LM2901VDR2G Equivalent & Substitute Parts

Part Overview

The LM2901VDR2G is a general-purpose quad comparator integrated circuit manufactured by onsemi, housed in a 14-SOIC surface-mount package. This device features CMOS, open-collector, and TTL output configurations, supporting a wide supply voltage range of 3V to 36V (single supply) or ±1.5V to ±18V (dual supply). The LM2901VDR2G is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching functional specifications, electrical parameters, package compatibility, and operational characteristics to ensure direct or near-direct replacement capability in circuit applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2901VDR2G
Manufacturer	onsemi
Category	Linear
Type	General Purpose Comparator
Number of Elements	4
Output Type	CMOS, Open-Collector, TTL
Voltage - Supply, Single/Dual (±)	3V ~ 36V, ±1.5V ~ 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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the LM2901VDR2G are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalent: Parts that match all critical electrical specifications and package dimensions, enabling direct replacement without circuit modification.

Similar Parts: Components that share the same functional purpose (quad general-purpose comparator), output type (open-collector), and package form factor (14-SOIC or compatible), but may exhibit variations in specific electrical parameters such as input offset voltage, quiescent current, or operating temperature range. These parts are suitable for applications where the parameter variations fall within acceptable design tolerances.

Key substitution criteria:

Number of elements: 4 comparators
Output type: Open-Collector (primary compatibility requirement)
Package type: 14-SOIC or equivalent surface-mount 14-pin packages
Supply voltage range: Minimum 2V to 36V single supply or ±1V to ±18V dual supply
Current output capability: 16mA typical @ 5V
Input bias current: ≤0.25µA @ 5V
Operating temperature: -40°C minimum to 85°C or higher maximum

Parameter Comparison

Parameter	LM2901VDR2G	NCV2901DR2G	AS339AMTR-E1	AS339MTR-E1	AS339MTR-G1	BA2901SF-E2	BA2901YF-MGE2	LM139ADT	LM139J/PB	LM239DT	LM239QT
Manufacturer	onsemi	onsemi	Diodes Inc.	Diodes Inc.	Diodes Inc.	Rohm Semi.	Rohm Semi.	STMicro	Texas Inst.	STMicro	STMicro
Number of Elements	4	4	4	4	4	4	4	4	4	4	4
Output Type	CMOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Not specified	Open-Collector, Open-Drain	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL
Voltage - Supply, Single/Dual (±)	3V ~ 36V, ±1.5V ~ 18V	3V ~ 36V, ±1.5V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 32V, ±1V ~ 16V	2V ~ 36V, ±1V ~ 18V	2V ~ 32V, ±1V ~ 16V	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	7mV @ 5V	7mV @ 5V	3mV @ 5V	5mV @ 5V	5mV @ 5V	7mV @ 5V	7mV @ 5V	2mV @ 30V	5mV @ 30V	5mV @ 30V	5mV
Current - Input Bias (Max)	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.05µA @ 5V	0.1µA @ 5V	0.1µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Current - Output (Typ)	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V
Current - Quiescent (Max)	2.5mA	2.5mA	2mA	2mA	2mA	2mA	1mA	2mA	2.5mA	2mA	2mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.154", 3.90mm)	14-CDIP (0.300", 7.62mm)	14-SOIC (0.154", 3.90mm)	16-VFQFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Through Hole	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Parametric Equivalent:

NCV2901DR2G (onsemi) is the primary parametric equivalent, matching all electrical specifications and package dimensions of the LM2901VDR2G. This part includes AEC-Q100 automotive qualification, making it suitable for applications requiring automotive-grade reliability. Selection of NCV2901DR2G is appropriate when automotive compliance or enhanced qualification is required.

Compatible Substitutes for Standard Applications:

AS339AMTR-E1, AS339MTR-E1, and AS339MTR-G1 (Diodes Incorporated) are functionally compatible quad comparators with open-collector output. These parts operate within the required supply voltage range and maintain equivalent output current capability. The AS339 series exhibits lower input offset voltage (3mV to 5mV) compared to the LM2901VDR2G (7mV), representing improved precision. Operating temperature range is limited to -40°C to 85°C, which is acceptable for standard industrial applications but does not extend to the full 125°C maximum of the original part.

