LM339DRE4 Equivalent & Substitute Parts

Part Overview

The LM339DRE4 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 suitable for low-power applications requiring voltage comparison across a wide supply range of 2V to 30V (single supply) or ±1V to ±15V (dual supply).

The LM339DRE4 carries an obsolete product status, making equivalent and substitute parts necessary for ongoing design support, production continuity, and long-term component availability. Identifying compatible alternatives ensures design flexibility and supply chain resilience.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LM339DRE4
Category	Linear Comparator
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
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM339DRE4 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

Package type: 14-SOIC surface-mount form factor
Number of comparator elements: 4 independent channels
Output configuration: Open-Collector topology
Supply voltage range: Minimum 2V ~ 30V single supply or ±1V ~ ±15V dual supply compatibility
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
Operating temperature range: 0°C ~ 70°C minimum
RoHS3 compliance and MSL Level 1 rating

Substitute parts are grouped into two categories:

MFR Recommended Substitutes: Parts explicitly recommended by manufacturers with active or last-time-buy status, meeting or exceeding all electrical specifications and maintaining identical package geometry.

Parametric Equivalents: Parts with compatible electrical characteristics and package compatibility but differing product status or minor specification variations within acceptable engineering tolerances.

Parameter Comparison

Part Number	Manufacturer	Product Status	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Temp Range	Output Type
LM339DRE4	Texas Instruments	Obsolete	14-SOIC	2V~30V, ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Open-Collector
LM139AD	Texas Instruments	Last Time Buy	14-SOIC	2V~30V, ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	Open-Collector, Open-Drain
LM339AM/NOPB	National Semiconductor	Active	14-SOIC	2V~36V, ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector
LM339AMX/NOPB	Texas Instruments	Active	14-SOIC	2V~36V, ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector
LM339M/NOPB	Texas Instruments	Active	14-SOIC	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector
LM339MX/NOPB	Texas Instruments	Active	14-SOIC	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Open-Collector
LP339M/NOPB	Texas Instruments	Active	14-SOIC	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	14-SOIC	2V~36V, ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	CMOS, MOS, Open-Collector
LM339DR	Rohm Semiconductor	Obsolete	14-SOIC	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	14-SOIC	2V~30V, ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Open-Collector
BA2901SF-E2	Rohm Semiconductor	Active	14-SOP	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Open-Collector

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility):

LM339DRG3 is the closest direct replacement, maintaining identical electrical specifications, supply voltage range, and operating temperature window as the LM339DRE4. Both parts share the same base product number (LM339) and 14-SOIC package geometry. LM339DRG3 carries last-time-buy status with substantial inventory availability (21,985 pcs), ensuring near-term supply continuity.

Active Production Alternatives:

LM339AMX/NOPB and LM339MX/NOPB are active production parts from Texas Instruments with expanded supply voltage ranges (2V~36V vs. 2V~30V) and improved input offset specifications (2mV vs. 5mV). These parts maintain identical package geometry and are suitable for designs requiring extended voltage headroom. LM339AMX/NOPB offers the highest inventory level (25,850 pcs).

LM339AM/NOPB, manufactured by National Semiconductor, provides active production status with compatible electrical characteristics and identical operating temperature range. This part is suitable for applications where supply voltage expansion to 36V is beneficial.

Low-Power Alternative:

LP339M/NOPB and LP339MX/NOPB feature significantly reduced quiescent current (100µA vs. 2.5mA) and input bias current (0.025µA vs. 0.25µA), making them suitable for battery-powered or ultra-low-power applications. Output current capability is reduced to 10mA typical, requiring verification against load requirements.

Extended Temperature Range Option:

LM139AD provides extended operating temperature range (-55°C to 125°C) with improved input offset (2mV) and reduced quiescent current (2mA). This part is suitable for industrial or automotive applications requiring wider temperature operation. Last-time-buy status applies.

Package Variant (14-SOP):

BA2901SF-E2 from Rohm Semiconductor offers active production status with extended temperature range (-40°C to 105°C) but uses a 14-SOP package (4.40mm width) instead of 14-SOIC (3.90mm width). PCB layout modification is required. This part is suitable only when package footprint change is acceptable.

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can LM339MX/NOPB directly replace LM339DRE4 without circuit modification?

A: Yes. LM339MX/NOPB maintains identical 14-SOIC package geometry, open-collector output configuration, and operating temperature range (0°C ~ 70°C). The expanded supply voltage range (2V~36V vs. 2V~30V) and improved input offset specification (5mV vs. 5mV) are backward-compatible. No circuit modification is required.

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

A: Both parts are functionally equivalent with identical electrical specifications and package geometry. LM339AMX/NOPB is packaged in Cut Tape (CT) & Digi-Reel format, while LM339MX/NOPB is supplied in Tube packaging. Selection depends on procurement and assembly requirements. LM339AMX/NOPB offers higher inventory availability (25,850 pcs vs. 58,515 pcs for LM339MX/NOPB).

Q: Why would I choose LP339MX/NOPB over LM339MX/NOPB?

A: LP339MX/NOPB is selected for applications requiring ultra-low quiescent current (100µA vs. 2.5mA) and minimal input bias current (0.025µA vs. 0.25µA). This is critical for battery-powered designs or applications with strict power consumption budgets. The trade-off is reduced output current capability (10mA vs. 16mA), which must be verified against load requirements.

Q: Is BA2901SF-E2 a suitable replacement for LM339DRE4?

A: BA2901SF-E2 is electrically compatible but uses a 14-SOP package (4.40mm width) instead of 14-SOIC (3.90mm width). PCB layout and footprint modification is required. This part is suitable only when package change is acceptable. The extended temperature range (-40°C to 105°C) and active production status are advantages for industrial applications.

Q: What is the significance of "Last Time Buy" status for LM339DRG3?

A: Last-time-buy status indicates the manufacturer will discontinue production after a specified date. LM339DRG3 remains available with substantial inventory (21,985 pcs), providing a transition window for design migration. For long-term production, active-status alternatives such as LM339MX/NOPB or LM339AMX/NOPB are recommended.

Q: Can I use LM139AD as a direct replacement?

A: LM139AD is electrically compatible with identical 14-SOIC package geometry and open-collector output. However, it features extended operating temperature range (-55°C to 125°C) and improved specifications (2mV input offset, 2mA quiescent current). It carries last-time-buy status. Use LM139AD when extended temperature operation is required; otherwise, active-production alternatives are preferred for long-term supply assurance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes and storage requirements.

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