LP339M Equivalent & Substitute Parts

Part Overview

The LP339M is a general-purpose comparator IC manufactured by Texas Instruments, featuring four independent comparators in a 14-SOIC surface-mount package. The device operates across a wide supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) and is designed for applications requiring low-power comparison operations with open-collector output capability.

The LP339M is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements. Active alternatives with compatible electrical and mechanical specifications are available from multiple manufacturers.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LP339M
Product Status	Obsolete
Package / Case	14-SOIC (0.154", 3.90mm Width)
Number of Elements	4
Output Type	CMOS, MOS, Open-Collector
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	5mV @ 5V
Current - Input Bias (Max)	0.025µA @ 5V
Current - Output (Typ)	10mA
Current - Quiescent (Max)	100µA
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LP339M is determined by strict alignment of the following critical parameters:

Electrical Compatibility Requirements:

Number of Elements: 4 comparators
Output Type: Must support Open-Collector configuration
Voltage - Supply, Single/Dual (±): Must encompass or match 2V ~ 36V, ±1V ~ 18V range
Voltage - Input Offset (Max): Must not exceed 5mV @ 5V (or equivalent specification)
Current - Input Bias (Max): Must not exceed 0.025µA @ 5V (or equivalent specification)
Current - Output (Typ): Must support minimum 10mA @ 5V
Current - Quiescent (Max): Must not exceed 100µA

Mechanical Compatibility Requirements:

Package / Case: 14-SOIC (0.154", 3.90mm Width) or equivalent 14-pin SOIC footprint
Mounting Type: Surface Mount

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: MSL 1 or MSL 3 acceptable for standard applications

Substitute parts are grouped into three categories: Direct Equivalents (identical specifications), Upgrades (enhanced performance within compatible parameters), and Manufacturer-Recommended Alternatives (functionally equivalent with design optimization).

Parameter Comparison

Part Number	Manufacturer	Product Status	Package	Output Type	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	MSL
LP339M	Texas Instruments	Obsolete	14-SOIC	CMOS, MOS, Open-Collector	2V~36V, ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA	100µA	0°C ~ 70°C	1
LP339M/NOPB	Texas Instruments	Active	14-SOIC	CMOS, MOS, Open-Collector	2V~36V, ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	1
LM2901QS14-13	Diodes Incorporated	Active	14-SOIC	CMOS, TTL	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	1
LM2901S14-13	Diodes Incorporated	Active	14-SOIC	Not specified	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	3
AS339AMTR-E1	Diodes Incorporated	Active	14-SOIC	Open-Collector	2V~36V, ±1V~18V	3mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	1
AS339MTR-E1	Diodes Incorporated	Active	14-SOIC	Open-Collector	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	3
AS339MTR-G1	Diodes Incorporated	Active	14-SOIC	Open-Collector	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA	2mA	-40°C ~ 85°C	3
BA10339F-E2	Rohm Semiconductor	Active	14-SOIC (0.173", 4.40mm)	Open-Collector	3V~36V, ±1.5V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	1
BA2901SF-E2	Rohm Semiconductor	Active	14-SOIC (0.173", 4.40mm)	Open-Collector	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	1
CMP04FSZ	Analog Devices Inc.	Active	14-SOIC	CMOS, DTL, ECL, MOS, Open-Collector, TTL	3.3V~36V, ±1.65V~18V	1mV @ 5V	0.1µA @ 5V	16mA @ 5V	3mA	-40°C ~ 85°C	1
CMP04FSZ-REEL	Analog Devices Inc.	Active	14-SOIC	CMOS, DTL, ECL, MOS, Open-Collector, TTL	3.3V~36V, ±1.65V~18V	1mV @ 5V	0.1µA @ 5V	16mA @ 5V	3mA	-40°C ~ 85°C	1

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute): LP339M/NOPB (Texas Instruments) is the direct active equivalent. This part maintains identical electrical specifications and operating temperature range as the obsolete LP339M. Product status is Active with unlimited MSL rating. This is the preferred choice for designs requiring no circuit modifications.

