LM339DRG4 Equivalent & Substitute Parts

Part Overview

The LM339DRG4 is a general-purpose quad comparator IC manufactured by Texas Instruments, housed in a 14-SOIC surface-mount package. This device features four independent open-collector output comparators designed for low-power applications with supply voltage ranges of 2V to 30V (single supply) or ±1V to ±15V (dual supply). The LM339DRG4 is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. Substitute parts must maintain functional compatibility across electrical specifications, package form factor, and mounting characteristics.

Key Parameters

Parameter	LM339DRG4 Specification
Number of Elements	4
Output Type	Open-Collector
Voltage Supply (Single/Dual)	2V ~ 30V / ±1V ~ 15V
Voltage - Input Offset (Max)	5mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the LM339DRG4 are classified into two categories based on electrical and mechanical compatibility:

MFR Recommended Substitutes maintain full functional equivalence with identical or superior electrical characteristics and active product status. These parts are direct replacements with no design modifications required.

Parametric Equivalents meet the core electrical requirements but may have extended operating temperature ranges, different output type configurations, or obsolete status. These require verification of specific application constraints.

Substitution eligibility is determined by the following criteria:

Package compatibility: 14-SOIC form factor with identical pin configuration
Output type: Open-Collector output stage (primary requirement)
Supply voltage range: Minimum 2V ~ 30V single supply or ±1V ~ 15V dual supply
Input offset voltage: Maximum 5mV @ 30V or better
Input bias current: Maximum 0.25µA @ 5V or better
Output current capability: Minimum 16mA typical
Quiescent current: Maximum 2.5mA or better
Surface-mount SOIC packaging with identical pinout

Parameter Comparison

Part Number	Manufacturer	Status	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range	Output Type
LM339DRG4	Texas Instruments	Obsolete	2V~30V / ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Open-Collector
LM139AD	Texas Instruments	Last Time Buy	2V~30V / ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	Open-Collector, Open-Drain
LM339AM/NOPB	National Semiconductor	Active	2V~36V / ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector
LM339AMX/NOPB	Texas Instruments	Active	2V~36V / ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector
LM339M/NOPB	Texas Instruments	Active	2V~36V / ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector
LM339MX/NOPB	Texas Instruments	Active	2V~36V / ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector
LP339M/NOPB	Texas Instruments	Active	2V~36V / ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	CMOS, MOS, Open-Collector
LP339MX/NOPB	Texas Instruments	Active	2V~36V / ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	CMOS, MOS, Open-Collector
LM339DR	Rohm Semiconductor	Obsolete	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	CMOS, MOS, Open-Collector, TTL
LM339DRG3	Texas Instruments	Last Time Buy	2V~30V / ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Open-Collector
AS339MTR-G1	Diodes Incorporated	Active	2V~36V / ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA	2mA	-40°C ~ 85°C	Open-Collector

Engineering Selection Recommendations

Primary Substitutes (Active Status, Direct Replacement)

LM339AMX/NOPB and LM339MX/NOPB are the preferred substitutes for new designs and production continuity. Both are manufactured by Texas Instruments with active product status, ensuring long-term availability. These parts maintain identical electrical performance to the LM339DRG4 with extended supply voltage range (2V~36V / ±1V~18V) and improved input offset voltage (2mV @ 30V). Packaging is 14-SOIC surface mount with ROHS3 compliance and unlimited moisture sensitivity rating.

Secondary Substitutes (Active Status, Extended Temperature Range)

LM139AD offers superior electrical characteristics with reduced input offset voltage (2mV @ 30V) and input bias current (0.1µA @ 5V), plus extended operating temperature range (-55°C ~ 125°C). This part is classified as Last Time Buy, indicating limited future availability. AS339MTR-G1 from Diodes Incorporated provides active product status with extended temperature range (-40°C ~ 85°C) and is suitable for industrial applications requiring wider operating conditions.

Low-Power Alternative

LP339MX/NOPB and LP339M/NOPB feature CMOS/MOS output stages with significantly reduced quiescent current (100µA versus 2.5mA), making them suitable for battery-powered or ultra-low-power applications. Output current capability is reduced to 10mA typical, requiring verification against load requirements.

Parametric Equivalents (Obsolete Status)

LM339DR and LM339DRG3 meet electrical requirements but carry obsolete or Last Time Buy status. These parts should be used only for legacy system maintenance or when inventory is available from authorized distributors.

All recommended substitutes maintain ROHS3 compliance and EAR99 export classification consistent with the original LM339DRG4.

Frequently Asked Questions (FAQ)

Q: Can LM339AMX/NOPB directly replace LM339DRG4 without PCB modifications?

A: Yes. Both parts use identical 14-SOIC pinout and package dimensions (0.154" width, 3.90mm). Electrical specifications are compatible with the LM339DRG4 application envelope. No PCB layout changes are required.

Q: What is the difference between LM339MX/NOPB and LM339AMX/NOPB?

A: Both parts are functionally equivalent with identical electrical specifications and packaging. The primary difference is inventory availability and packaging format (Cut Tape & Digi-Reel for both). Selection should be based on procurement requirements and supplier availability.

Q: Why is LP339MX/NOPB listed as a substitute if output current is only 10mA?

A: LP339MX/NOPB is a parametric equivalent suitable only for applications where 10mA output current is sufficient. The primary advantage is ultra-low quiescent current (100µA), beneficial for battery-powered designs. Applications requiring 16mA or higher output current must use LM339AMX/NOPB or LM339MX/NOPB.

Q: Is LM139AD suitable for high-temperature applications?

A: LM139AD supports operating temperature range of -55°C ~ 125°C, significantly wider than the LM339DRG4 (0°C ~ 70°C). However, LM139AD is classified as Last Time Buy, indicating limited future availability. For new high-temperature designs, AS339MTR-G1 (-40°C ~ 85°C, active status) is recommended.

Q: What is the significance of "Last Time Buy" status?

A: Last Time Buy indicates the manufacturer will accept orders for a limited period before discontinuing the part. Existing inventory may be available, but long-term supply cannot be guaranteed. For production designs, active-status parts (LM339AMX/NOPB, LM339MX/NOPB, AS339MTR-G1) are recommended.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitutes listed carry ROHS3 compliance certification, consistent with the original LM339DRG4. Compliance documentation is available from respective manufacturers.

Q: Can LM339DR from Rohm Semiconductor be used as a direct replacement?

A: LM339DR meets electrical requirements and uses identical 14-SOIC packaging. However, it is classified as obsolete with no guaranteed future availability. Use only for legacy system maintenance when inventory is confirmed available.

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