LM339FJ-E2 Equivalent & Substitute Parts

Part Overview

The LM339FJ-E2 is a general-purpose quad comparator manufactured by Rohm Semiconductor in a 14-SOPJ surface-mount package. This device features open-collector output configuration and operates across a wide supply voltage range of 3V to 32V (single supply) or ±1.5V to ±16V (dual supply). The part is actively produced and RoHS3 compliant, making it suitable for industrial and commercial applications requiring precision voltage comparison functionality.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific application parameters that align with the original specification.

Key Parameters

Parameter	Value	Measurement Condition
Number of Elements	4	N/A
Output Type	Open-Collector	N/A
Voltage - Supply, Single/Dual (±)	3V ~ 32V, ±1.5V ~ 16V	N/A
Voltage - Input Offset (Max)	4.5mV	@ 1.4V
Current - Input Bias (Max)	0.05µA	@ 1.4V
Current - Output (Typ)	16mA	@ 5V
Current - Quiescent (Max)	2mA	N/A
Operating Temperature	-40°C ~ 85°C	N/A
Package / Case	14-SOIC (0.154", 3.90mm Width)	N/A
Mounting Type	Surface Mount	N/A
RoHS Status	ROHS3 Compliant	N/A
Moisture Sensitivity Level (MSL)	1 (Unlimited)	N/A

Substitute Part Grouping Explanation

Substitute parts for the LM339FJ-E2 are qualified based on the following critical parameters:

Functional Equivalence Criteria:

Four independent comparator elements
Open-collector output configuration
General-purpose comparator classification
14-pin SOIC package family (0.154" width, 3.90mm)
Surface-mount technology
Active product status
RoHS3 compliance

Electrical Compatibility Parameters:

Supply voltage range overlap with original specification
Input offset voltage performance
Input bias current characteristics
Output current capability
Quiescent current consumption
Operating temperature range coverage

Substitutes are grouped into two categories based on supply voltage range compatibility and output type configuration. Parts with restricted supply voltage ranges (2.7V ~ 5.5V) are suitable only for applications operating within this narrower window. Parts with extended supply voltage ranges (2V ~ 36V) provide broader application flexibility.

Parameter Comparison

Parameter	LM339FJ-E2 (Rohm)	AS339AMTR-G1 (Diodes Inc.)	LMV339IDR (TI)	LMV339M/NOPB (TI)	LMV339MT (Nat. Semi.)
Manufacturer	Rohm Semiconductor	Diodes Incorporated	Texas Instruments	Texas Instruments	National Semiconductor
Number of Elements	4	4	4	4	4
Output Type	Open-Collector	Open-Collector	Open-Collector	CMOS, Open-Collector, TTL	CMOS, Open-Collector, TTL
Voltage - Supply, Single/Dual (±)	3V ~ 32V, ±1.5V ~ 16V	2V ~ 36V, ±1V ~ 18V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Voltage - Input Offset (Max)	4.5mV @ 1.4V	3mV @ 5V	7mV @ 5V	7mV @ 5V	7mV @ 5V
Current - Input Bias (Max)	0.05µA @ 1.4V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Current - Output (Typ)	16mA @ 5V	16mA @ 5V	84mA @ 5V	84mA @ 5V	84mA @ 5V
Current - Quiescent (Max)	2mA	2mA	350µA	300µA	300µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-TSSOP (0.173", 4.40mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	Not Specified
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tube	Bulk

Engineering Selection Recommendations

AS339AMTR-G1 (Diodes Incorporated)

This substitute provides the closest electrical match to the LM339FJ-E2 with identical output current specifications (16mA @ 5V) and quiescent current (2mA). The AS339AMTR-G1 features an extended supply voltage range (2V ~ 36V, ±1V ~ 18V) that encompasses the original part's operating window. Both devices maintain -40°C to 85°C temperature ratings and are RoHS3 compliant. The primary consideration is the MSL rating of 3 (168 Hours) versus the original part's MSL 1 (Unlimited), which may impact storage and handling requirements in moisture-sensitive environments. This part is suitable for direct substitution in applications requiring extended supply voltage flexibility.

LMV339IDR (Texas Instruments)

This substitute operates within a restricted supply voltage range (2.7V ~ 5.5V) and is appropriate only for applications operating within this narrower window. The LMV339IDR provides significantly higher output current capability (84mA @ 5V) and features an extended operating temperature range (-40°C to 125°C). Quiescent current is higher at 350µA. This part is RoHS3 compliant with MSL 1 (Unlimited) rating. Selection of this part requires confirmation that the application supply voltage does not exceed 5.5V.

