LM2901QS14-13 Equivalent & Substitute Parts

Part Overview

The LM2901QS14-13 is a general-purpose quad comparator IC manufactured by Diodes Incorporated in 14-SOIC surface mount packaging. This device features CMOS and TTL output types with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual), making it suitable for a wide range of analog comparison applications. The part is actively produced, AEC-Q100 qualified for automotive applications, and fully RoHS3 compliant. Substitute parts are necessary when addressing packaging constraints, supply chain availability, temperature range requirements, or output type compatibility in specific circuit designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2901QS14-13
Manufacturer	Diodes Incorporated
Number of Elements	4
Output Type	CMOS, TTL
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	7mV @ 5V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	16mA @ 5V
Current - Quiescent (Max)	2.5mA
Operating Temperature	-40°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Grade	Automotive
Qualification	AEC-Q100
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LM2901QS14-13 is determined by the following critical parameters:

Functional Equivalence: All substitute parts must contain four independent comparator elements with general-purpose operation capability.

Electrical Compatibility: Supply voltage range must encompass or match the original specification (2V ~ 36V single, ±1V ~ 18V dual). Output type compatibility depends on circuit requirements; CMOS/TTL outputs are directly compatible, while Open-Collector outputs require pull-up resistor configuration.

Thermal Range: Operating temperature range must support the application environment. The original part operates from -40°C to 125°C; substitutes with narrower ranges (0°C ~ 70°C or -25°C ~ 85°C) are suitable only for non-automotive or limited-temperature applications.

Package Compatibility: Surface mount packages (14-SOIC, 14-TSSOP, 14-SSOP) are interchangeable on PCBs designed for surface mount assembly. Through-hole packages (14-CDIP) require different PCB footprints and assembly methods.

Automotive Qualification: AEC-Q100 certification is required for automotive applications. The original part carries this qualification; substitutes without AEC-Q100 are unsuitable for automotive use.

Compliance: All listed substitutes maintain ROHS3 compliance and EAR99 export classification matching the original part.

Parameter Comparison

Part Number	Manufacturer	Output Type	Supply Voltage	Input Offset (Max)	Output Current (Typ)	Quiescent Current (Max)	Temp Range	Package	AEC-Q100	Status
LM2901QS14-13	Diodes Inc.	CMOS, TTL	2V~36V, ±1V~18V	7mV @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-SOIC	Yes	Active
LM139DR	Texas Instruments	Open-Collector, Open-Drain	2V~30V, ±1V~15V	5mV @ 30V	20mA	2mA	-55°C ~ 125°C	14-SOIC	No	Active
LM139J/PB	Texas Instruments	Open-Collector, Open-Drain	2V~36V, ±1V~18V	5mV @ 30V	16mA @ 5V	2.5mA	-55°C ~ 125°C	14-CDIP	No	Active
LM239AMPWREP	Texas Instruments	Open-Collector	2V~36V, ±1V~18V	2.5mV @ 30V	20mA	2mA	-55°C ~ 125°C	14-TSSOP	No	Active
LM239PW	Texas Instruments	Open-Collector	2V~30V, ±1V~15V	5mV @ 30V	20mA	2mA	-25°C ~ 85°C	14-TSSOP	No	Last Time Buy
LM2901AVQPWRQ1	Texas Instruments	Open-Collector	2V~36V, ±1V~18V	2mV @ 5V	20mA	2.5mA	-40°C ~ 125°C	14-TSSOP	Yes	Active
LM2901QPWRG4Q1	Texas Instruments	Open-Collector	2V~36V, ±1V~18V	7mV @ 5V	20mA	2.5mA	-40°C ~ 125°C	14-TSSOP	Yes	Active
LM2901VQDR	Rohm Semiconductor	CMOS, MOS, Open-Collector, TTL	2V~36V, ±1V~18V	7mV @ 5V	16nA @ 5V	2mA	-40°C ~ 125°C	14-SOIC	No	Obsolete
LM339D	STMicroelectronics	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V, ±1V~16V	5mV @ 30V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-SOIC	No	Active
LM339DBR	Texas Instruments	Open-Collector	2V~30V, ±1V~15V	5mV @ 30V	20mA	2.5mA	0°C ~ 70°C	14-SSOP	No	Active
LM339PW	Texas Instruments	Open-Collector	2V~30V, ±1V~15V	5mV @ 30V	20mA	2.5mA	0°C ~ 70°C	14-TSSOP	No	Last Time Buy

Engineering Selection Recommendations

For Automotive Applications with Full Temperature Range: LM2901AVQPWRQ1 and LM2901QPWRG4Q1 are the primary substitutes. Both maintain AEC-Q100 qualification, operate across -40°C to 125°C, and support the full 2V to 36V supply range. LM2901AVQPWRQ1 offers superior input offset performance (2mV @ 5V). Both are packaged in 14-TSSOP surface mount format. These parts are actively produced with substantial inventory availability.

