onsemi LM2903NG

Mfr. Part

LM2903NG

Manufacturer

AMI Semiconductor / onsemi

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Detailed Description

Dual general-purpose voltage comparator in 8-PDIP through-hole package. Two independent comparators with open-collector outputs. Operates from single supply 2V to 36V or dual supply ±1V to ±18V. Wide common-mode range including ground. Robust, simple, and cost-effective choice for threshold and level detection.

Category: Integrated Circuits (ICs), Linear - Comparators

Base product family: LM2903

Stock available: 3694 units

Operating temperature: -40°C to 105°C

Key Features

Dual comparator (2 elements) in one IC for compact designs

Open-collector outputs for flexible pull-up to different logic levels

Works with single or dual supplies (2V to 36V or ±1V to ±18V)

Input common-mode includes ground for single-supply sensing

Low input offset voltage (max 7 mV at 30V)

Low quiescent current (max 2.5 mA)

Typical output sink current 16 mA at 5V

Through-hole PDIP for easy prototyping and field repair

Pin-compatible with many LM2903/LM393 family parts

Key Advantages

Versatile output interfaces: use a pull-up to TTL, CMOS, DTL, MOS, or even ECL with proper level shifting

Wide supply range simplifies power design across many systems

Simple, reliable threshold detection without complex configuration

Cost-effective and widely available with broad second-source support

Stable performance across industrial temperature range

Easy to debug and replace thanks to 8-PDIP format

Packaging

Type: 8-PDIP (Plastic Dual In-Line Package), through-hole

Material: Epoxy molding compound body, tin-plated copper alloy leads

Mechanical size: 0.300 inch body width (7.62 mm), standard 2.54 mm lead pitch; typical body length ~9–10 mm, height ~3–4 mm

Pin configuration (typical LM2903/LM393 DIP pinout):

Pin 1: Output A

Pin 2: Inverting Input A

Pin 3: Non-Inverting Input A

Pin 4: GND

Pin 5: Non-Inverting Input B

Pin 6: Inverting Input B

Pin 7: Output B

Pin 8: VCC

Mounting: Through hole, easy soldering and rework

Thermal characteristics: PDIP offers good heat spreading; typical junction-to-ambient thermal resistance ~100–150 °C/W depending on PCB and airflow

Electrical properties:

Supply voltage: 2V to 36V (single), ±1V to ±18V (dual)

Input offset voltage: max 7 mV at 30V

Input bias current: typically hundreds of nA at 5V (datasheet value)

Quiescent current: max 2.5 mA

Output sink current: typ 16 mA at 5V

Output type: Open-collector; requires external pull-up resistor to desired logic level

Supplier device package: 8-PDIP

Tube packaging for transport and storage

Lifecycle

Status: Active and widely used; not near discontinuation based on current industry status

Direct equivalents and close alternatives:

Onsemi LM2903DR2G (SOIC-8, SMD) – same function, surface-mount

Onsemi LM2903N (8-PDIP) – similar PDIP variant

Texas Instruments LM2903N (8-PDIP), LM2903DR (SOIC-8) – pin-compatible family

STMicroelectronics LM2903N (DIP-8), LM2903D (SO-8) – pin-compatible

Microchip MCP6562 (SO-8, push-pull output) – alternative if push-pull output is preferred; check specs

TI LM393N (DIP-8) – dual comparator, very similar behavior; verify offset and input range

Diodes Inc. LM2903N (DIP-8) – second source

Always check datasheets for exact limits (offset, bias current, temperature, output current) before substitution. If you need help finding a perfect match, contact our sales team via the Y-IC website and we will recommend the best drop-in or enhanced replacement.

Key Application Areas

Voltage threshold detection and window comparators

Battery level and power-good monitors

Zero-crossing detectors and line sensing

Oscillators, pulse and PWM generation

Sensor signal conditioning (temperature, light, pressure)

Automotive and industrial control systems

Overcurrent and overvoltage protection circuits

Level shifting and logic interfacing with open-collector outputs

Datasheet

Y-IC provides the most authoritative and up-to-date datasheet for LM2903NG on our product page. For precise electrical specs, recommended pull-up resistor values, pinout confirmation, and thermal data, download the datasheet directly from our website.

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