LM239DR2 Equivalent & Substitute Parts

Part Overview

The LM239DR2 is a quad comparator integrated circuit manufactured by onsemi in 14-SOIC surface mount packaging. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The LM239DR2 operates as a general-purpose comparator with open-collector output configuration, suitable for voltage comparison applications across industrial and commercial temperature ranges.

Key Parameters

Parameter	LM239DR2
Manufacturer	onsemi
Base Product Number	LM239
Package Type	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Number of Elements	4
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM239DR2 is determined by the following critical parameters: package type (14-SOIC surface mount), number of comparator elements (4), output type compatibility (open-collector), supply voltage range, input offset voltage, and product status. Parts are grouped into three categories based on substitution suitability:

Direct Substitutes maintain identical or superior electrical specifications and package compatibility, enabling pin-for-pin replacement without circuit modification.

Upgrade Substitutes offer enhanced performance characteristics or improved product status (active vs. obsolete) while maintaining functional compatibility, though package variants may differ.

Similar Alternatives share the same base product number and core functionality but differ in packaging, mounting type, or temperature rating, requiring design evaluation for specific applications.

Parameter Comparison

Part Number	Manufacturer	Package	Mounting	Elements	Output Type	Supply Voltage (Single/Dual)	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Product Status	RoHS Status
LM239DR2	onsemi	14-SOIC	Surface Mount	4	Open-Collector	3V ~ 36V, ±1.5V ~ 18V	—	—	—	—	-25°C ~ 85°C	Obsolete	RoHS non-compliant
LM239DR2G	onsemi	14-SOIC	Surface Mount	4	CMOS, Open-Collector, TTL	3V ~ 36V, ±1.5V ~ 18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-25°C ~ 85°C	Active	ROHS3 Compliant
LM239AQDRQ1	Texas Instruments	14-SOIC	Surface Mount	4	Open-Collector	2V ~ 36V, ±1V ~ 18V	2.5mV @ 30V	0.25µA @ 5V	20mA	2mA	-40°C ~ 125°C	Active	ROHS3 Compliant
LM2901D	STMicroelectronics	14-SOIC	Surface Mount	4	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V ~ 32V, ±1V ~ 16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active	ROHS3 Compliant
LM2901MX	onsemi	14-SOIC	Surface Mount	4	DTL, MOS, Open-Collector, TTL	2V ~ 36V, ±1V ~ 18V	7mV @ 5V	0.25µA @ 5V	18mA @ 5V	2.5mA	-40°C ~ 85°C	Obsolete	ROHS3 Compliant
LM239J	Texas Instruments	14-CDIP	Through Hole	4	Open-Collector	2V ~ 36V, ±1V ~ 18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	-25°C ~ 85°C	Active	ROHS3 Compliant
LM239PT	STMicroelectronics	14-TSSOP	Surface Mount	4	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V ~ 32V, ±1V ~ 16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Active	ROHS3 Compliant
LM2901Q4T	STMicroelectronics	16-QFN (3x3)	Surface Mount	4	CMOS, DTL, MOS, Open-Collector, TTL	2V ~ 36V, ±1V ~ 18V	—	—	—	2.5mA	—	Active	ROHS3 Compliant
LM339APT	STMicroelectronics	14-TSSOP	Surface Mount	4	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V ~ 32V, ±1V ~ 16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitution (Pin-Compatible Replacement)

LM239DR2G is the primary direct substitute, offering identical 14-SOIC packaging and surface mount configuration. This part maintains the same supply voltage range and operating temperature window as the original LM239DR2. The transition from obsolete to active product status and RoHS3 compliance provides regulatory advantage for new designs and ongoing procurement.

Enhanced Performance Substitutes

LM239AQDRQ1 (Texas Instruments) provides extended operating temperature range (-40°C to 125°C) and improved input offset voltage specification (2.5mV maximum). This part includes AEC-Q100 automotive qualification, suitable for applications requiring enhanced reliability. LM2901D (STMicroelectronics) offers similar temperature extension with active product status and RoHS3 compliance.

Package Variant Alternatives

LM239PT (STMicroelectronics) maintains the LM239 base product number in 14-TSSOP packaging, offering reduced footprint for space-constrained applications. LM239J (Texas Instruments) provides through-hole 14-CDIP packaging for legacy board designs. LM2901Q4T (STMicroelectronics) offers compact 16-QFN packaging for high-density layouts.

Compliance Considerations

All recommended active substitutes are RoHS3 compliant, addressing regulatory requirements for new product development. The original LM239DR2 is RoHS non-compliant; substitution is necessary for compliance-mandated applications.

Frequently Asked Questions (FAQ)

Q: Can LM239DR2G replace LM239DR2 without circuit modification?

A: Yes. LM239DR2G is a direct pin-compatible substitute with identical 14-SOIC packaging, mounting type, and electrical operating range. No PCB layout changes are required.

Q: What is the primary advantage of LM239AQDRQ1 over LM239DR2G?

A: LM239AQDRQ1 extends the operating temperature range to -40°C to 125°C and includes AEC-Q100 automotive qualification. Input offset voltage is also improved to 2.5mV maximum. Select this part for automotive or extended-temperature applications.

Q: Can I use LM239PT as a substitute if my PCB layout permits package change?

A: Yes. LM239PT maintains the LM239 base product number and equivalent electrical specifications in 14-TSSOP packaging. This package offers smaller footprint than 14-SOIC. PCB layout modification is required.

Q: Is LM239J suitable for new surface mount designs?

A: No. LM239J is through-hole 14-CDIP packaging, intended for legacy designs. For new surface mount applications, select LM239DR2G, LM239PT, or LM2901Q4T.

Q: What is the difference between LM2901D and LM239DR2G?

A: Both are quad comparators with active product status and RoHS3 compliance. LM2901D is based on the LM2901 product line with extended temperature range (-40°C to 125°C). LM239DR2G maintains the LM239 product line. Electrical performance is equivalent; selection depends on product line preference and temperature requirements.

Q: Does LM2901Q4T offer advantages over LM239PT?

A: LM2901Q4T uses 16-QFN packaging, providing higher density integration than 14-TSSOP. Both are active, RoHS3 compliant. Select LM2901Q4T for space-constrained applications; select LM239PT for standard density layouts.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed are RoHS3 compliant. LM2901MX is RoHS3 compliant but obsolete. The original LM239DR2 is RoHS non-compliant.

Q: What supply voltage range should I verify for my application?

A: Verify that your circuit supply voltage falls within the specified range for the selected substitute. LM239DR2G and LM239AQDRQ1 support 3V to 36V single supply or ±1.5V to ±18V dual supply. LM239PT and LM2901D support 2V to 32V single supply or ±1V to ±16V dual supply. Confirm compatibility before final part selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message