LMx39-N - Low-Power Low-Offset Voltage Quad Comparators - Datasheet Overview

Oct 12, 2026

LMx39-N series includes four independent precision voltage comparators designed for single-supply operation across a wide input range. Key characteristics include very low supply current drain (0.8 mA, independent of supply voltage), low input bias and offset currents (25 nA bias, ±5 nA offset current), and low offset voltage (±3 mV). The input common-mode range includes GND, enabling sensing near ground. The devices support TTL/CMOS interfacing and can also interface with MOS logic using split or single supply options.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages33

Reading Time1 h 23 min

AccessFree to download

1 Features

2 Applications

3 Description

4 Revision History

5 Pin Configuration and Functions

6 Specifications

6.1 Absolute Maximum Ratings

6.2 ESD Ratings

6.3 Recommended Operating Conditions

6.4 Thermal Information

6.5 Electrical Characteristics: LM139A, LM239A, LM339A, LM139

6.6 Electrical Characteristics: LM239, LM339, LM2901, LM3302

6.7 Typical Characteristics

7 Detailed Description

7.1 Overview

7.2 Functional Block Diagram

7.3 Feature Description

7.4 Device Functional Modes

8 Application and Implementation

8.1 Application Information

8.2 Typical Applications

9 Power Supply Recommendations

10 Layout

10.1 Layout Guidelines

10.2 Layout Example

11 Device and Documentation Support

11.1 Related Links

11.2 Trademarks

11.3 Electrostatic Discharge Caution

11.4 Glossary

12 Mechanical, Packaging, and Orderable Information

LMx39-N, LM2901-N, LM3302-N Low-Power Low-Offset Voltage Quad Comparators 1 Features • Wide Supply Voltage Range • LM139/139A Series 2 to 36 VDC or ±1 to ± 18 VDC • LM2901-N: 2 to 36 VDC or ±1 to ± 18 VDC • LM3302-N: 2 to 28 VDC or ±1 to ±14 VDC • Very Low Supply Current Drain (0 .8 mA)—Independent of Supply Voltage • Low Input Biasing Current: 25 nA • Low Input Offset Current: ±5 nA • Offset Voltage: ±3 mV • Input Common-Mode Voltage Range Includes GND • Differential Input Voltage Range Equal to the Power Supply Voltage • Low Output Saturation Voltage: 250 mV at 4 mA • Output Voltage Compatible With TTL, DTL, ECL, MOS, and CMOS Logic Systems • Advantages: 3 Description The LMx39-N series consists of four independent precision voltage comparators with an offset voltage specification as low as 2 mV maximum for all four comparators. These comparators were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. These comparators also have a unique characteristic in that the input common-mode voltage range includes ground, eventhough they are operated from a single power supply voltage. The LMx39-N series was designed to directly interface with TTL and CMOS. When operated from both plus and minus power supplies, the devices directly interface with MOS logic— where the low power drain of the LM339 is a distinct advantage over standard comparators. Device Information(1) – High-Precision Comparators – Reduced VOS Drift Overtemperature – Eliminates Need for Dual Supplies – Allows Sensing Near GND – Compatible With All Forms of Logic – Power Drain Suitable for Battery Operation 2 Applications | PART NUMBER | PACKAGE | BODY SIZE (NOM) | | --- | --- | --- | | LM139-N | CDIP (14) | 19.56 mm × 6.67 mm | | LM239-N | | | | LM2901-N | SOIC (14) | 8.65 mm × 3.91 mm | | | PDIP (14) | 19.177 mm × 6.35 mm | | LM339-N | CDIP (14) | 19.56 mm × 6.67 mm | | | SOIC (14) | 8.65 mm × 3.91 mm | | | PDIP (14) | 19.177 mm × 6.35 mm | • Limit Comparators • Simple Analog-to-Digital Converters (ADCs) • Pulse, Squarewave, and Time Delay Generators • Wide Range VCO; MOS Clock Timers • Multivibrators and High-Voltage Digital Logic Gates (1) For all available packages, see the orderable addendum atthe end of the datasheet. One-Shot Multivibrator With Input Lock Out An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LM139-N, LM239-N, LM2901-N, LM3302-N, LM339-N SNOSBJ3E –NOVEMBER 1999–REVISED DECEMBER 2014 [www.ti.com](www.ti.com) | Table of Contents | | | | --- | --- | --- | | 1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions ....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics: LM139A, LM239A, LM339A, LM139 ......................................................... 6
6.6 Electrical Characteristics: LM239, LM339, LM2901, LM3302 ..................................................................... 7
6.7 Typical Characteristics ............................

FAQs

What are the LMx39-N key feature advantages for power consumption and offset performance?

The LMx39-N series has very low supply current drain (0.8 mA, independent of supply voltage) and low input bias/offset currents (25 nA bias, ±5 nA offset current). It also specifies low offset voltage (±3 mV).

How does the LMx39-N family support single-supply operation and sensing near ground?

The input common-mode voltage range includes GND, and the differential input voltage range equals the power supply voltage. This enables sensing near GND even when operated from a single supply.

What logic interfaces are supported by the LMx39-N series?

The devices are designed to directly interface with TTL and CMOS. When operated from plus and minus supplies, they can also interface with MOS logic, where the low power drain is an advantage over standard comparators.

Oct 12, 2026

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