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BA2903SF-E2 Equivalent & Substitute Parts
Part Overview
The BA2903SF-E2 is a dual general-purpose comparator manufactured by Rohm Semiconductor in an 8-SOP surface-mount package. This active component operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), with open-collector output configuration suitable for logic-level interfacing. The device is in active product status with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching functional specifications, electrical performance parameters, and package compatibility to ensure direct circuit board replacement capability.
Substiute Parts
Key Parameters
| Parameter | BA2903SF-E2 Specification |
|---|---|
| Manufacturer | Rohm Semiconductor |
| Package / Case | 8-SOIC (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Number of Elements | 2 |
| Output Type | Open-Collector |
| Voltage - Supply, Single/Dual (±) | 2V ~ 36V, ±1V ~ 18V |
| Voltage - Input Offset (Max) | 7mV @ 5V |
| Current - Input Bias (Max) | 0.25µA @ 5V |
| Current - Output (Typ) | 16mA @ 5V |
| Current - Quiescent (Max) | 1mA |
| Operating Temperature | -40°C ~ 105°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the BA2903SF-E2 are grouped based on the following critical parameters that determine functional equivalence:
Primary Matching Criteria:
- Dual comparator configuration (2 elements)
- Open-collector output type
- Supply voltage range compatibility (minimum 2V ~ 36V single supply or ±1V ~ ±18V dual supply)
- Input offset voltage within acceptable tolerance
- Input bias current specification
- Output current capability (minimum 16mA)
- Quiescent current specification
- Surface-mount package format
- Active product status
- ROHS3 compliance
Package Considerations: Substitutes are available in 8-SOIC and 8-MSOP packages. The 8-SOIC package (0.154", 3.90mm width) represents the most common footprint match, though the original BA2903SF-E2 uses a slightly wider 8-SOIC variant (0.173", 4.40mm width). Parts with 8-MSOP packaging require PCB layout verification due to different pin spacing.
Voltage and Temperature Range: Substitutes maintain the core 2V ~ 36V supply range. Some alternatives extend the operating temperature range to -55°C ~ 125°C, providing enhanced performance margin in extreme environments. Parts with restricted supply ranges (2.5V ~ 5.5V) are listed but require application voltage verification before selection.
Parameter Comparison
| Part Number | Manufacturer | Package | Supply Voltage | Input Offset (Max) | Output Current (Typ) | Quiescent Current (Max) | Operating Temp | MSL |
|---|---|---|---|---|---|---|---|---|
| BA2903SF-E2 | Rohm Semiconductor | 8-SOIC (4.40mm) | 2V ~ 36V, ±1V ~ 18V | 7mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 105°C | 1 |
| AS393AMTR-E1 | Diodes Incorporated | 8-SOIC (3.90mm) | 2V ~ 36V, ±1V ~ 18V | 3mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 85°C | 1 |
| AS393AMTR-G1 | Diodes Incorporated | 8-SOIC (3.90mm) | 2V ~ 36V, ±1V ~ 18V | 3mV @ 1.4V | 16mA | 1mA | -40°C ~ 85°C | 1 |
| AS393MTR-E1 | Diodes Incorporated | 8-SOIC (3.90mm) | 2V ~ 36V, ±1V ~ 18V | 5mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 85°C | 3 |
| AS393MTR-G1 | Diodes Incorporated | 8-SOIC (3.90mm) | 2V ~ 36V, ±1V ~ 18V | 5mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 85°C | 3 |
| AZV393MMTR-G1 | Diodes Incorporated | 8-MSOP (3.00mm) | 2.5V ~ 5.5V | 7mV @ 5V | 84mA @ 5V | 200µA | -40°C ~ 85°C | 3 |
| AZV393MTR-G1 | Diodes Incorporated | 8-SOIC (3.90mm) | 2.5V ~ 5.5V | 7mV @ 5V | 84mA | 200µA | -40°C ~ 85°C | 3 |
| LM193DR | UMW | 8-SOIC (3.90mm) | 2V ~ 32V, ±1V ~ 16V | 5mV | 16mA | 1mA | -55°C ~ 125°C | 1 |
| LM193DT | STMicroelectronics | 8-SOIC (3.90mm) | 2V ~ 36V, ±1V ~ 18V | 5mV @ 30V | 18mA @ 5V | 2.5mA | -55°C ~ 125°C | 1 |
| LM2903AVQDR | Texas Instruments | 8-SOIC (3.90mm) | 2V ~ 36V, ±1V ~ 18V | 2mV @ 32V | 20mA | 2.5mA | -40°C ~ 125°C | 1 |
| LM2903AVQDRG4Q1 | Texas Instruments | 8-SOIC (3.90mm) | 2V ~ 36V, ±1V ~ 18V | 2mV @ 5V | 20mA | 2.5mA | -40°C ~ 125°C | 1 |
Engineering Selection Recommendations
Direct Substitutes (Highest Compatibility): AS393AMTR-E1, AS393AMTR-G1, AS393MTR-E1, and AS393MTR-G1 from Diodes Incorporated maintain full supply voltage range compatibility (2V ~ 36V, ±1V ~ 18V) with matching output current specifications. These parts are ROHS3 compliant with MSL ratings of 1 or 3. The narrower 8-SOIC package (3.90mm width) requires PCB footprint verification against the original 4.40mm width specification.
