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LM2903VDR2G Equivalent & Substitute Parts
Part Overview
The LM2903VDR2G is a dual general-purpose comparator manufactured by onsemi, housed in an 8-SOIC surface-mount package. This device features open-collector, rail-to-rail output configuration with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The part is currently in active production status with 4,761 units in stock. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements where alternative manufacturers or packaging formats may be preferred.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Part Number | LM2903VDR2G |
| Category | Linear Comparator |
| Type | General Purpose |
| Number of Elements | 2 |
| Output Type | Open-Collector, Rail-to-Rail |
| Voltage Supply (Single/Dual) | 2V ~ 36V, ±1V ~ 18V |
| Voltage Input Offset (Max) | 7mV @ 30V |
| Current Input Bias (Max) | 0.25µA @ 5V |
| Current Output (Typ) | 16mA @ 5V |
| Current Quiescent (Max) | 2.5mA |
| Operating Temperature | -40°C ~ 125°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the LM2903VDR2G are classified into two categories based on electrical and mechanical compatibility:
Direct Substitutes maintain identical electrical specifications and package footprint (8-SOIC, 0.154" width), differing only in manufacturer or packaging format (tube vs. cut tape vs. tape & reel). These parts are pin-compatible and functionally equivalent with no circuit modifications required.
Similar Substitutes share the same functional classification (dual general-purpose comparator, open-collector output, 8-SOIC package) and operate within the same supply voltage range (2V ~ 36V, ±1V ~ ±18V). However, they may exhibit variations in the following parameters:
- Voltage input offset tolerance
- Current output specifications
- Quiescent current consumption
- Operating temperature range
- Moisture sensitivity level (MSL)
- Package width (0.154" vs. 0.173")
All substitute parts listed maintain ROHS3 compliance and surface-mount configuration. Selection among substitutes depends on specific application requirements for input offset accuracy, output current capability, temperature range, and packaging format availability.
Parameter Comparison
| Part Number | Manufacturer | Voltage Supply | Input Offset (Max) | Output Current (Typ) | Quiescent Current (Max) | Temp Range | Package Width | Packaging Format | MSL |
|---|---|---|---|---|---|---|---|---|---|
| LM2903VDR2G | onsemi | 2V~36V, ±1V~18V | 7mV @ 30V | 16mA @ 5V | 2.5mA | -40°C ~ 125°C | 0.154" | Cut Tape (CT) & Digi-Reel® | 1 |
| LM2903D | STMicroelectronics | 2V~36V, ±1V~18V | 7mV @ 5V | 16mA @ 5V | 2.5mA | -40°C ~ 125°C | 0.154" | Tube | 1 |
| LM2903WDT | STMicroelectronics | 2V~36V, ±1V~18V | 7mV @ 30V | 20mA | 2.5mA | -40°C ~ 125°C | 0.154" | Tape & Reel (TR) | 1 |
| AS393AMTR-E1 | Diodes Incorporated | 2V~36V, ±1V~18V | 3mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 85°C | 0.154" | Tape & Reel (TR) | 1 |
| AS393AMTR-G1 | Diodes Incorporated | 2V~36V, ±1V~18V | 3mV @ 1.4V | 16mA | 1mA | -40°C ~ 85°C | 0.154" | Tape & Reel (TR) | 1 |
| AS393MTR-E1 | Diodes Incorporated | 2V~36V, ±1V~18V | 5mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 85°C | 0.154" | Tape & Reel (TR) | 3 |
| AS393MTR-G1 | Diodes Incorporated | 2V~36V, ±1V~18V | 5mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 85°C | 0.154" | Cut Tape (CT) & Digi-Reel® | 3 |
| BA10393F-E2 | Rohm Semiconductor | 2V~36V, ±1V~18V | 5mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 85°C | 0.173" | Cut Tape (CT) & Digi-Reel® | 1 |
| BA2903SF-E2 | Rohm Semiconductor | 2V~36V, ±1V~18V | 7mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 105°C | 0.173" | Tape & Reel (TR) | 1 |
| BA2903YF-CE2 | Rohm Semiconductor | 2V~36V, ±1V~18V | 4mV @ 5V | 16mA @ 5V | 1mA | -40°C ~ 125°C | 0.173" | Tape & Reel (TR) | 1 |
Engineering Selection Recommendations
Direct Substitution (No Circuit Modification Required):
LM2903D and LM2903WDT from STMicroelectronics are direct electrical equivalents with identical 8-SOIC (0.154" width) footprints. Both maintain ROHS3 compliance and MSL 1 rating. Selection between these and the primary part depends on packaging format availability: LM2903D is supplied in tube format, while LM2903WDT is supplied in tape & reel format. LM2903WDT provides slightly higher typical output current (20mA vs. 16mA).
