LM2901DR2 Equivalent & Substitute Parts

Part Overview

The LM2901DR2 is a quad general-purpose comparator IC manufactured by onsemi in 14-SOIC surface-mount packaging. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The LM2901 series represents a foundational comparator architecture with multiple manufacturer implementations and package variants available in the active product market.

Key Parameters

Parameter	LM2901DR2 Specification
Manufacturer	onsemi
Package Type	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Number of Elements	4 Comparators
Product Status	Obsolete
RoHS Status	RoHS Non-Compliant
Moisture Sensitivity Level	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN Classification	EAR99
HTSUS Code	8542.39.0001

Substitute Part Grouping Explanation

Substitution of the LM2901DR2 is determined by the following criteria:

Primary Substitution Criteria:

Base product number: LM2901 or functionally equivalent comparator series (LM339, CMP04)
Package compatibility: 14-SOIC surface-mount form factor
Functional equivalence: Quad general-purpose comparator with open-collector or CMOS output capability
Electrical compatibility: Supply voltage range, input offset voltage, and output current ratings

Substitution Categories:

Direct substitutes maintain identical 14-SOIC packaging and LM2901 base product designation with active product status and RoHS3 compliance. These include LM2901DR2G (onsemi), LM2901DR (Rohm Semiconductor), and LM2901DRG3 (Texas Instruments).

Similar substitutes provide equivalent comparator functionality in 14-SOIC packaging but may represent alternative base product numbers (LM339D, CMP04FSZ-REEL) or different package variants (LM2901PT in 14-TSSOP, LM2901YPT in 14-TSSOP, LM2901Q4T in 16-QFN, LM139AJ/PB in 14-CDIP).

Parameter Comparison

Part Number	Manufacturer	Package	Product Status	RoHS Status	Voltage Supply (Single/Dual)	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp
LM2901DR2	onsemi	14-SOIC	Obsolete	Non-Compliant	-	-	-	-	-	-
LM2901DR2G	onsemi	14-SOIC	Active	ROHS3 Compliant	3V ~ 36V, ±1.5V ~ 18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 105°C
LM2901DR	Rohm Semiconductor	14-SOIC	Obsolete	ROHS3 Compliant	2V ~ 36V, ±1V ~ 18V	7mV @ 5V	0.25µA @ 5V	16nA @ 5V	2mA	-40°C ~ 125°C
LM2901DRG3	Texas Instruments	14-SOIC	Active	ROHS3 Compliant	2V ~ 30V, ±1V ~ 15V	7mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C
CMP04FSZ-REEL	Analog Devices Inc.	14-SOIC	Active	ROHS3 Compliant	3.3V ~ 36V, ±1.65V ~ 18V	1mV @ 5V	0.1µA @ 5V	16mA @ 5V	3mA	-40°C ~ 85°C
LM2901PT	STMicroelectronics	14-TSSOP	Active	ROHS3 Compliant	2V ~ 32V, ±1V ~ 16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C
LM2901YPT	STMicroelectronics	14-TSSOP	Active	ROHS3 Compliant	2V ~ 32V, ±1V ~ 16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C
LM2901Q4T	STMicroelectronics	16-QFN (3x3)	Active	ROHS3 Compliant	2V ~ 36V, ±1V ~ 18V	-	-	-	2.5mA	-
LM139AJ/PB	Texas Instruments	14-CDIP	Active	ROHS3 Compliant	2V ~ 36V, ±1V ~ 18V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2.5mA	-55°C ~ 125°C
LM339D	STMicroelectronics	14-SOIC	Active	ROHS3 Compliant	2V ~ 32V, ±1V ~ 16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C
LM2901N	National Semiconductor	-	Active	Vendor Undefined	-	-	-	-	-	-

Engineering Selection Recommendations

For Direct 14-SOIC Surface-Mount Replacement:

LM2901DR2G (onsemi) is the primary recommended substitute, offering identical packaging, active product status, and RoHS3 compliance. This part maintains the same manufacturer lineage as the obsolete LM2901DR2 and provides the most straightforward design continuity.

