Texas Instruments LM2903PWR

Overview

LM2903PWR from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, and 1 µs propagation delay. It serves as a precision threshold detector in power supply monitoring, motor control feedback, and industrial sensor interfaces.

For engineers reviewing the LM2903PWR datasheet, LM2903PWR pinout, LM2903PWR application, or LM2903PWR equivalent, key selection criteria include its rail-to-rail input capability (common-mode range includes ground), open-collector outputs compatible with TTL/MOS/CMOS, and extended –40°C to +125°C operating temperature range suitable for automotive and industrial environments.

Technical Context

The LM2903PWR implements two independent comparators with internal ESD clamps delivering 2 kV HBM robustness. Its input stage supports common-mode voltages down to ground and up to VCC – 2 V, while differential input tolerance extends to ±38 V - exceeding standard 36 V supply rails.

Output stages are open-collector NPN transistors capable of sinking up to 21 mA per channel at 5 V supply, with low saturation voltage (110–400 mV at 4 mA) and high-level leakage under 20 nA at 5 V - enabling direct interfacing with pull-up networks across logic families.

Key Specifications

Pinout & Package

LM2903PWR is packaged in an 8-pin TSSOP (PW) with 3.00 mm × 4.40 mm body size and exposed thermal pad connected to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual comparator applications.

Compared with LM2903DT and LM393BDR, the LM2903PWR uniquely balances compact TSSOP packaging, full automotive temperature range, and B-version performance - making it optimal for space-constrained, thermally demanding embedded systems requiring long-term reliability.

Availability

LM2903PWR is available at Aetrix Electronics and suitable for server PSU monitoring, BLDC motor control, and industrial sensor interface applications requiring stable component supply across extended temperature and voltage ranges.

Supply support for LM2903PWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and power management ICs.

The LM2903B family - including LM2903PWR - was engineered to replace legacy LM2903 variants with enhanced offset, speed, ESD, and temperature performance while maintaining full pin and functional compatibility for drop-in upgrades in industrial and automotive systems.

FAQ

What is the maximum supply voltage rating for LM2903PWR?

The LM2903PWR has an absolute maximum supply voltage rating of 36 V, with recommended operation up to 36 V. Its B-version design also supports differential input voltages up to ±38 V - exceeding the supply rail - enabling robust operation in noisy or mismatched reference environments. This rating is confirmed in Section 5.1 of the official TI datasheet SLCS005AH.

Does LM2903PWR support rail-to-rail input operation?

Yes, LM2903PWR supports rail-to-rail input common-mode voltage range, including ground (V–) and extending up to VCC – 2 V. This allows direct connection of sensors or signals referenced to system ground without level-shifting circuitry. The specification is validated across –40°C to +125°C and appears in Section 5.6 Electrical Characteristics for LM2903B.

What is the typical propagation delay of LM2903PWR at 5 V supply?

The LM2903PWR exhibits a typical propagation delay of 1 µs under standard test conditions (VS = 5 V, VO_PULLUP = 5 V, CL = 15 pF, RL = 5.1 kΩ, TA = 25°C). This value is specified in Section 5.7 Switching Characteristics and applies to both high-to-low and low-to-high transitions with small-signal overdrive.

Can LM2903PWR drive a 10 kΩ pull-up resistor directly?

Yes, LM2903PWR can reliably drive a 10 kΩ pull-up resistor. With its open-collector output capable of sinking ≥6 mA at VOL ≤ 400 mV (Section 5.6), a 10 kΩ pull-up to 5 V yields ~0.5 mA load - well within spec. Output voltage remains below 200 mV under this condition, ensuring clean TTL/CMOS logic low levels across temperature.

Is LM2903PWR pin-compatible with legacy LM2903 variants?

Yes, LM2903PWR is pin-compatible with standard LM2903 devices in TSSOP-8 (PW) package. It maintains identical pinout, electrical behavior, and footprint as non-B versions - enabling drop-in replacement without PCB changes. This compatibility is explicitly stated in the "B-version is drop-in replacement" feature list and confirmed in Table 4-1 Pin Functions of the datasheet.