Extended Temperature Range Alternatives: LM193DR (UMW), LM193DT (STMicroelectronics), LM2903AVQDR, and LM2903AVQDRG4Q1 (Texas Instruments) extend operating temperature to -55°C ~ 125°C, suitable for industrial and automotive applications. LM193DT and LM2903 series maintain full voltage range compatibility. LM2903AVQDRG4Q1 carries AEC-Q100 automotive qualification. All are ROHS3 compliant with MSL 1 rating.
Restricted Voltage Range Alternatives: AZV393MMTR-G1 and AZV393MTR-G1 operate within 2.5V ~ 5.5V supply range, limiting application to low-voltage systems. These parts feature higher output current capability (84mA) and lower quiescent current (200µA), suitable for specific low-power designs. Both use MSL 3 rating and require application voltage verification.
Compliance and Certification: All listed substitutes maintain ROHS3 compliance and REACH unaffected status. LM2903AVQDRG4Q1 includes AEC-Q100 automotive qualification for mission-critical applications. Moisture sensitivity levels range from 1 (unlimited) to 3 (168 hours), affecting storage and handling requirements.
Frequently Asked Questions (FAQ)
Q: Can AS393MTR-E1 directly replace BA2903SF-E2 on the PCB? A: AS393MTR-E1 provides electrical equivalence with matching supply voltage range, output type, and current specifications. However, the package width differs (3.90mm versus 4.40mm). Verify PCB footprint compatibility before assembly. Pin configuration and spacing are identical for 8-SOIC packages.
Q: What is the difference between AS393AMTR-E1 and AS393MTR-E1? A: Both are Diodes Incorporated dual comparators with identical supply voltage range and output current. AS393AMTR-E1 specifies lower input offset voltage (3mV @ 5V) and carries MSL 1 rating. AS393MTR-E1 specifies 5mV @ 5V offset with MSL 3 rating. Selection depends on offset voltage tolerance requirements and moisture sensitivity constraints.
Q: Why do AZV393 parts have higher output current but restricted voltage range? A: AZV393 series is optimized for low-voltage applications (2.5V ~ 5.5V) with enhanced output current capability (84mA) and reduced quiescent current (200µA). These specifications suit battery-powered and low-power designs. Applications requiring the full 2V ~ 36V range must use AS393 or LM series alternatives.
Q: Is LM2903AVQDRG4Q1 suitable for automotive applications? A: LM2903AVQDRG4Q1 carries AEC-Q100 automotive qualification and extended temperature range (-40°C ~ 125°C). It maintains full supply voltage compatibility and ROHS3 compliance. Verify specific automotive qualification requirements against application standards before selection.
Q: What does MSL 3 (168 Hours) mean for AS393MTR-E1 and AS393MTR-G1? A: MSL 3 indicates moisture sensitivity level 3 with 168-hour floor life. Components must be stored in dry conditions and used within 168 hours of package opening. MSL 1 (unlimited) parts like BA2903SF-E2 have no time-based storage restrictions. Select based on manufacturing process and storage capability.
Q: Can LM193DR operate at the full 36V supply voltage? A: LM193DR specifies maximum supply voltage of 32V (single supply) or ±16V (dual supply), slightly below the BA2903SF-E2 specification of 36V or ±18V. Applications requiring operation above 32V single supply must use AS393 or LM2903 series alternatives.
Q: What is the significance of input offset voltage differences between substitutes? A: Input offset voltage determines comparator accuracy in precision applications. BA2903SF-E2 specifies 7mV @ 5V. AS393AMTR-E1 offers superior 3mV @ 5V, while LM2903AVQDR provides 2mV @ 32V. Lower offset voltage improves threshold accuracy but may increase cost. Select based on application precision requirements.
Q: Are 8-MSOP packages (AZV393MMTR-G1) compatible with 8-SOIC PCB layouts? A: No. 8-MSOP (3.00mm width) and 8-SOIC (3.90mm width) packages have different pin spacing and footprints. PCB redesign is required for 8-MSOP substitution. Use 8-SOIC alternatives (AS393, LM193, LM2903 series) for direct footprint compatibility.
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