Texas Instruments LM2903PSRG4

Overview

LM2903PSRG4 from Texas Instruments is a dual precision 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, 1 µs propagation delay, and rail-to-rail input capability including ground. It serves as the output stage in overvoltage protection circuits, battery monitoring systems, and industrial sensor interface modules.

For engineers reviewing the LM2903PSRG4 datasheet, LM2903PSRG4 pinout, LM2903PSRG4 application, or LM2903PSRG4 equivalent, this page delivers verified electrical specifications, package-validated pin functions, real-world use scenarios, and two confirmed alternative parts with documented functional and thermal differences for design-in decisions.

Technical Context

The LM2903PSRG4 implements an open-collector output architecture with independent dual comparators, enabling flexible pull-up configurations and direct interfacing with TTL, MOS, and CMOS logic families. Its input stage supports common-mode voltages down to ground and up to VCC – 2 V, with differential input range extended to ±38 V for robust signal conditioning in noisy environments.

Designed as the B-version upgrade of the legacy LM2903, it integrates dedicated ESD clamps delivering 2 kV HBM rating and maintains full drop-in compatibility with LM2903, LM2903V, and LM2903AV across SOIC-8 (PS) packaging - preserving PCB layout while improving offset, speed, and supply current performance.

Key Specifications

Pinout & Package

LM2903PSRG4 is housed in an 8-pin SOIC (PS) package measuring 4.90 mm × 3.91 mm, with gull-wing leads and surface-mount compatibility. Thermal performance is characterized by RθJA = 148.5°C/W, supporting operation up to +125°C ambient when mounted on standard FR-4 PCBs with moderate copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2903PSRG4, LM2903DR trades precision and speed for cost, while TLV1702IDR replaces open-collector flexibility with integrated push-pull convenience and lower quiescent current - each serving distinct architectural priorities in industrial signal conditioning.

Availability

LM2903PSRG4 is available at Aetrix Electronics and suitable for industrial motor drives, server power supply protection, and battery management systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for LM2903PSRG4 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 chain and power management solutions.

The LM2903B series - including LM2903PSRG4 - was developed to modernize the industry-standard dual comparator family with improved offset, speed, ESD robustness, and temperature range while maintaining full backward compatibility for industrial and automotive-qualified designs.

FAQ

What is the maximum supply voltage rating for LM2903PSRG4?

The LM2903PSRG4 supports a maximum supply voltage of 36 V, with absolute maximum ratings extending to 38 V for short-duration transients. This exceeds legacy LM2903 variants (rated to 32 V), enabling direct use in 24 V and 32 V industrial systems without derating. The device maintains specified performance across its full 2 V to 36 V operating range, including stable quiescent current and propagation delay behavior.

Does LM2903PSRG4 require dual power supplies?

No, LM2903PSRG4 operates from a single supply ranging from 2 V to 36 V. Its input common-mode range includes ground and extends to VCC – 2 V, eliminating the need for negative rails. This simplifies power architecture in battery-powered sensors and 3.3 V/5 V microcontroller systems where generating a negative supply is impractical or inefficient.

Can LM2903PSRG4 drive a 5 V logic input directly?

Yes - LM2903PSRG4's open-collector outputs can interface directly with 5 V TTL or CMOS inputs when paired with an appropriate pull-up resistor (e.g., 4.7 kΩ to 5 V). The output sinks up to 21 mA while maintaining VOL ≤ 400 mV at 4 mA, ensuring valid LOW-level recognition. No level-shifter or buffer is required for standard logic families.

How does the ESD performance of LM2903PSRG4 compare to older LM2903 versions?

LM2903PSRG4 features 2 kV HBM ESD rating - identical to legacy LM2903 but achieved via enhanced internal clamps rather than process-only hardening. Unlike earlier versions, the B-series incorporates dedicated ESD protection structures that maintain performance integrity after repeated discharges, reducing field failure risk in assembly and deployment environments without requiring additional board-level protection.

Is LM2903PSRG4 pin-compatible with LM2903P?

Yes - LM2903PSRG4 uses the same SOIC-8 (PS) package footprint and identical pinout as LM2903P and LM2903V. All electrical connections - including VCC, GND, both inputs, and both outputs - map one-to-one. No PCB redesign or layout changes are needed when upgrading from legacy LM2903 variants to LM2903PSRG4, preserving mechanical and routing compatibility while delivering improved electrical specs.