LM2901M/NOPB Equivalent & Substitute Parts

Part Overview

The LM2901M/NOPB is a general-purpose comparator IC manufactured by Texas Instruments, featuring four independent comparators in a 14-SOIC surface-mount package. This device operates across a wide supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) and delivers open-collector outputs suitable for logic-level interfacing. The part is currently active in production with 3,100 units in stock.

Substitute parts become necessary when the original LM2901M/NOPB reaches end-of-life status, when alternative packaging formats are required for manufacturing processes, or when enhanced specifications such as automotive-grade qualification or extended temperature ranges are needed for specific applications.

Key Parameters

Parameter	LM2901M/NOPB
Manufacturer	Texas Instruments
Package Type	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Number of Elements	4
Output Type	Open-Collector
Supply Voltage Range	2V ~ 36V (single), ±1V ~ ±18V (dual)
Input Offset Voltage (Max)	7mV @ 30V
Input Bias Current (Max)	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V
Quiescent Current (Max)	2.5mA
Operating Temperature	-40°C ~ 85°C
Product Status	Active
RoHS Compliance	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM2901M/NOPB is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Package type: 14-SOIC form factor with identical pin pitch (0.154", 3.90mm width)
Mounting type: Surface mount
Number of comparator elements: 4
Output configuration: Open-collector topology
Supply voltage range: Must encompass or exceed 2V ~ 36V (single) and ±1V ~ ±18V (dual)
Input offset voltage: Maximum 7mV specification
Input bias current: Maximum 0.25µA @ 5V
Quiescent current: Maximum 2.5mA
Operating temperature minimum: -40°C or lower
RoHS3 compliance and MSL Level 1 rating

Substitution Categories:

Category 1: Direct Functional Equivalents (Identical Specifications) Parts meeting all mandatory criteria with matching electrical performance across the full operating range.

Category 2: Enhanced Specification Upgrades (Improved Performance) Parts exceeding the LM2901M/NOPB specifications in input offset voltage, temperature range, or output current capability while maintaining full backward compatibility.

Category 3: Automotive-Grade Variants (AEC-Q100 Qualified) Parts with identical electrical specifications but carrying automotive qualification and extended temperature ratings (-40°C to 125°C).

Category 4: Alternative Manufacturer Sources (Cross-Manufacturer Equivalents) Parts from different manufacturers meeting identical electrical and package specifications.

Parameter Comparison

Part Number	Manufacturer	Packaging	Supply Voltage	Input Offset (Max)	Output Current (Typ)	Temp Range	Product Status	Grade
LM2901M/NOPB	Texas Instruments	Tube	2V~36V / ±1V~±18V	7mV @ 30V	16mA @ 5V	-40°C ~ 85°C	Active	Commercial
LM2901QDRG4Q1	Texas Instruments	Tape & Reel	2V~36V / ±1V~±18V	7mV @ 5V	20mA	-40°C ~ 125°C	Last Time Buy	Automotive (AEC-Q100)
LM2901VQDRG4Q1	Texas Instruments	Cut Tape	2V~36V / ±1V~±18V	7mV @ 5V	20mA	-40°C ~ 125°C	Last Time Buy	Automotive (AEC-Q100)
LM139AD	Texas Instruments	Tube	2V~30V / ±1V~±15V	2mV @ 30V	20mA	-55°C ~ 125°C	Last Time Buy	Commercial
LM2901AVQDR	Texas Instruments	Tape & Reel	2V~32V / ±1V~±16V	2mV @ 32V	20mA	-40°C ~ 125°C	Active	Commercial
LM2901AVQDRG4	Texas Instruments	Cut Tape & Digi-Reel	2V~32V / ±1V~±16V	2mV @ 32V	20mA	-40°C ~ 125°C	Discontinued at DiGi Electronics	Commercial
LM2901AVQDRG4Q1	Texas Instruments	Cut Tape	2V~36V / ±1V~±18V	2mV @ 5V	20mA	-40°C ~ 125°C	Last Time Buy	Automotive (AEC-Q100)
LM2901AVQDRQ1	Texas Instruments	Tape & Reel	2V~36V / ±1V~±18V	2mV @ 5V	20mA	-40°C ~ 125°C	Active	Automotive (AEC-Q100)
LM2901D	STMicroelectronics	Tube	2V~32V / ±1V~±16V	7mV @ 5V	16mA @ 5V	-40°C ~ 125°C	Active	Commercial
LM2901DR	Rohm Semiconductor	Not Specified	2V~36V / ±1V~±18V	7mV @ 5V	16nA @ 5V	-40°C ~ 125°C	Obsolete	Commercial
LM2901DRG3	Texas Instruments	Tape & Reel	2V~30V / ±1V~±15V	7mV @ 30V	20mA	-40°C ~ 125°C	Active	Commercial

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): The LM2901DRG3 from Texas Instruments provides the closest functional match to the LM2901M/NOPB, maintaining identical input offset voltage (7mV @ 30V) and quiescent current specifications. This part is currently active in production and carries ROHS3 compliance. The primary difference is packaging format (Tape & Reel versus Tube) and extended temperature range (-40°C to 125°C versus -40°C to 85°C).

