LM2901VQDR Equivalent & Substitute Parts

Part Overview

The LM2901VQDR is a general-purpose comparator IC manufactured by Texas Instruments, featuring four independent differential comparators with open-collector outputs. This device operates across a wide supply voltage range (2V to 32V single supply, ±1V to ±16V dual supply) and is housed in a 14-SOIC surface-mount package. The LM2901VQDR is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing flexibility, or when design specifications allow for compatible alternatives with enhanced performance characteristics or different thermal operating ranges.

Key Parameters

Parameter	LM2901VQDR
Manufacturer	Texas Instruments
Number of Elements	4
Output Type	Open-Collector
Voltage Supply Range (Single/Dual)	2V ~ 32V / ±1V ~ 16V
Voltage - Input Offset (Max)	7mV @ 32V
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-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LM2901VQDR are classified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Number of Elements: 4 differential comparators
Output Type: Open-Collector or compatible output configuration
Package Type: 14-SOIC or equivalent 14-pin surface-mount package
Supply Voltage Range: Minimum overlap with 2V ~ 32V (single) and ±1V ~ 16V (dual)
Input Offset Voltage: Maximum 7mV or better
Input Bias Current: 0.25µA or lower
Output Current: 16mA or higher
Operating Temperature: Minimum -40°C to +125°C coverage

Substitutes are grouped into three categories:

Direct Equivalents (Same Base Product): Parts sharing the LM2901 base designation with identical electrical specifications but different packaging formats (Tube vs. Tape & Reel).
Functional Equivalents (LM339 Series): Parts with the LM339 base designation offering identical or superior electrical performance, wider supply voltage ranges (up to ±18V), and extended temperature coverage. These are pin-compatible and functionally interchangeable.
Cross-Manufacturer Alternatives: Parts from Rohm Semiconductor (BA2901 and BA10339 series) and STMicroelectronics (LM2901D) offering equivalent performance with different package widths or thermal specifications.

Parameter Comparison

Part Number	Manufacturer	Output Type	Supply Voltage (Single/Dual)	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Package	Product Status
LM2901VQDR	Texas Instruments	Open-Collector	2V~32V / ±1V~16V	7mV @ 32V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	14-SOIC (3.90mm)	Active
LM2901D	STMicroelectronics	Open-Collector, CMOS, DTL, ECL, MOS, TTL	2V~32V / ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-SO	Active
LM139AD	Texas Instruments	Open-Collector, Open-Drain	2V~30V / ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	14-SOIC (3.90mm)	Last Time Buy
LM339AM/NOPB	National Semiconductor	Open-Collector	2V~36V / ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-SOIC (3.90mm)	Active
LM339AMX/NOPB	Texas Instruments	Open-Collector	2V~36V / ±1V~18V	2mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-SOIC (3.90mm)	Active
LM339M/NOPB	Texas Instruments	Open-Collector	2V~36V / ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	14-SOIC (3.90mm)	Active
LP339M/NOPB	Texas Instruments	CMOS, MOS, Open-Collector	2V~36V / ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	14-SOIC (3.90mm)	Active
LP339MX/NOPB	Texas Instruments	CMOS, MOS, Open-Collector	2V~36V / ±1V~18V	5mV @ 5V	0.025µA @ 5V	10mA @ 5V	100µA	0°C ~ 70°C	14-SOIC (3.90mm)	Active
BA10339F-E2	Rohm Semiconductor	Open-Collector	3V~36V / ±1.5V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	14-SOP (4.40mm)	Active
BA2901F-E2	Rohm Semiconductor	Open-Collector	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 125°C	14-SOP (4.40mm)	Active
BA2901SF-E2	Rohm Semiconductor	Open-Collector	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-SOP (4.40mm)	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): LM2901D (STMicroelectronics) is a direct functional equivalent with matching electrical performance and identical operating temperature range (-40°C to 125°C). This part is suitable for applications requiring the same performance envelope as the LM2901VQDR.

For Extended Supply Voltage Range: LM339AMX/NOPB and LM339AM/NOPB (Texas Instruments) extend the supply voltage range to ±18V dual supply and 36V single supply, providing greater design flexibility. However, these parts are rated for 0°C to 70°C operating temperature, which is narrower than the LM2901VQDR. These are appropriate for applications operating within the commercial temperature range.

For Low-Power Applications: LP339M/NOPB and LP339MX/NOPB (Texas Instruments) feature significantly reduced quiescent current (100µA vs. 2.5mA) and input bias current (0.025µA vs. 0.25µA), making them suitable for battery-powered or low-power designs. These parts maintain the same 14-SOIC package footprint and are ROHS3 compliant.

For Cross-Manufacturer Sourcing: BA2901F-E2 and BA2901SF-E2 (Rohm Semiconductor) provide equivalent performance with full temperature range coverage (-40°C to 125°C and -40°C to 105°C respectively). These parts use a 14-SOP package with 4.40mm width, which differs from the standard 3.90mm SOIC width. PCB layout verification is required before substitution.

For Extended Temperature Range: LM139AD (Texas Instruments) offers the widest operating temperature range (-55°C to 125°C) with superior input offset voltage (2mV) and lower input bias current (0.1µA). This part is classified as Last Time Buy, indicating limited future availability.

All substitute parts listed maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can I use LM339 series parts as direct replacements for LM2901VQDR?

A: Yes, LM339 series parts (LM339AM/NOPB, LM339AMX/NOPB, LM339M/NOPB) are pin-compatible and functionally equivalent. All feature four independent comparators in 14-SOIC packages with open-collector outputs. However, verify that your application operates within the 0°C to 70°C temperature range, as these parts have a narrower operating temperature specification than the LM2901VQDR.

Q: What is the difference between LM339 and LP339 series?

A: The LP339 series (LP339M/NOPB, LP339MX/NOPB) features CMOS/MOS output stages with significantly lower quiescent current (100µA vs. 2.5mA) and input bias current (0.025µA vs. 0.25µA). The LP339 is optimized for low-power applications. Both series maintain identical pin configurations and 14-SOIC packaging.

Q: Are Rohm BA2901 and BA10339 parts compatible with LM2901VQDR?

A: BA2901F-E2 and BA2901SF-E2 are functionally equivalent with matching electrical specifications and full temperature range coverage. However, these parts use a 14-SOP package with 4.40mm width compared to the standard 14-SOIC 3.90mm width of the LM2901VQDR. PCB footprint verification is required before substitution. BA10339F-E2 has a minimum supply voltage of 3V (vs. 2V for LM2901VQDR) and is rated to 85°C maximum, making it less suitable for extended temperature applications.

Q: What does "Last Time Buy" status mean for LM139AD?

A: Last Time Buy indicates that the manufacturer has announced end-of-life for this part. While currently available, future availability is limited. LM139AD should be considered only if extended temperature range (-55°C to 125°C) is a critical requirement and alternative parts do not meet specifications.

Q: Can I substitute LM2901D (STMicroelectronics) for LM2901VQDR?

A: Yes, LM2901D is a direct equivalent with identical electrical performance and operating temperature range. The primary difference is packaging format (Tube vs. Tape & Reel). Verify that your procurement and assembly processes support the alternative packaging format.

Q: What are the key parameters I should verify when selecting a substitute?

A: Verify the following parameters match or exceed your application requirements: (1) Supply voltage range compatibility, (2) Operating temperature range, (3) Input offset voltage and input bias current specifications, (4) Output current capability, (5) Package footprint and mounting type, (6) Quiescent current for power-sensitive applications. All listed substitutes maintain 14-pin comparator configuration with open-collector outputs and ROHS3 compliance.

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