BA2903WF-E2 Equivalent & Substitute Parts

Part Overview

The BA2903WF-E2 is a dual general-purpose comparator manufactured by ROHM Semiconductor in an 8-SOP package with open-collector output configuration. This device operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), making it suitable for analog signal comparison applications across diverse voltage domains.

The BA2903WF-E2 carries a "Not For New Designs" product status, indicating that ROHM has discontinued active development for this part number. This status necessitates identification of equivalent and substitute components to ensure design continuity, supply chain reliability, and access to actively supported alternatives with comparable electrical and mechanical characteristics.

Key Parameters

Parameter	BA2903WF-E2 Specification
Manufacturer	ROHM Semiconductor
Package Type	8-SOIC (0.173", 4.40mm Width)
Number of Comparators	2
Output Type	Open-Collector
Supply Voltage Range	2V ~ 36V (Single), ±1V ~ ±18V (Dual)
Input Offset Voltage (Max)	5mV @ 5V
Input Bias Current (Max)	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V
Quiescent Current (Max)	1mA
Propagation Delay (Max)	400ns (Typ)
Operating Temperature	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BA2903WF-E2 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Dual comparator configuration (2 elements)
Open-collector output type
Supply voltage range encompassing 2V ~ 36V single supply or ±1V ~ ±18V dual supply capability
Input offset voltage, input bias current, and output current specifications within acceptable tolerance
Operating temperature range of -40°C ~ 125°C

Mechanical Compatibility Requirements:

Surface-mount package in 8-pin SOIC or equivalent footprint
Pin-compatible or functionally equivalent pinout
RoHS3 compliance and REACH unaffected status

Substitution Categories:

Parametric Equivalents maintain identical electrical specifications and package dimensions, enabling direct replacement without circuit modification. BA82903YF-CE2 qualifies as a parametric equivalent with matching supply voltage range, input/output characteristics, and 8-SOIC package, though with different moisture sensitivity classification (MSL 3 vs. MSL 1).

Direct Equivalents provide functionally compatible alternatives from different manufacturers with comparable electrical performance and package compatibility. LM2903DT (STMicroelectronics) and AS393MTR-E1 (Diodes Incorporated) operate within the same supply voltage and temperature ranges with matching output current specifications.

Similar Alternatives offer comparable functionality with minor parameter variations or different package geometries. These include AS393MMTR-G1 (8-MSOP package), LMV393IPWR (8-TSSOP package), and AZV393MMTR-G1 (reduced supply voltage range 2.5V ~ 5.5V). These alternatives require PCB layout adjustment due to different package footprints.

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Temp Range	Product Status
BA2903WF-E2	ROHM	8-SOIC (4.40mm)	2V~36V / ±1V~±18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	Not For New Designs
BA82903YF-CE2	ROHM	8-SOIC (4.40mm)	2V~36V / ±1V~±18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	Active
LM2903FJ-E2	ROHM	8-SOIC (3.90mm)	3V~32V / ±1.5V~±16V	4.5mV @ 1.4V	0.05µA @ 1.4V	16mA @ 5V	1mA	-40°C ~ 125°C	Active
LM2903DT	STMicroelectronics	8-SOIC (3.90mm)	2V~36V / ±1V~±18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	Active
AS393MTR-E1	Diodes Inc.	8-SOIC (3.90mm)	2V~36V / ±1V~±18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
AS393MTR-G1	Diodes Inc.	8-SOIC (3.90mm)	2V~36V / ±1V~±18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
AS393MMTR-G1	Diodes Inc.	8-MSOP (3.00mm)	2V~36V / ±1V~±18V	5mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 85°C	Active
AZV393MMTR-G1	Diodes Inc.	8-MSOP (3.00mm)	2.5V~5.5V / N/A	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	200µA	-40°C ~ 85°C	Active
LMV393IPWR	National Semiconductor	8-TSSOP (4.40mm)	2.7V~5.5V / N/A	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	250µA	-40°C ~ 85°C	Active
LMV393IDDUR	Texas Instruments	8-VSSOP (2.30mm)	2.7V~5.5V / N/A	7mV @ 5V	0.25µA @ 5V	84mA @ 5V	250µA	-40°C ~ 85°C	Last Time Buy

Engineering Selection Recommendations

Direct Replacement (No PCB Modification Required):

BA82903YF-CE2 is the primary direct replacement for BA2903WF-E2. Both devices share identical electrical specifications, supply voltage range (2V ~ 36V single / ±1V ~ ±18V dual), and 8-SOIC package footprint (4.40mm width). BA82903YF-CE2 carries Active product status with ROHS3 compliance and REACH unaffected certification. The only distinction is moisture sensitivity level (MSL 3 vs. MSL 1), which does not affect electrical performance in standard operating conditions.