LM2901DRG3 (Texas Instruments) serves as an alternative direct substitute with active status and RoHS3 compliance. This part offers extended operating temperature range (-40°C to 125°C) compared to the onsemi variant.

For Enhanced Performance in 14-SOIC:

CMP04FSZ-REEL (Analog Devices Inc.) provides superior electrical characteristics including lower input offset voltage (1mV vs. 7mV) and lower input bias current (0.1µA vs. 0.25µA) while maintaining 14-SOIC packaging and active product status. Operating temperature range is limited to -40°C to 85°C.

For Alternative Package Formats:

LM2901PT and LM2901YPT (STMicroelectronics) offer equivalent LM2901 functionality in 14-TSSOP packaging with active status and RoHS3 compliance. The LM2901YPT variant includes automotive-grade qualification (AEC-Q100).

LM2901Q4T (STMicroelectronics) provides LM2901 functionality in compact 16-QFN (3x3) packaging for space-constrained applications.

LM139AJ/PB (Texas Instruments) offers through-hole 14-CDIP packaging for legacy board designs, with extended operating temperature range (-55°C to 125°C) and improved input offset voltage specification (2mV @ 30V).

Compliance Considerations:

All recommended active substitutes carry RoHS3 compliance certification, addressing regulatory requirements absent from the obsolete LM2901DR2. REACH status remains unaffected across all variants. Moisture sensitivity level remains 1 (Unlimited) for all recommended parts.

Frequently Asked Questions (FAQ)

Q: Can LM2901DR2G directly replace LM2901DR2 without PCB modification?

A: Yes. LM2901DR2G maintains identical 14-SOIC surface-mount packaging and pinout. No PCB layout changes are required. The primary difference is product status (active vs. obsolete) and RoHS3 compliance certification.

Q: What is the key difference between LM2901DRG3 and LM2901DR2G?

A: Both are active LM2901 variants in 14-SOIC packaging. LM2901DRG3 (Texas Instruments) specifies a narrower supply voltage range (2V ~ 30V vs. 3V ~ 36V) but offers extended operating temperature range (-40°C to 125°C vs. -40°C to 105°C).

Q: Can I use CMP04FSZ-REEL as a direct substitute?

A: CMP04FSZ-REEL maintains 14-SOIC packaging and quad comparator functionality with superior electrical specifications. However, it represents a different base product number (CMP04 vs. LM2901) and has a narrower operating temperature range (-40°C to 85°C). Functional compatibility is confirmed, but design validation is recommended.

Q: What are the advantages of LM2901PT or LM2901YPT over 14-SOIC variants?

A: Both parts use 14-TSSOP packaging, which offers smaller footprint and reduced board space compared to 14-SOIC. LM2901YPT includes automotive-grade qualification (AEC-Q100). Electrical specifications remain equivalent to other LM2901 variants.

Q: Is LM139AJ/PB suitable for new designs?

A: LM139AJ/PB is active and RoHS3 compliant but uses through-hole 14-CDIP packaging. This variant is appropriate for legacy board designs or applications requiring through-hole mounting. For new surface-mount designs, 14-SOIC or 14-TSSOP variants are preferred.

Q: How does LM2901Q4T differ from standard 14-SOIC variants?

A: LM2901Q4T uses compact 16-QFN (3x3) packaging instead of 14-SOIC. This reduces board footprint significantly. Electrical specifications are comparable, though some parameters lack detailed specification in available data. This variant is suitable for space-constrained applications.

Q: Are all recommended substitutes RoHS3 compliant?

A: All active recommended substitutes carry RoHS3 compliance certification. The obsolete LM2901DR2 is RoHS non-compliant. Compliance certification is a key differentiator for new procurement and design qualification.

Q: What operating temperature range should I select?

A: Standard LM2901 variants operate from -40°C to 125°C. LM2901DR2G is limited to -40°C to 105°C. CMP04FSZ-REEL is limited to -40°C to 85°C. LM339D operates from 0°C to 70°C. Select based on application thermal requirements.

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