Instant Quote

Home > Integrated Circuits ICs > Analog Linear ICs > LM139J

LM139J

Quad differential comparator, mil-temp -55/+125C, open-collector, CDIP-14

14149

Effective Inventory
Go to Inquiry

Image for reference only

Manufacturer Part：

LM139J

Package：

CDIP-14 (21.30 x 7.60 mm)

Brand：
Product Categories：
Quality Commitment
Shipping & Payment
Service & Packaging
Product Manual
Other recommendations you may be interested in.

STM32L072RBT6

TPS65217CRSLR

SN74HC273NSR

ADE7953ACPZ-RL

SN74HC138N

ATMEGA328-AU

AD826ARZ-REEL7

TPA0211DGNR

Description

Product Overview

The LM139J from Texas Instruments is a quad differential comparator in a CDIP-14 package rated for the full military temperature range of -55°C to +125°C. It consists of four independent precision voltage comparators designed to operate from a single power supply over a wide range of 2V to 36V, featuring low power consumption, open-collector outputs, and input common-mode range that includes ground.

Key Specifications

Channels 4 independent comparators
Supply Voltage Range 2V to 36V (single) or +/-1V to +/-18V (dual)
Input Offset Voltage 5 mV max (military grade)
Input Bias Current 25 nA typical
Output Type Open-collector
Response Time 1.3 µs typical
Operating Temperature -55°C to +125°C
Package CDIP-14 (21.30 x 7.60 mm)

Features

  • Four independent precision comparators in one package
  • Wide single supply voltage range: 2V to 36V
  • Input common-mode voltage range includes ground
  • Low input bias current: 25 nA typical
  • Open-collector outputs for wired-AND connections
  • Low output saturation voltage: 250 mV at 4 mA
  • Compatible with TTL, DTL, ECL, MOS, and CMOS logic

Applications

  • Military and aerospace systems requiring full mil-temp range
  • Zero-crossing detectors and level shifters
  • Window comparators and threshold detectors
  • Oscillator and timing circuits
  • Industrial control and instrumentation

The LM139J is a military-grade quad differential comparator from Texas Instruments, characterized for operation over the full military temperature range of -55°C to +125°C. It comprises four independent precision voltage comparators in a hermetic CDIP-14 package. Each comparator features an open-collector output capable of sinking up to 16 mA, low input bias current of 25 nA, and an input common-mode range that includes ground. The devices are designed to operate from a single power supply or dual supplies, making them versatile for a wide range of military and industrial applications.

Each of the four comparators in the LM139J compares the voltage at its inverting input (-) against the voltage at its non-inverting input (+). When the non-inverting input is higher than the inverting input plus the offset voltage, the open-collector output transistor turns off (high impedance). When the inverting input exceeds the non-inverting input plus offset, the output transistor turns on and sinks current to ground. The open-collector configuration allows multiple outputs to be wired-AND connected. The input stage uses a differential pair with PNP transistors, enabling the common-mode range to extend to ground even on single supply. A compensation capacitor provides stable operation without external components.

Pin Name Type Function
1 OUT2 Output Comparator 2 open-collector output
2 OUT1 Output Comparator 1 open-collector output
3 VCC Power Positive supply voltage (2-36V)
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 / negative supply
13 OUT4 Output Comparator 4 open-collector output
14 OUT3 Output Comparator 3 open-collector output
  • Military and aerospace systems requiring -55°C to +125°C operation
  • Zero-crossing detectors in power line monitoring
  • Window comparators for over/under voltage detection
  • Relay and lamp driver circuits using open-collector output
  • Industrial instrumentation and process control
Manufacturer Part Number Package Notes
TI LM239J CDIP-14 -25°C to +125°C industrial grade
TI LM339J CDIP-14 0°C to +70°C commercial grade
TI LM2901J CDIP-14 -40°C to +125°C automotive grade
STMicroelectronics LM139D SOIC-14 Mil-temp, SOIC package
onsemi LM139J CDIP-14 Second-source equivalent
Recommend Parts

TPS65217CRSLR

PMIC for AM335x, 3 bucks, 2 LDOs, battery charger, WLED, I2C, VQFN-48

Brand:

Package:

VQFN-48 (6×6 mm, 0.4 mm pitch)
In stock:
8909pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

SN74HC273NSR

Octal D-type flip-flop, edge-triggered, async clear, 28MHz, SOP-20

Brand:

Package:

SOP-20 (NS) (12.6×7.8 mm)
In stock:
8359pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

SN74HC138N

3-to-8 decoder/demux, active-low outputs, 3 enable inputs, 15ns, PDIP-16

Brand:

Package:

PDIP-16 (24.33×9.4 mm, Through-Hole)
In stock:
11952pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

TPA0211DGNR

2W mono Class-AB audio amp, BTL speaker + SE headphone, 2.5-5.5V, HVSSOP-8

Brand:

Package:

HVSSOP-8 (DGN) (3.0×4.9 mm, PowerPAD)
In stock:
3337pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

DP83848CVVX/NOPB

10/100 Ethernet PHY, MII/RMII/SNI, Auto-MDIX, 270mW, LQFP-48, commercial

Brand:

Package:

LQFP-48 (7×7 mm)
In stock:
14754pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

SN74HC245PWR

Octal bus transceiver, 3-state outputs, 2-6V, 12ns tpd, TSSOP-20

Brand:

Package:

TSSOP-20 (6.5×6.4 mm)
In stock:
2638pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry
Quality Assurance

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.

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.

Company
insights
Industries
All Products
Integrated Circuits
C&I Devices
Discrete
Memory Chips
MPUs & MCUs