LM339ADRG4 Equivalent & Substitute Parts

Part Overview

The LM339ADRG4 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 part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LM339ADRG4
Category	Linear Comparator
Number of Elements	4
Output Type	Open-Collector
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Voltage - Supply, Single/Dual (±)	2V ~ 30V, ±1V ~ 15V
Voltage - Input Offset (Max)	3mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LM339ADRG4 is determined by the following critical parameters:

Package compatibility: 14-SOIC surface-mount form factor (0.154", 3.90mm width)
Functional equivalence: Four independent open-collector comparators
Electrical specifications: Supply voltage range, input offset voltage, input bias current, output current capability, and quiescent current
Operating temperature range: 0°C to 70°C minimum requirement
Compliance: ROHS3 compliance and MSL rating

Substitute parts are grouped into two categories:

Manufacturer Recommended Substitutes: Parts explicitly recommended by manufacturers as direct replacements, including LM139AD, LM339AM/NOPB, LM339AMX/NOPB, LM339M/NOPB, LM339MX/NOPB, LP339M/NOPB, LP339MX/NOPB, BA2901SF-E2, and LM139ADT. These maintain functional equivalence with variations in operating temperature range, supply voltage range, or output type.
Parametric Equivalent: LM339ADR is a parametric equivalent sharing identical electrical specifications and the same base product number (LM339), differing only in packaging format.

Parameter Comparison

Part Number	Manufacturer	Supply Voltage (Single/Dual)	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Output Type	Package	Product Status
LM339ADRG4	Texas Instruments	2V~30V, ±1V~15V	3mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Open-Collector	14-SOIC	Obsolete
LM139AD	Texas Instruments	2V~30V, ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	Open-Collector, Open-Drain	14-SOIC	Last Time Buy
LM339AM/NOPB	National Semiconductor	2V~36V, ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector	14-SOIC	Active
LM339AMX/NOPB	Texas Instruments	2V~36V, ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector	14-SOIC	Active
LM339M/NOPB	Texas Instruments	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector	14-SOIC	Active
LM339MX/NOPB	Texas Instruments	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector	14-SOIC	Active
LP339M/NOPB	Texas Instruments	2V~36V, ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	CMOS, MOS, Open-Collector	14-SOIC	Active
LP339MX/NOPB	Texas Instruments	2V~36V, ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	CMOS, MOS, Open-Collector	14-SOIC	Active
LM339ADR	Texas Instruments	2V~30V, ±1V~15V	3mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Open-Collector	14-SOIC	Active
BA2901SF-E2	Rohm Semiconductor	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Open-Collector	14-SOP	Active
LM139ADT	STMicroelectronics	2V~32V, ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-55°C ~ 125°C	Open-Collector	14-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation: LM339ADR

The LM339ADR is the optimal substitute for the obsolete LM339ADRG4. This part maintains identical electrical specifications, supply voltage range, and operating temperature requirements. Both devices share the same base product number (LM339) and 14-SOIC package format. The LM339ADR is currently in active production status with high inventory availability (105,100 pcs), ensuring long-term supply continuity. Both parts are ROHS3 compliant with MSL rating of 1 (unlimited).

Secondary Recommendations: LM339AMX/NOPB and LM339MX/NOPB

These Texas Instruments parts offer extended supply voltage ranges (2V~36V, ±1V~18V) compared to the original specification (2V~30V, ±1V~15V), providing additional design flexibility. Both maintain the 14-SOIC package and 0°C to 70°C operating temperature range. LM339AMX/NOPB features lower input offset voltage (2mV @ 30V) and is available in higher quantities (25,850 pcs). LM339MX/NOPB offers similar performance with 5mV input offset voltage and 58,515 pcs in stock. Both are active products with ROHS3 compliance.

Extended Temperature Range Options: LM139AD and LM139ADT

For applications requiring extended operating temperature ranges (-55°C to 125°C), LM139AD (Texas Instruments, Last Time Buy status) and LM139ADT (STMicroelectronics, Active status) provide superior thermal performance. Both maintain the 14-SOIC package and offer improved input offset voltage (2mV @ 30V) and reduced input bias current (0.1µA @ 5V). LM139ADT is the preferred choice due to active product status and STMicroelectronics supply chain availability.

Low-Power Alternative: LP339M/NOPB and LP339MX/NOPB

For applications prioritizing minimal quiescent current consumption, the LP339 series (CMOS/MOS output type) reduces quiescent current to 100µA compared to 2.5mA in standard versions. Input bias current is significantly lower at 0.025µA @ 5V. These parts maintain the 14-SOIC package and 0°C to 70°C operating temperature. Trade-offs include reduced output current capability (10mA @ 5V) and higher input offset voltage (5mV @ 5V).

Cross-Manufacturer Option: BA2901SF-E2

Rohm Semiconductor's BA2901SF-E2 provides an alternative from a different manufacturer with extended operating temperature range (-40°C to 105°C). The 14-SOP package is mechanically compatible with 14-SOIC footprints. This part is active in production with 15,500 pcs available inventory and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LM339ADRG4 with LM339ADR?

A: Yes. The LM339ADR is a direct parametric equivalent with identical electrical specifications, supply voltage range (2V~30V, ±1V~15V), operating temperature (0°C~70°C), and 14-SOIC package. Both are ROHS3 compliant with MSL rating 1. The primary difference is product status: LM339ADRG4 is obsolete while LM339ADR is active in production.

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

A: Both parts are functionally equivalent with identical electrical specifications and 14-SOIC packaging. The primary difference is input offset voltage specification: LM339AMX/NOPB specifies 2mV @ 30V while LM339MX/NOPB specifies 5mV @ 30V. LM339AMX/NOPB offers tighter offset voltage tolerance and is available in higher quantities (25,850 pcs vs. 58,515 pcs).

Q: Can I use LP339M/NOPB as a drop-in replacement?

A: LP339M/NOPB is mechanically compatible (14-SOIC package) but not a direct electrical replacement. The LP339 series features CMOS/MOS output type with significantly lower quiescent current (100µA vs. 2.5mA) and input bias current (0.025µA vs. 0.25µA). However, output current capability is reduced to 10mA @ 5V compared to 20mA in the original. Verify application requirements for output current and quiescent current before substitution.

Q: What is the difference between 14-SOIC and 14-SOP packages?

A: Both are 14-pin surface-mount packages with similar footprints. The primary difference is body width: 14-SOIC is 0.154" (3.90mm) while 14-SOP is 0.173" (4.40mm). For most PCB designs, these packages are mechanically interchangeable, though verification of specific board layout is recommended. BA2901SF-E2 uses the 14-SOP variant.

Q: Why should I choose LM139ADT over LM139AD?

A: Both parts offer extended operating temperature range (-55°C to 125°C) and improved electrical specifications compared to the original LM339ADRG4. LM139ADT (STMicroelectronics) is preferred because it maintains active product status, ensuring long-term availability and supply chain stability. LM139AD (Texas Instruments) is classified as Last Time Buy, indicating limited future availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity level), matching the original LM339ADRG4 compliance profile.

Q: Can I use parts with extended supply voltage ranges (2V~36V) in place of the original (2V~30V)?

A: Yes. Extended supply voltage range specifications are backward compatible. Parts rated for 2V~36V operation safely function within the original 2V~30V specification window. This provides additional design flexibility for future applications requiring higher supply voltages.

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