LMV339M/NOPB (Texas Instruments)

This substitute shares identical electrical specifications with the LMV339IDR but is packaged in Tube format rather than Cut Tape. It operates within the same restricted supply voltage range (2.7V ~ 5.5V) with 84mA output current and 300µA quiescent current. The operating temperature range is -40°C to 85°C. RoHS3 compliance and MSL 1 (Unlimited) rating are maintained. This part is suitable for applications with lower volume requirements or specific packaging preferences.

LMV339MT (National Semiconductor)

This substitute features identical electrical specifications to the LMV339M/NOPB but is packaged in a 14-TSSOP case (0.173", 4.40mm width) rather than the standard 14-SOIC. The different package footprint requires PCB layout modification and is not a direct pin-compatible replacement. This part operates within the restricted supply voltage range (2.7V ~ 5.5V) with 84mA output current and 300µA quiescent current. RoHS and MSL compliance information is not specified. Selection of this part requires PCB redesign to accommodate the alternative package geometry.

Frequently Asked Questions (FAQ)

Q: Can the LMV339IDR, LMV339M/NOPB, or LMV339MT be used as direct replacements for the LM339FJ-E2 in all applications?

A: No. These three Texas Instruments and National Semiconductor parts operate within a restricted supply voltage range of 2.7V to 5.5V, compared to the LM339FJ-E2's 3V to 32V range. They are suitable only for applications operating within the 2.7V to 5.5V window. The AS339AMTR-G1 provides broader supply voltage compatibility (2V to 36V).

Q: What is the primary electrical difference between the AS339AMTR-G1 and the LMV339 series parts?

A: The AS339AMTR-G1 maintains the original LM339FJ-E2's output current specification of 16mA @ 5V and quiescent current of 2mA. The LMV339 series (LMV339IDR, LMV339M/NOPB, LMV339MT) provides higher output current (84mA @ 5V) and lower quiescent current (300-350µA), making them suitable for applications requiring higher output drive capability but restricted to lower supply voltages.

Q: Is the LMV339MT pin-compatible with the LM339FJ-E2?

A: No. The LMV339MT uses a 14-TSSOP package (0.173", 4.40mm width) while the LM339FJ-E2 uses a 14-SOIC package (0.154", 3.90mm width). Although both are 14-pin surface-mount packages, the different footprints require PCB layout modification and are not directly interchangeable without redesign.

Q: What is the significance of the MSL (Moisture Sensitivity Level) difference between these parts?

A: The LM339FJ-E2, LMV339IDR, and LMV339M/NOPB have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling. The AS339AMTR-G1 has MSL 3 (168 Hours), requiring that the component be used within 168 hours of package opening in non-controlled humidity environments. Applications in moisture-sensitive manufacturing environments should account for this difference in handling procedures.

Q: Can the LMV339 series parts operate at the full 32V supply voltage of the LM339FJ-E2?

A: No. The LMV339 series (LMV339IDR, LMV339M/NOPB, LMV339MT) have a maximum supply voltage rating of 5.5V. Operation above this voltage will damage the device. The AS339AMTR-G1 supports supply voltages up to 36V and is the appropriate substitute for high-voltage applications.

Q: Are all substitute parts RoHS3 compliant?

A: The LM339FJ-E2, AS339AMTR-G1, LMV339IDR, and LMV339M/NOPB are all confirmed RoHS3 compliant. The LMV339MT does not have RoHS compliance information specified in the available data. Verification with the manufacturer is recommended if RoHS3 compliance is a requirement.

Q: What is the temperature operating range difference between these parts?

A: The LM339FJ-E2, AS339AMTR-G1, LMV339M/NOPB, and LMV339MT operate from -40°C to 85°C. The LMV339IDR extends the upper temperature limit to 125°C, providing broader temperature range coverage for high-temperature applications.

Q: Which substitute part provides the closest electrical match to the LM339FJ-E2?

A: The AS339AMTR-G1 provides the closest electrical match with identical output current (16mA @ 5V), quiescent current (2mA), and temperature range (-40°C to 85°C). It also provides extended supply voltage range compatibility (2V to 36V) that encompasses the original part's operating window.

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