BA2903F-E2 Equivalent & Substitute Parts

Part Overview

The BA2903F-E2 is a dual general-purpose comparator manufactured by Rohm Semiconductor in 8-SOP surface-mount packaging. This device operates across a wide supply voltage range (2V to 36V single supply, ±1V to ±18V dual supply) and features open-collector output configuration suitable for logic-level interfacing. The part is currently active in production 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 or temperature grades are required for specific applications, or when sourcing from multiple manufacturers is needed for supply chain resilience.

Key Parameters

Parameter	BA2903F-E2 Specification
Number of Comparators	2
Output Type	Open-Collector
Supply Voltage Range	2V ~ 36V (single), ±1V ~ 18V (dual)
Input Offset Voltage (Max)	7mV @ 5V
Input Bias Current (Max)	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V
Quiescent Current (Max)	1mA
Operating Temperature	-40°C ~ 125°C
Package	8-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the BA2903F-E2 is determined by the following critical parameters:

Mandatory Matching Criteria:

Dual comparator configuration (2 elements)
Open-collector output type
Supply voltage range: 2V ~ 36V single supply, ±1V ~ 18V dual supply
Input offset voltage maximum: 7mV or lower
Input bias current maximum: 0.25µA or lower
Output current capability: 16mA or higher
8-pin SOIC/SOP package format
Surface-mount technology
ROHS3 compliance

Acceptable Variations:

Operating temperature range may extend beyond -40°C to 125°C
Quiescent current may be higher than 1mA
Package width tolerance (0.154" to 0.173")
Packaging format (Tape & Reel, Cut Tape, Tube)
Manufacturer source

Parts meeting these criteria are classified as parametric equivalents or similar alternatives suitable for direct substitution in the BA2903F-E2 application.

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Package	Product Status
BA2903F-E2	Rohm Semiconductor	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	8-SOIC (4.40mm)	Active
BA2903YF-MGE2	Rohm Semiconductor	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	8-SOIC (4.40mm)	Active
AS393MTR-E1	Diodes Incorporated	2V~36V, ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	8-SOIC (3.90mm)	Active
LM193DT	STMicroelectronics	2V~36V, ±1V~18V	5mV @ 30V	0.25µA @ 5V	18mA @ 5V	2.5mA	-55°C ~ 125°C	8-SOIC (3.90mm)	Active
LM2903D	STMicroelectronics	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	8-SOIC (3.90mm)	Active
LM2903DR	UMW	2V~30V, ±1V~±15V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOIC (3.90mm)	Active
LM2903DRG3	Texas Instruments	2V~36V, ±1V~18V	7mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	8-SOIC (3.90mm)	Active
LM2903DRG4	Texas Instruments	2V~36V, ±1V~18V	7mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	8-SOIC (3.90mm)	Obsolete
LM2903DT	STMicroelectronics	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	8-SOIC (3.90mm)	Active
LM2903YDT	STMicroelectronics	2V~36V, ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	8-SOIC (3.90mm)	Active
LM293ADT	STMicroelectronics	2V~36V, ±1V~18V	2mV @ 30V	0.1µA @ 5V	18mA @ 5V	2.5mA	-40°C ~ 105°C	8-SOIC (3.90mm)	Active

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement): BA2903YF-MGE2 from Rohm Semiconductor is the parametric equivalent to BA2903F-E2. Both parts share identical electrical specifications and package dimensions. The BA2903YF-MGE2 carries automotive-grade qualification (AEC-Q100) and is suitable for applications requiring enhanced reliability standards.

Active Alternatives (Full Compatibility): The following parts meet all mandatory substitution criteria and are currently in active production:

LM2903DT, LM2903D, LM2903DRG3, and LM2903YDT all provide equivalent performance with supply voltage and output current specifications matching or exceeding the BA2903F-E2. These parts are sourced from STMicroelectronics and Texas Instruments.
LM193DT from STMicroelectronics offers superior input offset voltage performance (5mV @ 30V) and extended operating temperature range (-55°C to 125°C).
LM293ADT from STMicroelectronics provides the lowest input offset voltage (2mV @ 30V) and lowest input bias current (0.1µA @ 5V) among all alternatives, suitable for precision applications.

Limited Compatibility:

AS393MTR-E1 (Diodes Incorporated) meets electrical specifications but operates only to 85°C maximum, restricting use in high-temperature environments.
LM2903DR (UMW) has reduced supply voltage range (2V to 30V single supply) and narrower operating temperature window (0°C to 70°C), limiting applicability to industrial and extended-temperature designs.

Obsolete Status: LM2903DRG4 from Texas Instruments is marked obsolete. While inventory remains available and electrical specifications are equivalent, new designs should not incorporate this part.

Frequently Asked Questions (FAQ)

Q: Can I substitute BA2903F-E2 with any of the listed alternatives without circuit modification?

A: Yes, all active parts listed in the Parameter Comparison table are direct substitutes. The 8-pin SOIC package pinout is standardized across all alternatives. However, verify your specific application's temperature and supply voltage requirements against each part's operating range before selection.

Q: What is the difference between BA2903F-E2 and BA2903YF-MGE2?

A: Both parts are electrically and mechanically identical. BA2903YF-MGE2 carries AEC-Q100 automotive qualification, making it suitable for automotive and mission-critical applications requiring enhanced reliability documentation and traceability.

Q: Why does LM2903DR have a narrower supply voltage range?

A: LM2903DR from UMW is specified for 2V to 30V single supply operation, compared to the BA2903F-E2 range of 2V to 36V. Applications requiring operation above 30V must use alternative parts such as LM2903DT or LM2903DRG3.

Q: Is LM2903DRG4 suitable for new designs?

A: No. LM2903DRG4 is marked obsolete and should not be used in new designs. Use LM2903DRG3 from Texas Instruments as the active alternative instead.

Q: What is the package width difference between 4.40mm and 3.90mm SOIC?

A: Both are standard 8-pin SOIC packages with identical pinout and electrical performance. The 4.40mm width (BA2903F-E2, BA2903YF-MGE2) and 3.90mm width (most alternatives) are both industry-standard SOIC variants. PCB footprints must match the specific package width of the selected part.

Q: Which substitute offers the best input offset voltage performance?

A: LM293ADT provides the lowest input offset voltage at 2mV @ 30V, followed by AS393MTR-E1 and LM193DT at 5mV. The BA2903F-E2 and most LM2903 variants specify 7mV maximum. Select based on your application's precision requirements.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All parts in the Parameter Comparison table carry ROHS3 compliance certification, meeting environmental and hazardous substance restrictions.

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