Functionally Compatible Alternatives: The AS339AMTR-E1, AS339MTR-E1, and AS339MTR-G1 (Diodes Incorporated) are manufacturer-recommended alternatives with Open-Collector output configuration matching the LP339M specification. These parts feature improved quiescent current performance (2mA vs. 100µA) and extended operating temperature range (-40°C to 85°C). All three maintain the 14-SOIC package footprint and ROHS3 compliance. The AS339AMTR-E1 offers superior input offset specification (3mV vs. 5mV).

Extended Temperature Range Options: LM2901QS14-13 (Diodes Incorporated) and BA2901SF-E2 (Rohm Semiconductor) provide extended operating temperature ranges (-40°C to 125°C and -40°C to 105°C respectively), suitable for industrial and automotive applications. Both maintain supply voltage compatibility and 14-SOIC packaging. Note: LM2901QS14-13 includes AEC-Q100 automotive qualification.

High-Performance Alternative: CMP04FSZ and CMP04FSZ-REEL (Analog Devices Inc.) offer superior input offset specification (1mV vs. 5mV) and documented CMRR/PSRR performance (100dB). These parts support extended output type compatibility and are suitable for precision measurement applications. Minimum supply voltage is 3.3V single supply (vs. 2V for LP339M).

Package Consideration: BA10339F-E2 and BA2901SF-E2 (Rohm Semiconductor) feature slightly wider 14-SOIC packages (0.173" vs. 0.154" width). Verify PCB layout compatibility before selection.

Frequently Asked Questions (FAQ)

Q: Can LP339M/NOPB be used as a direct replacement for LP339M? A: Yes. LP339M/NOPB is the active production equivalent with identical electrical specifications, operating temperature range, and 14-SOIC package. No circuit modifications are required.

Q: What is the key difference between AS339AMTR-E1 and AS339MTR-E1? A: Both are Diodes Incorporated alternatives with Open-Collector output. AS339AMTR-E1 specifies 3mV input offset (vs. 5mV for AS339MTR-E1) and carries MSL 1 rating. AS339MTR-E1 carries MSL 3 rating. Electrical performance is otherwise equivalent.

Q: Are Rohm Semiconductor BA10339F-E2 and BA2901SF-E2 pin-compatible with LP339M? A: Both parts use 14-SOIC packaging and maintain pin compatibility. However, the package body width is 0.173" (vs. 0.154" for LP339M). Verify PCB footprint clearances before implementation.

Q: Can CMP04FSZ be used in applications requiring 2V single supply operation? A: No. CMP04FSZ specifies minimum 3.3V single supply voltage. LP339M supports operation down to 2V. For 2V applications, use LP339M/NOPB, LM2901QS14-13, LM2901S14-13, AS339AMTR-E1, AS339MTR-E1, AS339MTR-G1, or BA2901SF-E2.

Q: Which substitute offers the best quiescent current performance? A: AS339AMTR-E1, AS339MTR-E1, and AS339MTR-G1 all specify 2mA maximum quiescent current, compared to 100µA for LP339M. This represents a trade-off for improved output current capability (16mA vs. 10mA).

Q: Is automotive qualification available for LP339M substitutes? A: Yes. LM2901QS14-13 (Diodes Incorporated) carries AEC-Q100 automotive qualification and is suitable for automotive-grade applications.

Q: What is the difference between CMP04FSZ and CMP04FSZ-REEL? A: Both parts are identical electrically. CMP04FSZ is supplied in Tube packaging; CMP04FSZ-REEL is supplied in Cut Tape (CT) & Digi-Reel® packaging. Selection depends on assembly process requirements.

Q: Can I use LM2901S14-13 in place of LM2901QS14-13? A: Both are Diodes Incorporated LM2901 variants with identical electrical specifications and operating temperature range. LM2901S14-13 carries MSL 3 rating (vs. MSL 1 for LM2901QS14-13). Verify moisture handling requirements before substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message