Alternative Manufacturers:

BA2901SF-E2 and BA2901YF-MGE2 (Rohm Semiconductor) provide quad comparator functionality in 14-SOP packages with compatible electrical specifications. BA2901YF-MGE2 includes AEC-Q100 automotive qualification and extends operating temperature to 125°C, matching the original part's thermal range. Quiescent current is reduced to 1mA maximum, offering improved power efficiency.

LM139ADT (STMicroelectronics) and LM139J/PB (Texas Instruments) are established quad comparator designs with extended operating temperature ranges (-55°C to 125°C). LM139J/PB is available in through-hole 14-CDIP packaging for legacy or breadboard applications. Both parts maintain compatibility with the LM2901VDR2G electrical specifications.

LM239DT and LM239QT (STMicroelectronics) are quad comparators with extended output type support (CMOS, DTL, ECL, MOS, open-collector, TTL). LM239DT maintains the standard 14-SOIC package, while LM239QT uses a 16-VFQFN package. Both support the full 2V to 36V supply range and maintain 16mA output current capability.

Selection Criteria:

For direct replacement without design modification: NCV2901DR2G
For automotive applications: NCV2901DR2G or BA2901YF-MGE2
For improved input offset voltage performance: AS339 series
For extended temperature range: LM139ADT, LM139J/PB, or BA2901YF-MGE2
For legacy through-hole designs: LM139J/PB
For compact QFN packaging: LM239QT

All listed substitutes maintain ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can NCV2901DR2G replace LM2901VDR2G in all applications?

A: Yes. NCV2901DR2G is a parametric equivalent with identical electrical specifications, supply voltage range, output current capability, and package dimensions. The primary difference is AEC-Q100 automotive qualification, which adds reliability assurance for automotive environments.

Q: What is the key difference between the LM2901VDR2G and AS339 series?

A: The AS339 series exhibits lower input offset voltage (3mV to 5mV versus 7mV) and reduced quiescent current (2mA versus 2.5mA), providing improved precision and lower power consumption. Operating temperature range is limited to -40°C to 85°C, which is acceptable for most industrial applications but does not extend to 125°C.

Q: Are the Rohm BA2901 parts compatible with the LM2901VDR2G?

A: BA2901SF-E2 and BA2901YF-MGE2 are functionally compatible quad comparators with open-collector output and matching electrical specifications. Package dimensions differ slightly (0.173" width versus 0.154"), but both are standard 14-pin surface-mount packages suitable for PCB replacement. BA2901YF-MGE2 includes automotive qualification and extends operating temperature to 125°C.

Q: What is the difference between 14-SOIC and 14-SOP packages?

A: 14-SOIC (Small Outline Integrated Circuit) and 14-SOP (Small Outline Package) are functionally equivalent surface-mount packages with different body widths. Standard 14-SOIC measures 0.154" (3.90mm) width, while some 14-SOP variants measure 0.173" (4.40mm) width. Both are compatible with standard PCB footprints designed for 14-pin surface-mount devices, though footprint verification is recommended for tight PCB layouts.

Q: Can LM239QT (16-QFN) replace LM2901VDR2G (14-SOIC)?

A: LM239QT is functionally compatible but requires PCB redesign due to different package form factor (16-pin QFN versus 14-pin SOIC). The 16-QFN package is more compact and suitable for space-constrained applications. Electrical specifications are compatible, but layout and routing modifications are necessary.

Q: Which substitute offers the lowest quiescent current?

A: BA2901YF-MGE2 (Rohm Semiconductor) offers the lowest quiescent current at 1mA maximum, compared to 2mA to 2.5mA for other alternatives. This makes it suitable for battery-powered or low-power applications.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and active product status, meeting environmental and regulatory requirements equivalent to the LM2901VDR2G.

Q: What is the operating temperature range limitation for AS339 series?

A: AS339AMTR-E1, AS339MTR-E1, and AS339MTR-G1 operate from -40°C to 85°C, which is 40°C lower than the LM2901VDR2G maximum of 125°C. These parts are suitable for standard industrial applications but not for high-temperature environments exceeding 85°C.

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