LM2901EDR2G Equivalent & Substitute Parts

Part Overview

The LM2901EDR2G is a general-purpose comparator IC manufactured by onsemi, featuring four independent comparator elements in a 14-SOIC surface-mount package. This device operates across a wide supply voltage range of 3V to 36V (single supply) or ±1.5V to ±18V (dual supply), with a maximum input offset voltage of 7mV at 5V and typical output current of 16mA. The part is currently active in production and RoHS3 compliant.

Equivalent and substitute parts are necessary when the primary part is unavailable, when alternative packaging or mounting technologies are required for specific applications, or when design modifications necessitate different electrical characteristics or package configurations.

Key Parameters

Parameter	Value
Number of Elements	4
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)	2mA
Operating Temperature	-40°C ~ 105°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LM2901EDR2G is determined by the following critical parameters:

Number of Elements: Must be 4 independent comparators
Supply Voltage Range: Must accommodate the application's required voltage rails; narrower ranges may limit use cases
Input Offset Voltage: Lower values indicate better precision; higher values may affect circuit accuracy
Input Bias Current: Lower values reduce loading effects on signal sources
Output Current Capability: Must meet or exceed 16mA typical requirement
Quiescent Current: Lower values reduce power consumption
Operating Temperature Range: Must cover the intended application environment
Package and Mounting Type: Determines PCB integration method; surface-mount and through-hole packages are not interchangeable without redesign

Substitute parts are grouped into two categories: pin-compatible surface-mount alternatives (14-SOIC package) and functionally equivalent alternatives with different packages or electrical characteristics that require design consideration.

Parameter Comparison

Parameter	LM2901EDR2G (onsemi)	CMP04FSZ-REEL (ADI)	LM239DT (STMicroelectronics)	LM2901N/NOPB (TI)	MAX516ACWG+T (ADI/Maxim)
Number of Elements	4	4	4	4	4
Voltage - Supply, Single/Dual (±)	3V ~ 36V, ±1.5V ~ 18V	3.3V ~ 36V, ±1.65V ~ 18V	2V ~ 32V, ±1V ~ 16V	2V ~ 36V, ±1V ~ 18V	4.75V ~ 16.5V
Voltage - Input Offset (Max)	7mV @ 5V	1mV @ 5V	5mV @ 30V	7mV @ 30V	—
Current - Input Bias (Max)	0.25µA @ 5V	0.1µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.3µA @ 16.5V
Current - Output (Typ)	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	—
Current - Quiescent (Max)	2mA	3mA	2mA	2.5mA	10mA
Operating Temperature	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C	0°C ~ 70°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-DIP	24-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Through Hole	Surface Mount
Product Status	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (14-SOIC Surface Mount)

CMP04FSZ-REEL and LM239DT are the primary direct substitutes for the LM2901EDR2G. Both maintain the 14-SOIC package and surface-mount configuration, enabling board-level replacement without layout modifications. CMP04FSZ-REEL offers superior input offset voltage performance (1mV versus 7mV) and lower input bias current (0.1µA versus 0.25µA), though it operates to a maximum temperature of 85°C compared to the LM2901EDR2G's 105°C. LM239DT provides identical operating temperature range (-40°C to 105°C) and maintains the same input bias current specification, with a slightly lower input offset voltage (5mV at 30V). Both alternatives are currently in active production status with ROHS3 compliance.

Alternative Package Configurations

LM2901N/NOPB is a through-hole 14-DIP package variant of the LM2901 base product, suitable for applications requiring through-hole mounting technology. This part maintains the same supply voltage range as the original and identical quiescent current specification, but operates to a maximum temperature of 85°C. Design integration requires PCB layout modification to accommodate the 0.300" (7.62mm) DIP footprint.

MAX516ACWG+T is a 24-SOIC surface-mount package with restricted supply voltage range (4.75V to 16.5V single supply only), making it unsuitable for applications requiring the full 3V to 36V range of the LM2901EDR2G. This part exhibits significantly higher quiescent current (10mA maximum) and operates only to 70°C maximum temperature. Selection of this part is appropriate only when supply voltage constraints align with the narrower operating range and higher power consumption is acceptable.

Frequently Asked Questions (FAQ)

Q: Can CMP04FSZ-REEL be used as a direct replacement for LM2901EDR2G in all applications?

A: CMP04FSZ-REEL is pin-compatible and functionally equivalent for most applications. However, the maximum operating temperature is 85°C versus 105°C for the LM2901EDR2G. Applications requiring operation above 85°C must use LM239DT or the original part. CMP04FSZ-REEL offers improved input offset voltage (1mV) and input bias current (0.1µA), which may provide performance benefits in precision analog circuits.

Q: What is the key difference between LM239DT and CMP04FSZ-REEL?

A: Both are 14-SOIC surface-mount packages with four comparators. LM239DT maintains the full -40°C to 105°C operating temperature range of the LM2901EDR2G, while CMP04FSZ-REEL is limited to -40°C to 85°C. Input offset voltage specifications differ: LM239DT specifies 5mV at 30V, while CMP04FSZ-REEL specifies 1mV at 5V. Selection depends on temperature requirements and precision specifications of the target application.

Q: Why is LM2901N/NOPB listed as a substitute if it uses a different package?

A: LM2901N/NOPB is functionally equivalent to the LM2901EDR2G, sharing the same base product number and electrical characteristics. It is included as a substitute option for applications where through-hole mounting is preferred or required. PCB redesign is necessary to accommodate the 14-DIP footprint, but the electrical performance and supply voltage range remain compatible.

Q: Is MAX516ACWG+T suitable for replacing LM2901EDR2G in existing designs?

A: MAX516ACWG+T is not recommended as a direct substitute due to significant differences. The supply voltage range is restricted to 4.75V to 16.5V, excluding applications requiring 3V operation or dual supplies below ±1.65V. Quiescent current is substantially higher (10mA maximum versus 2mA), and maximum operating temperature is limited to 70°C. This part is appropriate only for new designs with compatible voltage and temperature specifications.

Q: What packaging considerations apply when selecting a substitute?

A: The LM2901EDR2G uses 14-SOIC surface-mount packaging. CMP04FSZ-REEL and LM239DT maintain this package, enabling direct PCB substitution. LM2901N/NOPB requires conversion to 14-DIP through-hole footprint, necessitating PCB layout modification. MAX516ACWG+T uses 24-SOIC packaging, which is physically incompatible with the original 14-SOIC footprint. Package selection must align with the target PCB design and assembly process.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed—CMP04FSZ-REEL, LM239DT, LM2901N/NOPB, and MAX516ACWG+T—are ROHS3 compliant, matching the compliance status of the LM2901EDR2G. All parts are also REACH unaffected and classified under ECCN EAR99.

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