LM239AMPWREP Equivalent & Substitute Parts

Part Overview

The LM239AMPWREP is a general-purpose comparator IC manufactured by Texas Instruments, featuring four differential comparators with open-collector outputs in a 14-TSSOP surface-mount package. This device operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), making it suitable for analog signal comparison applications in industrial and consumer electronics.

The part is currently in active production status with 1150 units in stock. Alternative models become necessary when addressing specific application requirements such as extended temperature ranges, different output types, alternative packaging formats, or sourcing constraints from different manufacturers while maintaining functional equivalence.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM239AMPWREP
Manufacturer	Texas Instruments
Category	Linear
Type	General Purpose Comparator
Number of Elements	4
Output Type	Open-Collector
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	2.5mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2mA
Operating Temperature	-55°C ~ 125°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the LM239AMPWREP is determined by the following critical parameters:

Functional Equivalence Criteria:

Four differential comparators per package
Open-collector or compatible output configuration
Supply voltage range compatibility (minimum 2V ~ 36V single supply or ±1V ~ ±18V dual supply)
Input offset voltage within acceptable tolerance
Input bias current specifications
Output current capability (minimum 16mA typical)
Quiescent current within 2.5mA maximum

Package Compatibility:

14-pin surface-mount packages (TSSOP, SSOP, SOIC variants)
0.173" to 0.154" body width tolerance
Pin-compatible footprints

Environmental & Compliance:

Operating temperature range overlap with application requirements
RoHS3 compliance
MSL rating suitable for assembly processes

Substitute parts are grouped into two categories: Direct Pin-Compatible Substitutes (identical package and pinout) and Functional Equivalents (same electrical performance with package variations).

Parameter Comparison

Parameter	LM239AMPWREP (TI)	BA2901SFV-E2 (Rohm)	LM239APT (STM)	LM239DTBR2G (onsemi)	LM239PT (STM)	LM2901PT (STM)	LM2901S14-13 (Diodes)	LM2901T14-13 (Diodes)	LM2901YPT (STM)	LM339APT (STM)	LM339PT (STM)
Number of Elements	4	4	4	4	4	4	4	4	4	4	4
Output Type	Open-Collector	Open-Collector	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	Not specified	Not specified	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 32V, ±1V ~ 16V	3V ~ 36V, ±1.5V ~ 18V	2V ~ 32V, ±1V ~ 16V	2V ~ 32V, ±1V ~ 16V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 32V, ±1V ~ 16V	2V ~ 32V, ±1V ~ 16V	2V ~ 32V, ±1V ~ 16V
Voltage - Input Offset (Max)	2.5mV @ 30V	7mV @ 5V	2mV @ 30V	5mV @ 5V	5mV @ 30V	7mV @ 5V	7mV @ 5V	7mV @ 5V	7mV @ 5V	2mV @ 30V	5mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V	0.25µA @ 5V	0.1µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.1µA @ 5V	0.25µA @ 5V
Current - Output (Typ)	20mA	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V
Current - Quiescent (Max)	2mA	2mA	2mA	2.5mA	2mA	2.5mA	2.5mA	2.5mA	2.5mA	2.5mA	2.5mA
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	-25°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	14-TSSOP	14-LSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-SOIC	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Identical Package & Pinout):

LM239PT and LM239APT (STMicroelectronics) are the primary direct substitutes for the LM239AMPWREP. Both maintain the 14-TSSOP package, identical pinout, and operate within the full supply voltage range. LM239PT offers the highest inventory availability (65,200 units) with input offset voltage of 5mV @ 30V. LM239APT provides superior input offset voltage performance at 2mV @ 30V with lower input bias current (0.1µA @ 5V), though with reduced operating temperature range (-40°C to 105°C versus -55°C to 125°C).

LM2901PT (STMicroelectronics) maintains full temperature range coverage (-40°C to 125°C) and 14-TSSOP packaging with equivalent electrical performance, offering 26,244 units in stock.

Tier 2 - Package-Compatible Substitutes:

LM239DTBR2G (onsemi) provides 14-TSSOP packaging with 6,540 units available. Operating temperature range is restricted to -25°C to 85°C, limiting use in extended temperature applications. Supply voltage minimum is raised to 3V single supply.

LM2901T14-13 (Diodes Incorporated) offers 14-TSSOP packaging with full supply voltage range compatibility and extended temperature operation (-40°C to 125°C). MSL rating is 3 (168 Hours) versus MSL 1 for the primary part.

