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LM2901M/NOPB

Quad comparator, 3-36V, open-collector, 1.3μs, SOIC-14

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Manufacturer Part：

LM2901M/NOPB

Package：

SOIC-14 (8.65 × 3.91 × 1.45 mm)

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Description

Product Overview

The LM2901M/NOPB is a quad differential comparator from Texas Instruments, packaged in a 14-pin SOIC (M) package. It is designed to operate from a single power supply over a wide range of 3V to 36V, with an open-collector output configuration. The device features a common-mode input voltage range that includes ground, making it ideal for ground-referenced signal comparison.

Key Specifications

Function Quad Differential Comparator
Channels 4
Supply Voltage 3V to 36V (single supply)
Input Common-Mode Range 0V to VCC-1.5V
Output Type Open Collector
Response Time 1.3μs (typical)
Supply Current 2.5mA (typical)
Package 14-pin SOIC (8.65 × 3.91 mm)
Operating Temperature -40°C to +85°C

Features

  • Four independent comparators in a single package
  • Wide supply voltage range: 3V to 36V
  • Open-collector outputs allow wired-OR connections
  • Input common-mode range includes ground
  • Low supply current: 2.5mA typical for all four channels
  • Compatible with all logic families via pull-up resistor

Applications

  • Voltage level detection and window comparators
  • Zero-crossing detection in AC circuits
  • Oscillator and timing circuits
  • Battery voltage monitoring
  • Industrial logic-level translation

The LM2901 is part of TI’s LMx39/LM2901 family of quad differential comparators designed for single-supply operation over a wide voltage range. It contains four independent comparators, each with an open-collector output that can be connected to voltages up to 36V regardless of the supply voltage, enabling level translation and wired-OR logic. The input common-mode voltage range includes ground, allowing ground-referenced signal comparison without additional bias circuitry. The LM2901M variant in SOIC-14 package offers robust performance for automotive and industrial environments.

Each comparator in the LM2901 consists of a differential input stage, gain stages, and an open-collector output transistor. The differential input stage compares the voltage at the non-inverting input (+) with the voltage at the inverting input (-). When the non-inverting input voltage exceeds the inverting input, the internal output transistor turns off, allowing the open-collector output to be pulled high by an external pull-up resistor. When the inverting input is higher, the output transistor turns on, pulling the output low. The open-collector configuration enables wired-OR connections where multiple comparator outputs can share a single pull-up resistor, generating a logic OR function. The output can also be pulled up to a voltage different from the supply, facilitating level translation.

Pin Name Type Function
1 OUT2 Output Comparator 2 output (open collector)
2 OUT1 Output Comparator 1 output (open collector)
3 VCC Power Positive supply voltage (3-36V)
4 IN1- Input Comparator 1 inverting input
5 IN1+ Input Comparator 1 non-inverting input
6 IN2- Input Comparator 2 inverting input
7 IN2+ Input Comparator 2 non-inverting input
8 IN3- Input Comparator 3 inverting input
9 IN3+ Input Comparator 3 non-inverting input
10 IN4- Input Comparator 4 inverting input
11 IN4+ Input Comparator 4 non-inverting input
12 GND Power Ground
13 OUT4 Output Comparator 4 output (open collector)
14 OUT3 Output Comparator 3 output (open collector)
  • Overvoltage/undervoltage window comparator for power supply monitoring
  • Zero-crossing detector for AC mains timing
  • Battery low-voltage detection and alert circuit
  • Relaxation oscillator for LED flasher and timing
  • Industrial digital input signal conditioning with level translation
Manufacturer Part Number Package Notes
TI LM339M SOIC-14 Commercial grade version (0-70°C)
TI LM239M SOIC-14 Extended temperature (-25 to +85°C)
ADI ADCMP354 SC-70-6 Single comparator, built-in reference
Maxim MAX9022 SOT-23-8 Dual nanopower comparator
Microchip MCP6541 SOT-23-5 Single comparator, push-pull output
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Service & Packaging

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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