Pin-Compatible Alternatives (Same Package Footprint):

LM2903FJ-E2 (ROHM) and LM2903DT (STMicroelectronics) both utilize 8-SOIC packages with 3.90mm width, requiring PCB footprint verification before substitution. LM2903DT maintains the full supply voltage range (2V ~ 36V / ±1V ~ ±18V) with Active product status and ROHS3 compliance. LM2903FJ-E2 operates within a narrower supply range (3V ~ 32V / ±1.5V ~ ±16V) and carries Active status.

AS393MTR-E1 and AS393MTR-G1 (Diodes Incorporated) provide electrically equivalent alternatives in 8-SOIC packages (3.90mm width) with matching supply voltage range and output specifications. Both carry Active product status with ROHS3 compliance. Operating temperature range is limited to -40°C ~ 85°C compared to the original -40°C ~ 125°C specification.

Package-Variant Alternatives (PCB Layout Modification Required):

AS393MMTR-G1 (Diodes Incorporated) offers equivalent electrical performance in an 8-MSOP package (3.00mm width), requiring PCB redesign. Operating temperature range is -40°C ~ 85°C.

AZV393MMTR-G1 and LMV393IPWR operate with restricted supply voltage range (2.5V ~ 5.5V single supply only) and higher output current capability (84mA vs. 16mA). These alternatives are suitable only for low-voltage applications and require circuit validation.

LMV393IDDUR (Texas Instruments) carries Last Time Buy status, indicating discontinued production. This part should be avoided for new designs despite Active classification in the dataset.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original BA2903WF-E2 certification requirements.

Frequently Asked Questions (FAQ)

Q: Can BA82903YF-CE2 replace BA2903WF-E2 without any circuit modifications?

A: Yes. BA82903YF-CE2 is a parametric equivalent with identical electrical specifications and package footprint. The difference in moisture sensitivity level (MSL 3 vs. MSL 1) does not affect electrical performance in standard operating environments. Both devices are ROHS3 compliant and REACH unaffected.

Q: What is the key difference between the 8-SOIC (4.40mm) and 8-SOIC (3.90mm) packages?

A: The package width differs, affecting PCB footprint dimensions. The 4.40mm width (BA2903WF-E2, BA82903YF-CE2) is wider than the 3.90mm variant (LM2903DT, AS393MTR-E1, AS393MTR-G1). Pin pitch and electrical characteristics remain identical. PCB layout must accommodate the specific package width.

Q: Why do some alternatives have lower operating temperature ranges (-40°C ~ 85°C vs. -40°C ~ 125°C)?

A: Different manufacturers specify different maximum operating temperatures based on device characterization and reliability testing. AS393 series (Diodes Incorporated) and LMV393 series (Texas Instruments, National Semiconductor) are rated to 85°C maximum. Applications requiring operation above 85°C must use BA2903WF-E2, BA82903YF-CE2, LM2903FJ-E2, or LM2903DT.

Q: Can LMV393IPWR or AZV393MMTR-G1 be used in place of BA2903WF-E2?

A: These alternatives are not direct substitutes. Both operate with restricted supply voltage range (2.5V ~ 5.5V single supply only) and cannot support the original device's full range (2V ~ 36V). Additionally, they feature higher output current (84mA vs. 16mA) and higher quiescent current consumption. Use only if your application operates exclusively within the 2.5V ~ 5.5V range and can accommodate the increased power consumption.

Q: What does "Not For New Designs" product status mean?

A: This status indicates that ROHM Semiconductor has discontinued active development and support for BA2903WF-E2. The manufacturer recommends using alternative part numbers for new designs. Existing inventory may remain available, but long-term supply cannot be guaranteed. BA82903YF-CE2 is the recommended replacement carrying Active product status.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original BA2903WF-E2 environmental certifications.

Q: Which substitute offers the best supply availability?

A: AS393MTR-G1 (Diodes Incorporated) shows the highest inventory level at 300,400 pieces. AS393MTR-E1 (Diodes Incorporated) provides 354,160 pieces. Both are actively produced and widely available through distribution channels.

Q: Can I use an 8-MSOP package device if my PCB is designed for 8-SOIC?

A: No. Package footprints are not interchangeable. 8-MSOP (3.00mm width) and 8-SOIC (3.90mm or 4.40mm width) have different pin spacing and land patterns. PCB redesign is required to accommodate package variants. Attempting to use incompatible packages will result in assembly failure or electrical malfunction.

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