LM2901PW Equivalent & Substitute Parts

Part Overview

The LM2901PW is a general-purpose comparator IC manufactured by Texas Instruments, featuring four differential comparators in a 14-TSSOP surface-mount package. This device operates across a wide supply voltage range (2V to 30V single supply, ±1V to ±15V dual supply) and is designed for open-collector output applications. The part is currently in Last Time Buy status, making identification of active equivalent and substitute parts essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2901PW
Manufacturer	Texas Instruments
Category	Linear Comparator
Number of Elements	4
Output Type	Open-Collector
Voltage Supply (Single/Dual)	2V ~ 30V / ±1V ~ 15V
Voltage - Input Offset (Max)	7mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	-40°C ~ 125°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the LM2901PW is determined by the following critical parameters:

Primary Compatibility Criteria:

Package type: 14-TSSOP or mechanically equivalent packages (14-SSOP, 14-SOIC)
Number of comparator elements: 4
Output configuration: Open-Collector or compatible output types
Supply voltage range: Must encompass or exceed 2V ~ 30V (single) and ±1V ~ ±15V (dual)
Operating temperature range: Must support -40°C ~ 125°C minimum
Input offset voltage: Maximum 7mV specification
Input bias current: Maximum 0.25µA specification
Output current capability: Minimum 16mA typical

Substitute parts are grouped into two categories:

Direct Pin-Compatible Substitutes – Parts with identical 14-TSSOP packaging and full parameter compatibility
Package-Variant Substitutes – Parts with equivalent electrical specifications but different package types (14-SSOP, 14-SOIC)

All listed substitutes maintain ROHS3 compliance and operate within the specified temperature range. Parts with active product status are prioritized for new designs.

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage (Single/Dual)	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Temp Range	Product Status
LM2901PW	Texas Instruments	14-TSSOP	2V~30V / ±1V~15V	7mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	Last Time Buy
LM2901PWR	Rohm Semiconductor	14-TSSOP	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Obsolete
BA2901SFV-E2	Rohm Semiconductor	14-LSSOP	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Active
LM239APT	STMicroelectronics	14-TSSOP	2V~32V / ±1V~16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Active
LM239PT	STMicroelectronics	14-TSSOP	2V~32V / ±1V~16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	Active
LM2901AT14-13	Diodes Incorporated	14-TSSOP	2V~36V / ±1V~18V	2mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2901DTBR2G	onsemi	14-TSSOP	3V~36V / ±1.5V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 105°C	Active
LM2901PT	STMicroelectronics	14-TSSOP	2V~32V / ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2901QS14-13	Diodes Incorporated	14-SOIC	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2901VDTBR2G	onsemi	14-TSSOP	3V~36V / ±1.5V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
LM2901YPT	STMicroelectronics	14-TSSOP	2V~32V / ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active

Engineering Selection Recommendations

For applications requiring direct pin-compatible replacement with identical package:

LM2901PT (STMicroelectronics) and LM2901YPT (STMicroelectronics) are active-status alternatives in 14-TSSOP packaging with full temperature range support (-40°C ~ 125°C). Both maintain identical quiescent current specifications (2.5mA) and support the required operating temperature range. LM2901YPT carries AEC-Q100 automotive qualification, suitable for automotive-grade applications.

For applications with extended supply voltage tolerance:

LM2901AT14-13 (Diodes Incorporated) and LM2901DTBR2G (onsemi) support expanded supply ranges (2V~36V / ±1V~18V and 3V~36V / ±1.5V~18V respectively) while maintaining 14-TSSOP packaging. Both are active-status parts with full temperature range support.

For applications permitting package variation:

LM2901QS14-13 (Diodes Incorporated) provides 14-SOIC packaging as an alternative to 14-TSSOP, maintaining identical electrical specifications and full temperature range (-40°C ~ 125°C). This part carries AEC-Q100 automotive qualification.

For applications with relaxed temperature requirements:

BA2901SFV-E2 (Rohm Semiconductor) operates to 105°C maximum and is available in 14-LSSOP packaging. This part is active-status with extended supply voltage support (2V~36V / ±1V~18V).

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, consistent with the original LM2901PW specification.

Frequently Asked Questions (FAQ)

Q: Can LM2901QS14-13 replace LM2901PW in existing PCB designs?

A: LM2901QS14-13 uses 14-SOIC packaging versus the original 14-TSSOP. While pin count and function are identical, PCB footprints differ. Physical board layout modification is required. Electrical specifications are fully compatible.

Q: What is the difference between LM2901PT and LM2901YPT?

A: Both are STMicroelectronics parts in 14-TSSOP packaging with identical electrical specifications. LM2901YPT carries AEC-Q100 automotive qualification and is suitable for automotive applications. LM2901PT is the standard industrial-grade equivalent.

Q: Why do some substitutes have lower maximum operating temperature (105°C vs 125°C)?

A: Operating temperature range is a specified parameter. Parts rated to 105°C maximum are not suitable for applications requiring full -40°C ~ 125°C operation. Verify application temperature requirements before selection.

Q: Is LM2901PWR (Rohm Semiconductor) a viable substitute despite obsolete status?

A: LM2901PWR is marked obsolete and not recommended for new designs. Active-status alternatives (LM2901PT, LM2901YPT, LM2901AT14-13) provide equivalent functionality with ongoing manufacturer support.

Q: What is the significance of the supply voltage range difference between LM2901PW (2V~30V) and LM2901DTBR2G (3V~36V)?

A: LM2901DTBR2G requires minimum 3V supply versus 2V for LM2901PW. Applications operating below 3V supply voltage cannot use LM2901DTBR2G. Verify circuit supply voltage specifications before substitution.

Q: Can I use LM239APT as a direct replacement for LM2901PW?

A: LM239APT is electrically compatible in 14-TSSOP packaging but operates to 105°C maximum versus 125°C for LM2901PW. It is suitable only for applications with maximum operating temperature of 105°C or lower. Input offset voltage is superior (2mV vs 7mV).

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with the original LM2901PW specification.

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