LM339DG Equivalent & Substitute Parts

Part Overview

The LM339DG is a general-purpose quad comparator IC manufactured by onsemi in 14-SOIC surface-mount packaging. This device integrates four independent voltage comparators with CMOS, open-collector, and TTL output configurations, operating across a wide supply voltage range of 3V to 36V (single supply) or ±1.5V to ±18V (dual supply). The LM339DG is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Part Number	LM339DG
Category	Linear Comparator
Number of Elements	4
Output Type	CMOS, Open-Collector, TTL
Voltage Supply (Single/Dual)	3V ~ 36V / ±1.5V ~ 18V
Input Offset Voltage (Max)	5mV @ 5V
Input Bias Current (Max)	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V
Quiescent Current (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Package	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LM339DG are classified based on strict electrical and mechanical compatibility criteria:

Direct Substitutes maintain identical or superior electrical performance within the same package footprint (14-SOIC). These parts share the same base product number (LM339) or functionally equivalent designs with matching pin configurations and output characteristics.

Upgrade Options provide enhanced specifications such as extended operating temperature ranges (-40°C to 85°C) or improved input offset voltage performance, while maintaining functional compatibility in the same package class.

Similar Alternatives offer equivalent functionality with different manufacturers or package variants (14-SO, 14-SOP) but require PCB layout verification due to package dimension variations.

Critical substitution parameters:

Number of comparators: 4 elements (mandatory)
Output type: Open-Collector configuration (primary requirement)
Supply voltage range: Minimum 2V ~ 36V single supply or ±1V ~ 18V dual supply
Package footprint: 14-SOIC or compatible 14-pin surface-mount variants
Input offset voltage: ≤7mV @ 5V
Input bias current: ≤0.25µA @ 5V

Parameter Comparison

Part Number	Manufacturer	Product Status	Supply Voltage	Input Offset (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Package	Output Type
LM339DG	onsemi	Obsolete	3V~36V / ±1.5V~18V	5mV @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-SOIC	CMOS, Open-Collector, TTL
LM339D	STMicroelectronics	Active	2V~32V / ±1V~16V	5mV @ 30V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-SOIC	CMOS, DTL, ECL, MOS, Open-Collector, TTL
LM339DRG3	Texas Instruments	Last Time Buy	2V~30V / ±1V~15V	5mV @ 30V	20mA	2.5mA	0°C ~ 70°C	14-SOIC	Open-Collector
LM2901MX	onsemi	Obsolete	2V~36V / ±1V~18V	7mV @ 5V	18mA @ 5V	2.5mA	-40°C ~ 85°C	14-SOIC	DTL, MOS, Open-Collector, TTL
AS339AMTR-E1	Diodes Incorporated	Active	2V~36V / ±1V~18V	3mV @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	14-SOIC	Open-Collector
AS339MTR-E1	Diodes Incorporated	Active	2V~36V / ±1V~18V	5mV @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	14-SOIC	Open-Collector
AS339MTR-G1	Diodes Incorporated	Active	2V~36V / ±1V~18V	5mV @ 5V	16mA	2mA	-40°C ~ 85°C	14-SOIC	Open-Collector
BA2901SF-E2	Rohm Semiconductor	Active	2V~36V / ±1V~18V	7mV @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-SOP	Open-Collector
LM139AJ/PB	Texas Instruments	Active	2V~36V / ±1V~18V	2mV @ 30V	16mA @ 5V	2.5mA	-55°C ~ 125°C	14-CDIP	Open-Collector, Open-Drain
LM139DT	STMicroelectronics	Active	2V~32V / ±1V~16V	5mV @ 30V	16mA @ 5V	2mA	-55°C ~ 125°C	14-SOIC	Open-Collector

Engineering Selection Recommendations

Direct Replacement (Active Status): LM339D (STMicroelectronics) and LM339DRG3 (Texas Instruments) are the primary direct replacements. Both maintain 14-SOIC packaging, four-element comparator configuration, and open-collector output compatibility. LM339D is currently active in production, making it the preferred choice for new designs. LM339DRG3 carries Last Time Buy status, suitable for existing production runs with known lead times.

