LM2901DT Equivalent & Substitute Parts

Part Overview

The LM2901DT is a general-purpose comparator IC manufactured by Rohm Semiconductor, featuring four independent comparators in a 14-SOIC surface-mount package. The device supports dual supply operation (±1V to ±18V) and single supply operation (2V to 36V), with CMOS, MOS, open-collector, and TTL output types. The LM2901DT is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. Substitute parts must maintain functional equivalence across core electrical parameters including supply voltage range, input offset voltage, input bias current, output current capability, and quiescent current consumption.

Key Parameters

Parameter	LM2901DT Value	Unit
Number of Elements	4	—
Output Type	CMOS, MOS, Open-Collector, TTL	—
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V	V
Voltage - Input Offset (Max)	7mV @ 5V	mV
Current - Input Bias (Max)	0.25µA @ 5V	µA
Current - Output (Typ)	16nA @ 5V	nA
Current - Quiescent (Max)	2mA	mA
Operating Temperature	-40°C ~ 125°C	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LM2901DT are grouped based on the following substitution criteria:

Direct Substitutes (Same Package, Electrical Compatibility): Parts that maintain the 14-SOIC package format with supply voltage range of 2V ~ 36V (single) and ±1V ~ 18V (dual), quiescent current at or below 2.5mA, and open-collector output capability. These parts are electrically interchangeable with minimal or no circuit modifications.

Similar Substitutes (Alternative Packages, Functional Equivalence): Parts that provide the same four-comparator functionality and core electrical parameters but in different package formats (14-TSSOP, 14-DIP) or with modified output types (open-collector, open-drain). These require PCB layout or socket adapter considerations but maintain functional equivalence.

Key Parameters for Substitution:

Four independent comparators per IC
Supply voltage range compatibility (minimum 2V ~ 36V single or ±1V ~ 18V dual)
Quiescent current ≤ 2.5mA
Input offset voltage ≤ 7mV @ 5V
Input bias current ≤ 0.25µA @ 5V
Output current capability ≥ 10mA
Operating temperature range overlap with -40°C ~ 125°C
RoHS3 compliance and REACH unaffected status

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage (Single/Dual)	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range	Product Status
LM2901DT	Rohm Semiconductor	14-SOIC	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16nA @ 5V	2mA	-40°C ~ 125°C	Obsolete
LM2901HYDT	STMicroelectronics	14-SOIC	2V~36V, ±1V~18V	—	—	—	2.5mA	—	Active
AS339GTR-G1	Diodes Incorporated	14-TSSOP	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	Active
NJM12901D1	Nisshinbo Micro Devices Inc.	14-DIP	2V~14V, ±1V~7V	4mV @ 5V	0.2µA @ 5V	10mA @ 5V	—	-40°C ~ 85°C	Active
AS339AMTR-E1	Diodes Incorporated	14-SOIC	2V~36V, ±1V~18V	3mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	Active
AS339MTR-E1	Diodes Incorporated	14-SOIC	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	Active
AS339MTR-G1	Diodes Incorporated	14-SOIC	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA	2mA	-40°C ~ 85°C	Active
LM139AD	Texas Instruments	14-SOIC	2V~30V, ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	Last Time Buy
LM139ADG4	Texas Instruments	14-SOIC	2V~30V, ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	Obsolete
LM139ADR	Texas Instruments	14-SOIC	2V~30V, ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	Active
LM139ADRG4	Texas Instruments	14-SOIC	2V~30V, ±1V~15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Primary Recommendation - Direct Substitutes (14-SOIC Package):

For applications requiring pin-for-pin compatibility and identical PCB footprint, select from active-status parts in 14-SOIC format:

AS339AMTR-E1 (Diodes Incorporated): Maintains 2V~36V / ±1V~18V supply range, MSL 1 rating, ROHS3 compliant, active product status with high inventory availability (50,100 pcs).
AS339MTR-E1 or AS339MTR-G1 (Diodes Incorporated): Alternative 14-SOIC options with identical electrical specifications, active status, and substantial inventory.
LM2901HYDT (STMicroelectronics): Direct 14-SOIC substitute with automotive-grade qualification (AEC-Q100), active status, suitable for automotive applications.

Secondary Recommendation - Alternative Packages:

For applications where package format flexibility exists:

LM139ADR (Texas Instruments): 14-SOIC format, active status, extended temperature range (-55°C ~ 125°C), superior input offset voltage (2mV @ 30V), higher output current (20mA), and ROHS3 compliance. Suitable for high-precision applications.
AS339GTR-G1 (Diodes Incorporated): 14-TSSOP package alternative, active status, full supply voltage compatibility, reduced footprint option for space-constrained designs.
NJM12901D1 (Nisshinbo Micro Devices Inc.): 14-DIP through-hole package, active status, suitable for legacy or prototype applications where surface-mount is not required. Note: Supply voltage range limited to 2V~14V / ±1V~7V.

Compliance and Certification Considerations:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original LM2901DT environmental requirements. The LM2901HYDT includes AEC-Q100 automotive qualification for applications requiring automotive-grade components. MSL ratings vary; AS339AMTR-E1 offers MSL 1 (unlimited moisture sensitivity), while other Diodes parts specify MSL 3 (168 hours).

Frequently Asked Questions (FAQ)

Q: Can I use AS339AMTR-E1 as a direct replacement for LM2901DT without circuit modifications?

A: Yes. Both parts feature identical 14-SOIC packaging, matching supply voltage ranges (2V~36V single, ±1V~18V dual), equivalent quiescent current (2mA), and compatible input/output electrical characteristics. No circuit modifications are required for pin-for-pin substitution.

Q: What is the key difference between AS339MTR-E1 and AS339AMTR-E1?

A: Both are 14-SOIC Diodes Incorporated comparators with identical electrical specifications and supply ranges. The primary difference is packaging format: AS339MTR-E1 uses Cut Tape & Digi-Reel with MSL 3, while AS339AMTR-E1 uses Tape & Reel with MSL 1 (unlimited moisture sensitivity). Select based on moisture handling requirements and packaging preference.

Q: Why is NJM12901D1 listed as a substitute if its supply voltage range is limited to 2V~14V?

A: NJM12901D1 is functionally equivalent for applications operating within its 2V~14V supply range. It provides four independent comparators in an active-status through-hole package, making it suitable for legacy designs or prototypes. Applications requiring the full 2V~36V range must select alternative substitutes.

Q: Is LM139ADR suitable for replacing LM2901DT in precision applications?

A: LM139ADR is suitable if your application can accommodate a reduced supply voltage range (2V~30V single, ±1V~15V dual). It offers superior input offset voltage (2mV @ 30V vs. 7mV @ 5V), higher output current (20mA), extended temperature range (-55°C ~ 125°C), and active product status. Verify supply voltage compatibility before selection.

Q: What packaging options are available for LM2901DT substitutes?

A: Substitutes are available in three package formats: 14-SOIC (surface-mount, 0.154" width) for direct replacement; 14-TSSOP (surface-mount, 0.173" width) for compact designs; and 14-DIP (through-hole, 0.300" width) for legacy or prototype applications. Select based on PCB assembly capability and design requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the environmental requirements of the original LM2901DT.

Q: Which substitute offers the best inventory availability?

A: AS339AMTR-E1 (Diodes Incorporated) provides the highest inventory availability at 50,100 pcs, followed by AS339MTR-E1 (44,546 pcs) and AS339GTR-G1 (53,080 pcs). LM2901HYDT (STMicroelectronics) offers 4,310 pcs for automotive-qualified applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message