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MCP9803-M/SNG Equivalent & Substitute Parts
Part Overview
The MCP9803-M/SNG is a digital temperature sensor manufactured by Microchip Technology, designed for local temperature measurement across the -55°C to 125°C range with 11-bit resolution and I2C/SMBus output interface. This component operates on a 2.7V to 5.5V supply and is housed in an 8-SOIC surface mount package. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility while meeting current supply chain requirements.
Substiute Parts
Key Parameters
| Parameter | MCP9803-M/SNG |
|---|---|
| Sensor Type | Digital, Local |
| Sensing Temperature Range | -55°C ~ 125°C |
| Output Type | I2C/SMBus |
| Voltage Supply | 2.7V ~ 5.5V |
| Resolution | 11 bits |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Accuracy (Best / Worst) | ±1°C / ±3°C |
| Operating Temperature | -55°C ~ 125°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the MCP9803-M/SNG is determined by the following critical parameters:
Primary Compatibility Criteria:
- Sensor Type: Digital, Local
- Sensing Temperature Range: -55°C ~ 125°C (full range coverage required)
- Output Interface: I2C/SMBus
- Package / Case: 8-SOIC (0.154", 3.90mm Width)
- Mounting Type: Surface Mount
- Resolution: 11 bits (preferred) or 9 bits (acceptable with functional equivalence)
Secondary Compatibility Criteria:
- Voltage Supply Range: Must encompass or be compatible with 2.7V ~ 5.5V
- Accuracy: ±1°C to ±3°C range
- RoHS Compliance: ROHS3 Compliant
All substitute parts listed maintain the core functional parameters of digital local temperature sensing, I2C/SMBus communication, 8-SOIC packaging, and full -55°C to 125°C operating range. Variations in supply voltage range, resolution, and accuracy specifications are noted where they differ from the main part.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Sensing Temp Range | Output Type | Supply Voltage | Resolution | Accuracy (Best/Worst) | Package | Packaging Type |
|---|---|---|---|---|---|---|---|---|---|
| MCP9803-M/SNG | Microchip Technology | Obsolete | -55°C ~ 125°C | I2C/SMBus | 2.7V ~ 5.5V | 11 b | ±1°C / ±3°C | 8-SOIC | — |
| AT30TS74-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±2°C / ±3°C | 8-SOIC | Tube |
| AT30TS74-SS8M-T | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±2°C / ±3°C | 8-SOIC | Cut Tape (CT) & Digi-Reel® |
| AT30TS750A-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C / ±3°C | 8-SOIC | Tube |
| AT30TS75A-SS8M-T | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C / ±3°C | 8-SOIC | Tape & Reel (TR) |
| AT30TSE752A-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C / ±3°C | 8-SOIC | Tube |
| AT30TSE752A-SS8M-T | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C / ±3°C | 8-SOIC | Tape & Reel (TR) |
| AT30TSE754A-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C / ±3°C | 8-SOIC | Tube |
| AT30TSE758A-SS8M-B | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C / ±3°C | 8-SOIC | Tube |
| AT30TSE758A-SS8M-T | Microchip Technology | Active | -55°C ~ 125°C | I2C/SMBus | 1.7V ~ 5.5V | 11 b | ±1°C / ±3°C | 8-SOIC | Tape & Reel (TR) |
| STLM75M2F | STMicroelectronics | Active | -55°C ~ 125°C | I2C/SMBus | 2.7V ~ 5.5V | 9 b | ±2°C / ±3°C | 8-SOIC | Cut Tape (CT) & Digi-Reel® |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
AT30TSE752A-SS8M-T and AT30TSE758A-SS8M-T are the preferred direct substitutes. Both are manufactured by Microchip Technology with active product status, maintain identical sensing temperature range (-55°C to 125°C), 11-bit resolution, I2C/SMBus interface, and 8-SOIC packaging. These parts achieve ±1°C accuracy matching the MCP9803-M/SNG specification and are ROHS3 compliant. The extended inventory availability (17,632 and 1,038 units respectively) supports supply chain continuity.
Secondary Substitutes (Functional Equivalence):
AT30TS750A-SS8M-B, AT30TS75A-SS8M-T, AT30TSE754A-SS8M-B, and AT30TSE758A-SS8M-B maintain full parameter compatibility with ±1°C accuracy and 11-bit resolution. These components are active Microchip Technology products with ROHS3 compliance and adequate inventory levels.
Alternative Substitute (Resolution Trade-off):
STLM75M2F from STMicroelectronics provides functional substitution with 9-bit resolution instead of 11-bit. This part maintains the -55°C to 125°C operating range, I2C/SMBus interface, 8-SOIC packaging, and 2.7V to 5.5V supply voltage compatibility. The ±2°C accuracy specification and 9-bit resolution represent a functional trade-off suitable for applications where reduced resolution is acceptable. ROHS3 compliance and high inventory (15,773 units) support deployment.
Packaging Considerations:
Tube packaging (AT30TS74-SS8M-B, AT30TS750A-SS8M-B, AT30TSE752A-SS8M-B, AT30TSE754A-SS8M-B, AT30TSE758A-SS8M-B) is appropriate for lower-volume applications. Cut Tape & Digi-Reel® and Tape & Reel packaging options support automated assembly processes.
Frequently Asked Questions (FAQ)
Q: Can AT30TS74-SS8M-B replace MCP9803-M/SNG directly?
A: Yes, with one specification difference. AT30TS74-SS8M-B maintains identical package, interface, temperature range, and resolution. The accuracy specification is ±2°C (worst case) compared to ±1°C for the MCP9803-M/SNG. Both parts are ROHS3 compliant and operate on compatible supply voltages. The lower supply voltage minimum (1.7V vs. 2.7V) provides additional design flexibility.
Q: What is the difference between AT30TSE752A-SS8M-T and AT30TSE758A-SS8M-T?
A: Both parts are functionally equivalent substitutes for the MCP9803-M/SNG with identical electrical specifications: 11-bit resolution, ±1°C accuracy, -55°C to 125°C range, I2C/SMBus interface, and 8-SOIC packaging. The primary difference is inventory availability (17,632 units for AT30TSE752A-SS8M-T versus 1,038 units for AT30TSE758A-SS8M-T) and packaging format (Tape & Reel for both).
Q: Is STLM75M2F a suitable replacement?
A: STLM75M2F from STMicroelectronics is functionally compatible with the MCP9803-M/SNG for applications tolerating 9-bit resolution instead of 11-bit. The part maintains the same temperature range, I2C/SMBus interface, 8-SOIC package, and supply voltage compatibility (2.7V to 5.5V). Accuracy is ±2°C. This substitute is appropriate when resolution reduction is acceptable for the application.
Q: What packaging options are available?
A: Substitute parts are available in three packaging formats: Tube (for lower-volume manual assembly), Cut Tape & Digi-Reel® (for semi-automated processes), and Tape & Reel (for full automated assembly). Selection depends on production volume and assembly equipment capabilities.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental certification of the MCP9803-M/SNG.
Q: What is the supply voltage compatibility range?
A: The MCP9803-M/SNG operates on 2.7V to 5.5V. Most Microchip Technology substitutes (AT30TS and AT30TSE series) support a lower minimum of 1.7V, providing expanded design flexibility. STLM75M2F maintains the 2.7V to 5.5V range. All substitutes are compatible with standard 3.3V and 5V supply rails.
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