Extended Temperature Range Upgrade: AS339AMTR-E1, AS339MTR-E1, and AS339MTR-G1 (Diodes Incorporated) provide -40°C to 85°C operating range compared to the original 0°C to 70°C specification. These parts are active and offer improved input offset voltage (3mV for AS339AMTR-E1). All three maintain 14-SOIC packaging and open-collector output.

Enhanced Temperature Performance: BA2901SF-E2 (Rohm Semiconductor) extends operating temperature to -40°C to 105°C with 14-SOP packaging. This variant requires PCB layout verification due to package dimension differences (4.40mm width versus 3.90mm standard).

Through-Hole Alternative: LM139AJ/PB (Texas Instruments) and LM139DT (STMicroelectronics) offer through-hole (14-CDIP) and surface-mount (14-SOIC) options respectively, with extended temperature ranges (-55°C to 125°C). These are suitable for legacy designs or applications requiring wide temperature operation.

Compliance Considerations: All substitute parts listed carry ROHS3 compliance and REACH Unaffected status, matching the original part's regulatory requirements. Moisture sensitivity levels range from 1 (Unlimited) to 3 (168 Hours), with most active parts rated MSL-1 or MSL-3.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LM339DG with LM339D? A: Yes. LM339D (STMicroelectronics) is a direct replacement maintaining identical 14-SOIC packaging, four-element configuration, and open-collector output. Electrical specifications are equivalent within the specified operating temperature range of 0°C to 70°C.

Q: What is the difference between LM339D and AS339AMTR-E1? A: Both are quad comparators in 14-SOIC packaging with open-collector outputs. AS339AMTR-E1 offers extended operating temperature (-40°C to 85°C versus 0°C to 70°C) and superior input offset voltage (3mV versus 5mV). AS339AMTR-E1 is manufactured by Diodes Incorporated and is currently active in production.

Q: Can I use BA2901SF-E2 as a substitute? A: BA2901SF-E2 is functionally equivalent but uses 14-SOP packaging with 4.40mm width instead of the standard 14-SOIC 3.90mm width. PCB layout verification is required to confirm footprint compatibility. The part offers extended temperature range (-40°C to 105°C) and is currently active.

Q: Why would I choose LM139DT over LM339D? A: LM139DT (STMicroelectronics) provides extended operating temperature range (-55°C to 125°C) compared to LM339D (0°C to 70°C). Both use 14-SOIC packaging. LM139DT is suitable for applications requiring wider temperature operation or legacy design compatibility.

Q: Are all substitute parts RoHS compliant? A: Yes. All substitute parts listed carry ROHS3 compliance and REACH Unaffected status, matching the regulatory requirements of the original LM339DG.

Q: What is the difference between AS339AMTR-E1 and AS339MTR-E1? A: Both are Diodes Incorporated quad comparators in 14-SOIC packaging with -40°C to 85°C operating range. AS339AMTR-E1 has superior input offset voltage (3mV @ 5V) and lower quiescent current (2mA). AS339MTR-E1 has standard input offset voltage (5mV @ 5V). Packaging differs: AMTR uses Tape & Reel, MTR-E1 uses Cut Tape & Digi-Reel.

Q: Can I use LM2901MX as a substitute? A: LM2901MX is functionally compatible with extended operating temperature (-40°C to 85°C) and wider supply voltage range (2V to 36V). However, it is classified as obsolete. For new designs, active alternatives like AS339AMTR-E1 are recommended.

Q: What packaging options are available for quad comparator substitutes? A: Primary options are 14-SOIC (surface-mount, 3.90mm width), 14-SOP (surface-mount, 4.40mm width), and 14-CDIP (through-hole, 7.62mm). Verify PCB footprint compatibility before selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message