LM239PW Equivalent & Substitute Parts

Part Overview

The LM239PW is a general-purpose quad comparator IC manufactured by Texas Instruments in 14-TSSOP surface-mount packaging. This device integrates four independent voltage comparators with open-collector outputs, designed for applications requiring precision voltage comparison across industrial and commercial temperature ranges (-25°C to 85°C). The LM239PW is currently in Last Time Buy status, making equivalent substitute parts necessary for ongoing design support and procurement planning. Substitute parts must maintain functional equivalence through matching electrical specifications, package compatibility, and output characteristics while accommodating varying manufacturer implementations and product lifecycles.

Key Parameters

Parameter	LM239PW Specification
Number of Elements	4
Output Type	Open-Collector
Voltage Supply (Single/Dual)	2V ~ 30V / ±1V ~ 15V
Input Offset Voltage (Max)	5mV @ 30V
Input Bias Current (Max)	0.25µA @ 5V
Output Current (Typ)	20mA
Quiescent Current (Max)	2mA
Operating Temperature	-25°C ~ 85°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM239PW is determined by the following critical parameters:

Primary Substitution Criteria:

Four independent comparator elements
Open-collector or compatible output configuration
Supply voltage range encompassing 2V ~ 30V single supply or ±1V ~ 15V dual supply
14-TSSOP package footprint (0.173", 4.40mm width)
Surface-mount technology
ROHS3 compliance

Secondary Compatibility Factors:

Input offset voltage performance (5mV @ 30V baseline)
Input bias current (0.25µA @ 5V baseline)
Output current capability (20mA typical baseline)
Quiescent current (2mA maximum baseline)
Operating temperature range (-25°C ~ 85°C minimum requirement)
Moisture sensitivity level (MSL 1 preferred for unlimited shelf life)

Substitute parts are grouped into two categories: Direct Manufacturer Equivalents (same base product number, different packaging or grade) and Cross-Manufacturer Alternatives (different manufacturers with equivalent electrical performance and package compatibility).

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Type	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range	Package	MSL
LM239PW	Texas Instruments	Last Time Buy	Open-Collector	2V~30V / ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2mA	-25°C ~ 85°C	14-TSSOP	1
LM239PWR	Texas Instruments	Active	Open-Collector	2V~30V / ±1V~15V	5mV @ 30V	0.25µA @ 5V	20mA	2mA	-25°C ~ 85°C	14-TSSOP	1
LM239PT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V / ±1V~16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-TSSOP	1
LM239APT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V / ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-TSSOP	1
LM239DTBR2G	onsemi	Active	CMOS, Open-Collector, TTL	3V~36V / ±1.5V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-25°C ~ 85°C	14-TSSOP	1
BA2901SFV-E2	Rohm Semiconductor	Active	Open-Collector	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-LSSOP	1
LM2901AT14-13	Diodes Incorporated	Active	General Purpose	2V~36V / ±1V~18V	2mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-TSSOP	3
LM2901PT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V / ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-TSSOP	1
LM2901YPT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V / ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-TSSOP	1
LM339APT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V / ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-TSSOP	1
LM339PT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V / ±1V~16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-TSSOP	1

Engineering Selection Recommendations

Tier 1 - Preferred Direct Substitutes (Identical Electrical Performance):

LM239PWR (Texas Instruments) is the primary recommended substitute. This part maintains identical electrical specifications to the LM239PW while offering Active product status and superior inventory availability (68,435 units). The only difference is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect circuit performance. Both parts carry ROHS3 compliance and MSL 1 rating.

Tier 2 - Cross-Manufacturer Equivalents (Expanded Operating Range):

LM239PT and LM239APT (STMicroelectronics) provide extended operating temperature range (-40°C to 105°C) compared to the LM239PW (-25°C to 85°C), with identical 14-TSSOP packaging. LM239APT offers superior input offset voltage (2mV @ 30V) and lower input bias current (0.1µA @ 5V). Both maintain ROHS3 compliance and MSL 1 rating with Active product status.

LM239DTBR2G (onsemi) maintains the original temperature range (-25°C to 85°C) with expanded supply voltage capability (3V ~ 36V single supply). This part is suitable for applications requiring higher supply voltage tolerance while preserving thermal performance characteristics.

