LM339DRG3 Equivalent & Substitute Parts

Part Overview

The LM339DRG3 is a general-purpose comparator IC with four independent differential comparators in a 14-SOIC surface-mount package. Manufactured by Texas Instruments, this device features open-collector outputs and operates across a wide supply voltage range of 2V to 30V (single supply) or ±1V to ±15V (dual supply). The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is essential for design continuity, long-term availability, and supply chain resilience.

Key Parameters

Parameter	LM339DRG3 Specification
Manufacturer	Texas Instruments
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM339DRG3 is determined by the following critical parameters:

Package compatibility: 14-SOIC surface-mount form factor with 0.154" width (3.90mm)
Functional equivalence: Four independent general-purpose comparators with open-collector output capability
Supply voltage range: Minimum 2V to 30V single supply or ±1V to ±15V dual supply
Output current capability: Minimum 16mA typical output current
Input offset voltage: Maximum 7mV at 5V or 5mV at 30V
Input bias current: Maximum 0.25µA at 5V
Quiescent current: Maximum 2.5mA
Operating temperature range: Support for 0°C to 70°C minimum
RoHS and regulatory compliance: ROHS3 compliant, REACH unaffected

Substitute parts are grouped into two categories: direct parametric equivalents (matching all critical specifications) and manufacturer-recommended alternatives (offering enhanced performance or extended operating ranges while maintaining functional compatibility).

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Product Status
LM339DRG3	Texas Instruments	14-SOIC	2V~30V, ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Last Time Buy
LM139AD	Texas Instruments	14-SOIC	2V~30V, ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	Last Time Buy
LM339DR	Rohm Semiconductor	14-SOIC	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Obsolete
BA2901SF-E2	Rohm Semiconductor	14-SOP	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Active
LM139ADT	STMicroelectronics	14-SOIC	2V~32V, ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-55°C ~ 125°C	Active
LM139DT	STMicroelectronics	14-SOIC	2V~32V, ±1V~16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2mA	-55°C ~ 125°C	Active
LM239ADT	STMicroelectronics	14-SOIC	2V~32V, ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Active
LM239DT	STMicroelectronics	14-SOIC	2V~32V, ±1V~16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Active
LM2901DT	STMicroelectronics	14-SOIC	2V~32V, ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2901HYDT	STMicroelectronics	14-SOIC	2V~36V, ±1V~18V	—	—	—	2.5mA	—	Active
LM2901YDT	STMicroelectronics	14-SOIC	2V~32V, ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended for Drop-In Replacement)

LM139DT and LM239DT from STMicroelectronics are the closest parametric matches to the LM339DRG3. Both maintain the 14-SOIC package, support the required supply voltage range, and deliver equivalent input offset voltage (5mV @ 30V) and input bias current (0.25µA @ 5V) specifications. Both parts are in Active product status with extended operating temperature ranges (-40°C to 105°C or -55°C to 125°C), ensuring long-term availability and supply chain stability. These parts are ROHS3 compliant and carry identical regulatory certifications.

Enhanced Performance Alternatives

LM139ADT and LM239ADT offer improved input offset voltage (2mV @ 30V) and reduced input bias current (0.1µA @ 5V) compared to the LM339DRG3, with Active product status and extended temperature ranges. These parts are suitable for applications requiring tighter input specifications while maintaining full functional compatibility.

Extended Supply Voltage Range Option

LM2901HYDT supports an expanded supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) and is qualified to AEC-Q100 automotive standards. This part is appropriate for applications requiring automotive-grade reliability or operation beyond standard voltage limits.

Package Consideration

BA2901SF-E2 from Rohm Semiconductor uses a 14-SOP package (0.173", 4.40mm width) instead of the standard 14-SOIC. This part is not a direct drop-in replacement due to package geometry differences and requires PCB layout modification. Selection of this part should be limited to new designs where package footprint adjustment is feasible.

Frequently Asked Questions (FAQ)

Q: Can LM139DT directly replace LM339DRG3 without PCB modifications?

A: Yes. LM139DT shares the identical 14-SOIC package footprint (0.154", 3.90mm width) and pinout with LM339DRG3. The parametric specifications are compatible across all critical operating parameters. No PCB layout changes are required.

Q: What is the difference between LM139DT and LM239DT?

A: Both parts are functionally equivalent in 14-SOIC packages with identical supply voltage ranges and output current ratings. LM239DT operates across -40°C to 105°C, while LM139DT extends to -55°C to 125°C. Selection depends on the required operating temperature range for your application.

Q: Why is LM339DR listed as Obsolete?

A: LM339DR from Rohm Semiconductor has reached end-of-life status. While parametrically compatible, this part should not be selected for new designs due to unavailability. Active alternatives such as LM139DT or LM239DT are preferred.

Q: Is BA2901SF-E2 a suitable replacement?

A: BA2901SF-E2 is functionally equivalent but uses a 14-SOP package with different physical dimensions (0.173", 4.40mm width versus 0.154", 3.90mm width for 14-SOIC). This package difference requires PCB footprint redesign and is not recommended for direct substitution in existing designs.

Q: What does AEC-Q100 qualification mean for LM2901HYDT and LM2901YDT?

A: AEC-Q100 qualification indicates these parts meet automotive industry reliability and quality standards. These parts are suitable for automotive applications and environments requiring enhanced reliability screening. Standard industrial-grade parts (LM139DT, LM239DT) are appropriate for non-automotive applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and are REACH unaffected, matching the regulatory status of the LM339DRG3.

Q: Which substitute offers the best input offset voltage performance?

A: LM139AD and LM139ADT both specify 2mV maximum input offset voltage at 30V, compared to 5mV for the LM339DRG3. These parts are suitable for applications requiring tighter input precision. LM139ADT is preferred due to Active product status.

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