For Enhanced Performance Requirements: The LM2901AVQDR and LM2901AVQDRG4Q1 offer improved input offset voltage specifications (2mV versus 7mV) and increased output current capability (20mA versus 16mA). Both parts maintain full supply voltage compatibility and are ROHS3 compliant. The LM2901AVQDRG4Q1 additionally carries AEC-Q100 automotive qualification and is available in high-volume inventory (57,195 units).

For Automotive Applications: The LM2901AVQDRQ1 is the recommended selection for automotive-grade requirements. This part carries AEC-Q100 qualification, operates across the extended temperature range (-40°C to 125°C), and maintains full electrical compatibility with the original specification. It is currently active in production with 57,295 units in stock.

For Alternative Manufacturer Sourcing: The LM2901D from STMicroelectronics provides cross-manufacturer equivalence with identical package geometry and electrical performance. This part is currently active and maintains ROHS3 compliance. The LM2901DR from Rohm Semiconductor is marked as obsolete and should not be selected for new designs.

Packaging Considerations:

Tube packaging (LM2901M/NOPB, LM139AD, LM2901D): Suitable for manual assembly and lower-volume applications
Tape & Reel (LM2901QDRG4Q1, LM2901AVQDR, LM2901AVQDRQ1): Optimized for automated pick-and-place assembly
Cut Tape (LM2901VQDRG4Q1, LM2901AVQDRG4, LM2901AVQDRG4Q1): Flexible format for mixed-volume production

Frequently Asked Questions (FAQ)

Q: Can I substitute the LM2901M/NOPB with the LM139AD?

A: The LM139AD is electrically compatible and uses the identical 14-SOIC package. However, it operates at a reduced maximum supply voltage (2V~30V single supply versus 2V~36V) and reduced dual supply range (±1V~±15V versus ±1V~±18V). Substitution is valid only if your application operates within these lower voltage limits. The LM139AD offers superior input offset voltage (2mV versus 7mV) and extended temperature range (-55°C to 125°C).

Q: What is the difference between the LM2901AVQDRG4Q1 and LM2901AVQDRQ1?

A: Both parts are electrically identical with identical specifications and automotive AEC-Q100 qualification. The primary difference is packaging format: LM2901AVQDRG4Q1 is supplied in Cut Tape format with 57,195 units in inventory, while LM2901AVQDRQ1 is supplied in Tape & Reel format with 57,295 units in inventory. Select based on your assembly equipment compatibility and supply chain requirements.

Q: Is the LM2901DR from Rohm Semiconductor a viable substitute?

A: The LM2901DR is marked as obsolete and should not be selected for new designs or long-term production. Although it maintains electrical compatibility with the original part, obsolete status indicates discontinued manufacturing and potential supply chain unavailability.

Q: What are the key electrical differences between the LM2901M/NOPB and LM2901AVQDR?

A: The LM2901AVQDR provides improved input offset voltage (2mV @ 32V versus 7mV @ 30V) and increased output current capability (20mA versus 16mA). However, it operates at a reduced maximum supply voltage (2V~32V single supply versus 2V~36V). Both parts maintain identical quiescent current specifications (2.5mA maximum) and are ROHS3 compliant. The LM2901AVQDR is currently active in production.

Q: Can I use the LM2901D from STMicroelectronics as a direct replacement?

A: Yes. The LM2901D from STMicroelectronics is a direct functional equivalent with identical 14-SOIC package geometry, four comparator elements, open-collector output configuration, and matching electrical specifications (7mV input offset voltage, 0.25µA input bias current, 16mA output current). It is currently active in production with ROHS3 compliance. The primary difference is manufacturer origin and extended temperature range (-40°C to 125°C versus -40°C to 85°C).

Q: Which substitute part offers the best performance improvement?

A: The LM2901AVQDRG4Q1 and LM2901AVQDRQ1 provide the most significant performance improvements: reduced input offset voltage (2mV versus 7mV), increased output current (20mA versus 16mA), extended temperature range (-40°C to 125°C), and automotive AEC-Q100 qualification. Both parts maintain full supply voltage compatibility (2V~36V single, ±1V~±18V dual) and are currently in active production with high inventory availability.

Q: What packaging format should I select for high-volume automated assembly?

A: For automated pick-and-place assembly, select Tape & Reel or Cut Tape formats. The LM2901AVQDRQ1 (Tape & Reel, 57,295 units) and LM2901AVQDRG4Q1 (Cut Tape, 57,195 units) are both suitable for high-volume production. Tube packaging (LM2901M/NOPB, LM139AD, LM2901D) is better suited for manual assembly or lower-volume applications.

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