Tier 3 - LM2901 Series Alternatives (Extended Temperature Performance):

LM2901PT and LM2901YPT (STMicroelectronics) extend operating temperature to -40°C to 125°C, accommodating automotive and industrial applications. LM2901YPT carries AEC-Q100 automotive qualification. These parts use the LM2901 base product number but maintain functional equivalence through identical element count, output configuration, and package footprint.

Tier 4 - Cross-Manufacturer Alternatives (Specialized Applications):

BA2901SFV-E2 (Rohm Semiconductor) provides extended supply voltage range (2V ~ 36V single supply) and temperature range (-40°C to 105°C) in 14-LSSOP packaging. Package footprint compatibility requires PCB layout verification due to LSSOP versus TSSOP designation.

LM2901AT14-13 (Diodes Incorporated) offers the widest operating temperature range (-40°C to 125°C) with superior input offset voltage (2mV @ 5V). MSL 3 rating (168 hours) requires moisture control during storage and assembly.

Tier 5 - Limited Compatibility (Restricted Temperature Range):

LM339APT and LM339PT (STMicroelectronics) operate within 0°C to 70°C range, restricting use to commercial-grade applications. These parts are suitable only for designs not requiring the original -25°C lower temperature limit.

Frequently Asked Questions (FAQ)

Q: Can LM239PWR be used as a direct replacement for LM239PW in existing designs?

A: Yes. LM239PWR is electrically identical to LM239PW with matching supply voltage range (2V ~ 30V / ±1V ~ 15V), input offset voltage (5mV @ 30V), input bias current (0.25µA @ 5V), output current (20mA), and operating temperature (-25°C ~ 85°C). The only difference is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect circuit functionality. Both parts use 14-TSSOP surface-mount packaging with identical pinout and electrical behavior.

Q: What are the key differences between LM239 and LM2901 series parts?

A: Both series contain four independent comparators in 14-TSSOP packaging with open-collector outputs. The primary difference is operating temperature range: LM239 series operates -25°C to 85°C (or -40°C to 105°C for extended versions), while LM2901 series extends to -40°C to 125°C. Supply voltage specifications are comparable (2V ~ 30V to 2V ~ 32V single supply). Input offset voltage and bias current specifications are similar across both series. Selection depends on application temperature requirements.

Q: Is BA2901SFV-E2 compatible with LM239PW in terms of package footprint?

A: BA2901SFV-E2 uses 14-LSSOP packaging while LM239PW uses 14-TSSOP packaging. Although both are 14-pin surface-mount packages with 0.173" width and 4.40mm width specification, LSSOP and TSSOP have different pitch and pin configurations. PCB layout verification is required before substitution. Consult package datasheets for exact dimensional compatibility.

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

A: LM239APT and LM339APT (STMicroelectronics) and LM2901AT14-13 (Diodes Incorporated) all specify 2mV @ 30V or 2mV @ 5V input offset voltage, compared to LM239PW's 5mV @ 30V. These parts provide superior precision for applications requiring tighter voltage comparison accuracy. However, LM339APT and LM339PT operate only within 0°C to 70°C range, limiting use to commercial-grade applications.

Q: What is the significance of MSL rating when selecting a substitute?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. LM239PW and most substitute parts carry MSL 1 rating. LM2901AT14-13 carries MSL 3 (168 hours), requiring controlled storage and assembly conditions to prevent moisture absorption damage. For high-volume production or extended storage, MSL 1 parts are preferred to eliminate moisture bake-out procedures.

Q: Can LM2901YPT be used in automotive applications?

A: LM2901YPT carries AEC-Q100 automotive qualification and operates across -40°C to 125°C temperature range, making it suitable for automotive-grade designs. However, LM239PW is not automotive-qualified. Substitution into automotive applications requires design review and validation against automotive specifications and qualification requirements.

Q: What supply voltage range should I verify when selecting a substitute?

A: LM239PW operates with 2V ~ 30V single supply or ±1V ~ 15V dual supply. Most substitute parts maintain this range or expand it. LM239DTBR2G and BA2901SFV-E2 extend to 3V ~ 36V and 2V ~ 36V respectively, offering wider tolerance. Verify your circuit's actual supply voltage requirements against the substitute part's specification to ensure compatibility. Parts with narrower supply ranges (such as those limited to 2V ~ 32V) are still compatible with LM239PW applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance matching the LM239PW specification. This ensures compatibility with environmental regulations and procurement requirements across industrial and commercial applications.

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