LM339D Equivalent & Substitute Parts

Part Overview

The LM339D is a general-purpose quad comparator manufactured by Texas Instruments, housed in a 14-SOIC surface-mount package. 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 LM339D is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts is essential for design continuity, long-term sourcing reliability, and production planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM339D
Manufacturer	Texas Instruments
Type	General Purpose 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)	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	Last Time Buy
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM339D is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Parameters:

Package type: 14-SOIC surface-mount form factor
Number of comparator elements: 4
Output configuration: Open-Collector or compatible output type
Supply voltage range: Minimum 2V to 30V single supply capability
Input offset voltage: Maximum 5mV or better
Input bias current: Maximum 0.25µA or better
Output current capability: Minimum 16mA typical
Quiescent current: Maximum 2.5mA or better
Operating temperature range: Minimum 0°C to 70°C coverage
RoHS and REACH compliance status

Substitute parts are categorized as follows:

MFR Recommended Substitutes: Parts meeting all critical parameters with active or last-time-buy status, suitable for direct replacement.

Parametric Equivalents: Parts with identical electrical specifications and package, differing only in product status or minor packaging variants.

Upgrade Options: Parts exceeding the LM339D specifications (wider temperature range, improved performance metrics, active product status) while maintaining package and pin compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Type	Supply Voltage Range	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Product Status	Packaging
LM339D	Texas Instruments	Open-Collector	2V~30V, ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Last Time Buy	Tube
LM339DR	Rohm Semiconductor	CMOS, MOS, Open-Collector, TTL	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Obsolete	14-SOIC
LM139AD	Texas Instruments	Open-Collector, Open-Drain	2V~30V, ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	Last Time Buy	14-SOIC
LM339AM/NOPB	National Semiconductor	Open-Collector	2V~36V, ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active	14-SOIC
LM339AMX/NOPB	Texas Instruments	Open-Collector	2V~36V, ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active	Cut Tape (CT) & Digi-Reel®
LM339M/NOPB	Texas Instruments	Open-Collector	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active	Tube
LP339M/NOPB	Texas Instruments	CMOS, MOS, Open-Collector	2V~36V, ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	Active	Tube
LP339MX/NOPB	Texas Instruments	CMOS, MOS, Open-Collector	2V~36V, ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	Active	Cut Tape (CT) & Digi-Reel®
LM339DE4	Texas Instruments	Open-Collector	2V~30V, ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Last Time Buy	14-SOIC
LM339DG4	Texas Instruments	Open-Collector	2V~30V, ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	0°C ~ 70°C	Last Time Buy	14-SOIC
LM2901AS14-13	Diodes Incorporated	Open-Collector	2V~36V, ±1V~18V	2mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): LM339DE4 and LM339DG4 are parametric equivalents to the LM339D, maintaining identical electrical specifications and 14-SOIC packaging. Both are Last Time Buy status, consistent with the original part.

For Active Product Status with Extended Supply Range: LM339AMX/NOPB and LM339AM/NOPB offer active product status with expanded supply voltage range (2V~36V vs. 2V~30V) and improved input offset voltage (2mV vs. 5mV). These parts are suitable for new designs requiring long-term availability. LM339AMX/NOPB is available in Cut Tape & Digi-Reel packaging for automated assembly.

For Low-Power Applications: LP339MX/NOPB and LP339M/NOPB provide significantly reduced quiescent current (100µA vs. 2.5mA) and input bias current (0.025µA vs. 0.25µA), with CMOS/MOS output configuration. These are appropriate for battery-powered or low-power designs where the LM339D's output current capability (10mA vs. 20mA) is sufficient.

For Extended Temperature Range: LM139AD extends the operating temperature range to -55°C ~ 125°C while maintaining open-collector output and 14-SOIC packaging. This part is suitable for industrial or automotive applications requiring wider temperature coverage.

For Active Status with Widest Specifications: LM2901AS14-13 from Diodes Incorporated offers active product status, extended temperature range (-40°C ~ 125°C), and expanded supply voltage range (2V~36V, ±1V~18V). This part is available in Tape & Reel packaging for high-volume production.

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, consistent with the original LM339D.

Frequently Asked Questions (FAQ)

Q: Can I use LM339AMX/NOPB as a direct replacement for LM339D? A: Yes. LM339AMX/NOPB meets all critical electrical parameters of the LM339D (4-element open-collector comparator, 14-SOIC package, compatible supply voltage and operating temperature ranges). The primary advantage is active product status, ensuring long-term availability. The packaging format differs (Cut Tape & Digi-Reel vs. Tube), which may affect procurement and handling procedures.

Q: What is the difference between LM339D and LP339MX/NOPB? A: Both are quad comparators in 14-SOIC packages with active status. LP339MX/NOPB features CMOS/MOS output configuration versus LM339D's open-collector output. LP339MX/NOPB has significantly lower quiescent current (100µA vs. 2.5mA) and input bias current (0.025µA vs. 0.25µA), making it suitable for low-power applications. However, LP339MX/NOPB's typical output current is 10mA compared to LM339D's 20mA, which may limit drive capability in high-impedance load applications.

Q: Why is LM339DR listed as obsolete? A: LM339DR is manufactured by Rohm Semiconductor and carries obsolete product status, indicating it is no longer in active production. While it meets the electrical specifications for substitution, sourcing may be limited to existing inventory. For new designs, active-status alternatives such as LM339AMX/NOPB or LM2901AS14-13 are recommended.

Q: Is LM139AD compatible with the LM339D? A: LM139AD is compatible in terms of package (14-SOIC), element count (4), and output type (open-collector). However, LM139AD extends the operating temperature range to -55°C ~ 125°C, which is wider than LM339D's 0°C ~ 70°C. LM139AD also features improved input offset voltage (2mV vs. 5mV) and lower quiescent current (2mA vs. 2.5mA). Both are Last Time Buy status. LM139AD is suitable for applications requiring extended temperature operation.

Q: What packaging options are available for LM339 series substitutes? A: Substitute parts are available in multiple packaging formats: Tube (LM339M/NOPB, LP339M/NOPB), Cut Tape & Digi-Reel (LM339AMX/NOPB, LP339MX/NOPB), and Tape & Reel (LM2901AS14-13). All maintain the 14-SOIC surface-mount form factor. Selection depends on production volume and assembly automation requirements.

Q: Can I use LM2901AS14-13 in place of LM339D? A: Yes. LM2901AS14-13 is functionally compatible, offering quad comparator operation in 14-SOIC packaging with open-collector output. It provides superior specifications: active product status, extended temperature range (-40°C ~ 125°C), improved input offset voltage (2mV vs. 5mV), and expanded supply voltage range (2V~36V, ±1V~18V). The primary consideration is packaging format (Tape & Reel vs. Tube), which affects procurement and handling.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original LM339D. This ensures regulatory compliance for applications subject to environmental restrictions.

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