor, and use that resistor to satisfy the downstream logic's rise-time requirements. Check supply-decoupling placement at the device pins and verify input and output limits for the complete temperature range. This product record combines the LM2903DMR2 electrical description, verified source links, same-package alternatives, application guidance, and design checks to support faster component selection and PCB-level engineering decisions.

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LM2903DR

LM2903DR - Dual Open-Collector Comparator | Texas Instruments (Tape & Reel)

The Texas Instruments LM2903DR is a dual differential analog comparator with two independent comparator channels, an operating supply range of 2 V to 36 V, a response time of 300 ns, and an 8-pin SOIC package. Each channel provides open-collector output behavior for level translation, relay driving, and wired-AND logic functions. The device is specified for operation from -40 °C to +125 °C according to the available manufacturer comparison data. An analog comparator is an integrated circuit that compares two input voltages and produces a logic-level output indicating which input is higher. The LM2903DR belongs to the comparator hierarchy within analog and mixed-signal semiconductors, providing a simple alternative to an operational amplifier configured as a comparator. Its two channels operate independently, allowing one package to implement two threshold decisions or to control complementary functions in a single circuit. The open-collector outputs are a defining electrical feature. Each output transistor can pull its output low, but it cannot actively drive the output high, so an external pull-up resistor is required. Multiple open-collector outputs can share one pull-up to create a wired-AND arrangement. This architecture also provides a useful form of output isolation while remaining compatible with standard 5 V and 3.3 V digital logic levels when the pull-up rail is selected appropriately. The 2 V to 36 V supply capability allows operation from low-voltage analog systems through conventional industrial control rails. Its 300 ns response time supports applications where decisions must be made faster than typical slow comparators but where nanosecond-level precision is unnecessary. The operating temperature range covers industrial environments, although production designs should still verify temperature-dependent input offset, output-current, and propagation-delay behavior using the selected manufacturer's complete datasheet. Typical uses include industrial sensor conditioning, battery monitoring, overvoltage detection, window or level comparators, relay and solenoid interfaces, and digital control systems that require open-collector outputs. The SOIC-8 package is also appropriate for through-hole-style PCB assembly and manual rework, although SOIC-8 is larger than modern comparator packages such as SOT-23 and MSOP-8 variants. When designing with the LM2903DR, always place the input and pull-up networks close to their associated pins, and account for input common-mode limits at the selected supply voltage. A pull-up resistor is not optional because the open-collector output cannot source current. Reviewing the voltage drop across the pull-up and the output transistor's current rating is essential when several outputs share the same node. This page consolidates verified distributor listings, manufacturer references, pin-compatible alternatives, package details, and practical circuit guidance. It also distinguishes directly interchangeable devices from higher-speed or higher-precision alternatives whose electrical behavior may require different design assumptions.

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LM2903DR2

LM2903DR2 - Dual 36 V Comparator | onsemi | SOIC-8

onsemi LM2903DR2 is a dual differential voltage comparator designed for single-supply or split-supply operation between 2 V and 36 V. The device contains two independent comparison channels, supports a common-mode input range extending to ground in single-supply systems, and is packaged in an 8-pin SOIC. Its open-collector output architecture provides flexible interface options for wired logic, pull-up networks, relay drivers, and systems operating from multiple supply rails. A voltage comparator is an analog integrated circuit that compares two input voltages and produces a logic-level indication of their relationship. The LM2903 belongs to the comparator hierarchy within analog and mixed-signal semiconductors, where its primary role is threshold detection rather than linear amplification. Two independent channels allow one package to implement two unrelated sensing functions while sharing a common supply connection and ground reference. The LM2903 series combines low input-offset voltage, low input-bias current, and a wide supply-voltage range. Input offset voltage is specified as low as 2.0 mV, which helps define the input-voltage difference required to change output state. The 2 V to 36 V operating range supports legacy 5 V logic, industrial 12 V and 24 V rails, automotive-style 12 V systems, and higher-voltage threshold-detection circuits. The open-collector outputs permit an external pull-up voltage to be selected independently of the comparator supply. Each channel compares a non-inverting input with an inverting input. When the non-inverting voltage is higher, the corresponding open-collector output transistor turns on and pulls the output toward the pull-up rail; when the inverting voltage is higher, the transistor turns off and the output rises. The two channels are independent, although their supply and ground pins are shared. This arrangement supports sensor thresholding, window detection, and complementary decisions without requiring two separate packages. Typical uses include industrial control and factory automation, battery-powered monitoring, automotive battery and power-system detection, instrumentation, protection circuits, and embedded systems using 3.3 V or 5 V microcontroller interfaces. For digital interfaces, the open-collector output can use a pull-up to the logic rail used by a comparator input or microcontroller. The SOIC-8 package also supports conventional surface-mount assembly and hand-soldering workflows. Designers should verify the allowable input and output voltage relationships, including the differential input range, and use a pull-up resistor that supplies adequate output current without exceeding the output transistor's limits. Care is also needed when a channel drives a cable, relay, or large capacitance because slower edges and parasitic coupling can affect system behavior. The input network should include suitable filtering when the sensed signal contains switching noise. This product overview combines the exact LM2903DR2 ordering identity with practical guidance on comparator operation, pin usage, output interfacing, and verified drop-in options. It is intended to support component selection, PCB replacement, and design reviews involving dual open-collector comparators in SOIC-8 packages.