Tier 3 - Alternative Package Formats:

BA2901SFV-E2 (Rohm Semiconductor) provides 14-LSSOP packaging (0.173" width, compatible footprint) with 4,664 units in stock. Operating temperature is limited to -40°C to 105°C.

LM2901S14-13 (Diodes Incorporated) uses 14-SOIC packaging (0.154" width), requiring PCB layout modification. Full supply voltage range and extended temperature operation (-40°C to 125°C) are supported.

Tier 4 - Functional Equivalents with Restricted Operating Range:

LM339APT and LM339PT (STMicroelectronics) are functionally equivalent four-comparator devices with restricted operating temperature range (0°C to 70°C), suitable only for commercial-grade applications. LM339PT provides the highest inventory (84,090 units).

Tier 5 - Automotive-Grade Alternative:

LM2901YPT (STMicroelectronics) is AEC-Q100 qualified for automotive applications with 55,300 units in stock. Operating temperature extends to -40°C to 125°C with MSL 1 rating. Supply voltage range is limited to 2V ~ 32V (±1V ~ 16V).

All substitute parts maintain ROHS3 compliance and active production status. Selection should prioritize Tier 1 substitutes for applications requiring full parameter compatibility. Tier 2 and 3 options address specific sourcing or packaging constraints. Tier 4 parts are suitable only for commercial temperature range applications. Tier 5 selection is restricted to automotive-qualified designs.

Frequently Asked Questions (FAQ)

Q: Can LM239PT be used as a direct replacement for LM239AMPWREP?

A: Yes. LM239PT maintains identical 14-TSSOP packaging, pinout, and supply voltage range (2V ~ 36V single supply, ±1V ~ 18V dual supply). Input offset voltage is 5mV @ 30V versus 2.5mV @ 30V for the original part. Operating temperature range is -40°C to 105°C, which is narrower than the original -55°C to 125°C specification.

Q: What is the difference between LM239APT and LM2901PT?

A: Both are STMicroelectronics parts in 14-TSSOP packaging. LM239APT has superior input offset voltage (2mV @ 30V) and lower input bias current (0.1µA @ 5V), but operates only to 105°C. LM2901PT extends to 125°C maximum temperature with input offset voltage of 7mV @ 5V and standard input bias current of 0.25µA @ 5V.

Q: Is BA2901SFV-E2 pin-compatible with LM239AMPWREP?

A: BA2901SFV-E2 uses 14-LSSOP packaging versus 14-TSSOP for the original part. While both are 0.173" width surface-mount packages with 14 pins, the LSSOP variant has different lead geometry. PCB footprint compatibility must be verified before substitution. Electrical performance is equivalent.

Q: Can LM339PT replace LM239AMPWREP?

A: LM339PT is functionally equivalent but with restricted operating temperature range (0°C to 70°C). It is suitable only for commercial-grade applications operating within this temperature window. Extended temperature applications require LM239PT, LM239APT, or LM2901PT.

Q: What is the significance of MSL rating differences?

A: LM239AMPWREP has MSL 1 (Unlimited moisture sensitivity level), allowing indefinite shelf storage without baking. LM2901T14-13 and LM2901S14-13 have MSL 3 (168 Hours), requiring moisture baking before assembly if shelf time exceeds 168 hours in standard humidity conditions. This affects supply chain handling and assembly scheduling.

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

A: LM239APT and LM339APT both specify 2mV @ 30V input offset voltage, matching the original LM239AMPWREP at 2.5mV @ 30V. LM239APT is preferred for extended temperature applications up to 105°C.

Q: Is LM2901YPT suitable for non-automotive applications?

A: LM2901YPT is AEC-Q100 qualified for automotive use but can be applied to non-automotive designs. However, it has restricted supply voltage range (2V ~ 32V single supply versus 2V ~ 36V for the original part) and higher cost due to automotive qualification. Standard industrial-grade alternatives are more economical for non-automotive applications.

Q: What package alternatives are available if 14-TSSOP is not suitable?

A: LM2901S14-13 provides 14-SOIC packaging (0.154" width) with full electrical equivalence and extended temperature range. BA2901SFV-E2 offers 14-LSSOP packaging (0.173" width) as a near-compatible alternative. Both require PCB layout verification before substitution.

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