Compatible Substitution (Same Footprint, Verified Electrical Compatibility):
AS393AMTR-E1, AS393AMTR-G1, AS393MTR-E1, and AS393MTR-G1 from Diodes Incorporated are functionally compatible with identical supply voltage range and package footprint. These parts exhibit lower quiescent current (1mA vs. 2.5mA) and improved input offset specifications (3mV to 5mV). Operating temperature range is limited to -40°C to 85°C, which is acceptable for non-extended-temperature applications. AS393MTR variants carry MSL 3 rating, requiring controlled moisture exposure during storage and handling.
Alternative Substitution (Different Package Width, Footprint Verification Required):
BA10393F-E2, BA2903SF-E2, and BA2903YF-CE2 from Rohm Semiconductor feature 8-SOP package with 0.173" width, which differs from the primary part's 0.154" width. PCB layout verification is required to confirm footprint compatibility. BA2903YF-CE2 is AEC-Q100 qualified for automotive applications and maintains the full -40°C to 125°C temperature range. BA2903SF-E2 extends the upper operating temperature to 105°C.
All listed substitutes maintain ROHS3 compliance and surface-mount configuration. Selection should prioritize parts with matching operating temperature range and MSL rating for the target application environment.
Frequently Asked Questions (FAQ)
Q: Can LM2903D be used as a direct replacement for LM2903VDR2G?
A: Yes. Both parts share identical electrical specifications, supply voltage range (2V ~ 36V, ±1V ~ ±18V), output type (open-collector, rail-to-rail), and 8-SOIC (0.154" width) package footprint. The primary difference is packaging format: LM2903D is supplied in tube format while LM2903VDR2G is supplied in cut tape & digi-reel format. No circuit modifications are required.
Q: What is the difference between AS393 and LM2903 series comparators?
A: Both are dual general-purpose comparators with identical supply voltage range and open-collector output configuration. Key differences include: AS393 series exhibits lower quiescent current (1mA vs. 2.5mA), improved input offset accuracy (3mV to 5mV vs. 7mV), and reduced operating temperature range (-40°C to 85°C vs. -40°C to 125°C). AS393 parts are suitable for applications where lower power consumption and tighter input offset tolerance are required within the standard temperature range.
Q: Can parts with 0.173" package width replace the 0.154" width package?
A: Package width compatibility depends on PCB layout design. The 0.173" width (BA10393F-E2, BA2903SF-E2, BA2903YF-CE2) represents a different physical footprint. Verify that the PCB pad layout and component placement accommodate the wider package before substitution. Pin count and spacing remain identical at 8-SOIC configuration.
Q: What does MSL 3 rating mean for AS393MTR-E1 and AS393MTR-G1?
A: MSL (Moisture Sensitivity Level) 3 indicates the component requires controlled moisture exposure during storage and handling. These parts must be stored in dry conditions and have a maximum floor life of 168 hours after opening the moisture barrier bag at 30°C and 60% relative humidity. MSL 1 parts (LM2903VDR2G, LM2903D, LM2903WDT) have unlimited floor life and are less sensitive to moisture.
Q: Which substitute offers the lowest quiescent current?
A: All Diodes Incorporated AS393 variants and Rohm Semiconductor BA series parts feature 1mA maximum quiescent current, compared to 2.5mA for the primary LM2903VDR2G. This represents a 60% reduction in standby power consumption, beneficial for battery-powered or low-power applications.
Q: Is BA2903YF-CE2 suitable for automotive applications?
A: Yes. BA2903YF-CE2 carries AEC-Q100 qualification and is specifically designed for automotive use. It maintains the full -40°C to 125°C operating temperature range and ROHS3 compliance. This part is recommended for automotive-grade designs requiring extended temperature operation.
Q: What is the maximum output current difference among substitutes?
A: LM2903WDT provides 20mA typical output current, while all other listed parts provide 16mA. This 25% difference may be significant in applications requiring high-current output switching. Verify application requirements before selecting LM2903WDT as a substitute.
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