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LM2903DR2G

LM2903DR2G - Dual 36V Open-Collector Comparator | onsemi

onsemi LM2903DR2G is a dual differential voltage comparator with two independent comparator channels, 2 V to 36 V supply operation, open-collector outputs, 1.5 µs propagation delay, and an 8-pin SOIC package. The device also supports split-supply operation with stated rails from ±1 V to ±18 V and an input offset voltage as low as 2.0 mV. A dual comparator is a semiconductor that evaluates two input voltages and changes its output state according to their relationship. The LM2903 belongs to the broader voltage-comparator hierarchy within analog integrated circuits and power-management signal conditioning. Its two independent channels allow simultaneous or separate threshold, window, sensing, and level-detection functions without requiring two separate comparator packages. Key features include two open-collector channels, a 1.5 µs response time, and low-offset operation with input offset voltage specifications as low as 2.0 mV. The 2 V to 36 V total supply range supports industrial, automotive-style, and embedded applications where the comparator may operate from a single supply or from positive and negative rails. Open-collector outputs permit external pull-up selection and can interface with TTL, MOS, or CMOS-compatible systems when the pull-up voltage and current are appropriate. The comparator architecture is appropriate when a design needs a digital decision rather than a linear analog output. Each channel can compare a sensed voltage against a reference threshold, while the open-collector structure allows wired logic, alarm signaling, or direct control of a pull-up-equipped input. Operation from single or split supplies expands its usefulness in power systems that use both positive and negative reference rails. Typical applications include automotive battery and power-rail monitoring, industrial control thresholds, motor and actuator interfaces, sensor conditioning, overvoltage and undervoltage detection, and embedded system supervision. The 8-SOIC package provides a conventional surface-mount footprint, while the dual-channel configuration helps reduce component count in dual-threshold or multi-channel sensing designs. Designers should verify input common-mode limits, output pull-up values, differential input limits, and the exact electrical grade associated with the selected ordering code. Keep output pull-up paths short, provide adequate return-current routing, and account for the open-collector output’s tendency to sink current rather than source it. The Request a Quote form on this page supports current commercial sourcing questions. This page organizes the LM2903DR2G electrical characteristics, package information, drop-in candidates, comparison parameters, and practical circuit-placement guidance. It also identifies which ordering variants are technically suitable for footprint reuse and where direct replacement requires additional engineering review.

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LM2903DRE4

LM2903DRE4 - Dual 2-36V Comparator | Texas Instruments

Texas Instruments LM2903DRE4 is a dual differential voltage comparator with open-collector outputs, rail-to-rail input capability, a 2 V to 36 V supply range, and an 8-pin SOIC package. Each channel can operate independently, making the device suitable for threshold detection, level translation, window monitoring, and industrial control tasks. A voltage comparator is an analog semiconductor that compares two input voltages and changes its output state when one input crosses the other. A dual comparator contains two electrically independent comparator channels in one package. The LM2903 belongs to the voltage comparator hierarchy, where it can be described more specifically as a differential comparator with open-collector outputs. It operates from a single supply or from split supplies, making it suitable for industrial power systems with widely separated ground references. The principal advantages of the LM2903DRE4 are its broad 2 V to 36 V operating supply range, rail-to-rail input characteristic, low typical supply-current drain of 0.4 mA per comparator, and 300 ns response time. The two open-collector outputs allow the output state to be pulled up to an external voltage and provide wired-AND behavior when several comparators share a pull-up resistor. This output arrangement is useful when interfacing with open-drain logic, relay drivers, or subsequent CMOS and TTL stages. Each comparator contains independent input and output circuitry. Differential input voltage is evaluated between the inverting and noninverting inputs, and the output transistor is turned off or on according to that relationship and the polarity of the open-collector stage. Because the outputs are open collector, the output voltage depends on the pull-up network rather than the comparator alone. Designers must account for leakage current, pull-up resistance, logic thresholds, and propagation delay when translating a high-impedance output state into a valid digital level. Typical uses include industrial sensor thresholds, battery and power-supply monitoring, overvoltage detection, motor-control signaling, and general-purpose logic interfacing. A split-supply arrangement can compare bipolar signals around ground, while a single-supply arrangement supports systems whose input common-mode range reaches the lower supply rail. The 8-pin SOIC package also supports conventional surface-mount assembly and easy routing between two comparator channels. A key design consideration is that open-collector outputs require an external pull-up resistor. Select that resistor so that its maximum current and the output leakage current still produce a valid high level, while keeping rise time consistent with the required system response. The 300 ns propagation delay is important for high-speed threshold decisions, but slower pull-up networks can add additional delay after the comparator changes state. This page combines manufacturer and distributor information with package guidance, application analysis, cross-brand substitution notes, and engineering-focused design advice to help evaluate the LM2903DRE4 beyond a basic catalog listing.

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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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製品 (39,000+)

LM2903DE4 - Dual 36V Open-Collector Comparator | Texas Instruments

LM2903DG4 - Dual Open-Collector Comparator | Texas Instruments

LM2903DGKRG4 - 36V Dual Comparator | Texas Instruments

LM2903DMR2 - Dual Precision Comparator, 36 V | onsemi

LM2903DR - Dual Open-Collector Comparator | Texas Instruments (Tape & Reel)

LM2903DR2 - Dual 36 V Comparator | onsemi | SOIC-8

LM2903DR2G - Dual 36V Open-Collector Comparator | onsemi

LM2903DRE4 - Dual 2-36V Comparator | Texas Instruments

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