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LM339N

Quad Differential Comparator, 2-36V supply, open-collector output, PDIP-14

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Manufacturer Part：

LM339N

Package：

PDIP-14 (19.18 x 6.35 x 5.08 mm)

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Description

Product Overview

The LM339N is a quad differential comparator manufactured by Texas Instruments. It consists of four independent voltage comparators designed to operate from a single power supply over a wide range of voltages. The device features low input bias current, low offset voltage, and outputs that can sink up to 25mA, making it one of the most popular general-purpose comparators for industrial and consumer applications.

Key Specifications

Number of Channels 4
Supply Voltage Range 2V to 36V single, +/-1V to +/-18V dual
Input Offset Voltage 5mV max
Input Bias Current 25nA typical
Response Time 1.3us typical
Output Sink Current 16mA typical
Input Common-Mode Range 0V to VCC-1.5V
Operating Temperature 0C to 70C
Package PDIP-14

Features

  • Four independent comparators in one package
  • Wide supply voltage range (2V to 36V)
  • Input common-mode range includes ground
  • Open-collector outputs for wired-OR
  • Low input bias current (25nA)
  • Fast response time (1.3us)
  • Compatible with all logic families

Applications

  • Voltage level detection and comparison
  • Zero-crossing detectors
  • Oscillator and timing circuits
  • Battery monitoring circuits
  • Window comparators and threshold detectors

The LM339N from Texas Instruments is a quad differential comparator in a 14-pin DIP package. It contains four independent comparators with open-collector outputs, each capable of sinking up to 16mA. The device operates from a single 2V to 36V supply with input common-mode range that includes ground. Its open-collector output configuration allows wired-OR connections and direct interface with TTL and CMOS logic families. The LM339 is one of the most widely used comparators in industrial and consumer electronics.

Each comparator in the LM339N consists of a differential input stage and an open-collector output stage. The comparator continuously monitors the voltage difference between its inverting and non-inverting inputs. When the non-inverting input voltage exceeds the inverting input, the output transistor turns off (open circuit). When the inverting input exceeds the non-inverting input, the output transistor turns on, sinking current to ground. The open-collector output requires an external pull-up resistor to establish the high logic level. This configuration allows multiple outputs to be connected together for wired-OR logic.

Pin Name Type Function
1 2OUT Output Comparator 2 output
2 2OUT Output Comparator 1 output
3 VCC Power Positive supply (2-36V)
4 1IN- Input Comparator 1 inverting input
5 1IN+ Input Comparator 1 non-inverting input
6 2IN- Input Comparator 2 inverting input
7 2IN+ Input Comparator 2 non-inverting input
8 3IN- Input Comparator 3 inverting input
9 3IN+ Input Comparator 3 non-inverting input
10 4IN- Input Comparator 4 inverting input
11 4IN+ Input Comparator 4 non-inverting input
12 GND Power Ground
13 4OUT Output Comparator 4 output
14 3OUT Output Comparator 3 output
  • Voltage level detection and battery monitoring
  • Zero-crossing detection in AC signal processing
  • Window comparators for alarm and trip circuits
  • Oscillator and timing waveform generators
  • Logic level translation between different voltage domains
Manufacturer Part Number Package Notes
onsemi LM339N PDIP-14 Direct equivalent
STMicroelectronics LM339DT SOIC-14 SMD version
Texas Instruments LM2901N PDIP-14 Automotive grade, extended temp
Microchip MCP6544-I/P PDIP-14 Push-pull output, low voltage alternative
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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