For Surface Mount Applications with Standard Temperature Range: LM139DR (14-SOIC) and LM339DBR (14-SSOP) provide direct package compatibility with the original part. Both are actively produced. LM139DR maintains the 14-SOIC footprint identical to the original. Supply voltage is limited to 2V~30V (±1V~15V), and operating temperature is restricted to 0°C~70°C, making these suitable for commercial-grade applications only.

For Through-Hole Assembly: LM139J/PB in 14-CDIP packaging is the only through-hole option. It supports the full 2V~36V supply range and -55°C to 125°C operating temperature. This part is actively produced but requires different PCB footprint design compared to surface mount alternatives.

For Compact Surface Mount with Improved Offset Performance: LM239AMPWREP in 14-TSSOP packaging offers the lowest input offset specification (2.5mV @ 30V) and maintains full supply voltage range (2V~36V, ±1V~18V) with extended temperature range (-55°C to 125°C). This part is actively produced with limited inventory.

Parts to Avoid: LM2901VQDR (Rohm) is obsolete and should not be selected for new designs. LM239PW and LM339PW are marked Last Time Buy, indicating discontinued production; these are suitable only for legacy system maintenance. LM339D has a restricted operating temperature range (0°C~70°C) and reduced supply voltage ceiling (2V~32V, ±1V~16V).

Frequently Asked Questions (FAQ)

Q: Can I substitute the LM2901QS14-13 with an Open-Collector output part in my existing circuit?

A: Open-Collector output types (LM139DR, LM239AMPWREP, LM2901AVQPWRQ1, LM2901QPWRG4Q1) require external pull-up resistors to generate logic-level outputs. If your circuit is designed for CMOS/TTL push-pull outputs, you must add pull-up resistors to the output pins. Verify your PCB layout and schematic support this modification before substitution.

Q: What is the difference between 14-SOIC, 14-TSSOP, and 14-SSOP packages?

A: 14-SOIC (0.154" width, 3.90mm) is the original package. 14-TSSOP (0.173" width, 4.40mm) and 14-SSOP (0.209" width, 5.30mm) are smaller surface mount alternatives with different pin spacing and footprint dimensions. These packages are not interchangeable on the same PCB; your board must be designed for the specific package type.

Q: Is the LM2901AVQPWRQ1 a direct replacement for automotive applications?

A: LM2901AVQPWRQ1 maintains AEC-Q100 qualification, operates across -40°C to 125°C, and supports 2V~36V supply voltage matching the original part. The primary difference is the output type (Open-Collector vs. CMOS/TTL) and package format (14-TSSOP vs. 14-SOIC). If your circuit accommodates Open-Collector outputs and 14-TSSOP footprint, this is a qualified automotive substitute.

Q: Why do some substitutes have lower supply voltage limits?

A: LM139DR, LM239PW, and LM339PW are limited to 2V~30V (±1V~15V) due to their internal design specifications. The original LM2901QS14-13 supports 2V~36V. If your application requires operation above 30V, these parts are unsuitable. Select alternatives with matching or higher voltage ratings.

Q: Can I use LM339D as a substitute?

A: LM339D is not recommended as a primary substitute. It has a restricted operating temperature range (0°C~70°C) unsuitable for automotive or extended-temperature applications, and a reduced supply voltage ceiling (2V~32V, ±1V~16V). Use this part only if your application operates within these narrower specifications.

Q: What does "Last Time Buy" status mean?

A: Parts marked Last Time Buy (LM239PW, LM339PW) are discontinued and no longer manufactured. Existing inventory may be available from distributors, but supply is finite and will eventually deplete. These parts should be used only for legacy system repairs or maintenance, not for new designs.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitute parts maintain ROHS3 compliance matching the original LM2901QS14-13. All parts are also classified as EAR99 for export purposes.

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