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MCP9803-M/MSG Equivalent & Substitute Parts
Part Overview
The MCP9803-M/MSG 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 interface compatibility. This part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and electrical compatibility for new designs and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Sensor Type | Digital, Local |
| Sensing Temperature Range | -55°C ~ 125°C |
| Output Interface | I2C/SMBus |
| Supply Voltage | 2.7V ~ 5.5V |
| Resolution | 11 bits |
| Package Type | 8-MSOP (0.118", 3.00mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the MCP9803-M/MSG is determined by strict alignment with the following core parameters: digital local temperature sensing capability, operating range of -55°C to 125°C, 11-bit resolution, I2C/SMBus communication protocol, 8-MSOP package configuration, and surface mount technology. All identified substitute parts maintain these electrical and mechanical specifications. Substitutes are grouped by manufacturer and product status, with active parts from Microchip Technology (AT30 series) and STMicroelectronics (STDS75 series) providing direct functional equivalence. Packaging variants (Bulk, Cut Tape & Digi-Reel, Tube, Tape & Reel) do not affect electrical compatibility and are selected based on procurement requirements.
Parameter Comparison
| Parameter | MCP9803-M/MSG | AT30TS74-XM8M-B | AT30TS74-XM8M-T | AT30TS750A-XM8M-B | AT30TS750A-XM8M-T | AT30TS75A-XM8M-T | AT30TSE752A-XM8M-B | AT30TSE754A-XM8M-B | AT30TSE754A-XM8M-T | AT30TSE758A-XM8M-T | STDS75DS2F |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| Sensor Type | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local |
| Sensing Temperature Range | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Output Interface | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus |
| Supply Voltage Range | 2.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 1.7V ~ 5.5V | 2.7V ~ 5.5V |
| Resolution | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits |
| Accuracy (Best Case) | ±1°C | ±2°C | ±2°C | ±1°C | ±1°C | ±1°C | ±1°C | ±1°C | ±1°C | ±1°C | ±2°C |
| Package Type | 8-MSOP | 8-TSSOP/MSOP | 8-TSSOP/MSOP | 8-TSSOP/MSOP | 8-TSSOP/MSOP | 8-TSSOP/MSOP | 8-TSSOP/MSOP | 8-TSSOP/MSOP | 8-TSSOP/MSOP | 8-TSSOP/MSOP | 8-MSOP |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
All identified substitute parts maintain active product status with full ROHS3 compliance and REACH unaffected certification, ensuring regulatory alignment for current production environments. The Microchip Technology AT30 series substitutes (AT30TS74, AT30TS750A, AT30TS75A, AT30TSE752A, AT30TSE754A, AT30TSE758A) provide direct functional equivalence with extended supply voltage range (1.7V minimum versus 2.7V for the original part), enabling operation in lower-voltage applications. The STMicroelectronics STDS75DS2F offers an alternative from a different manufacturer while maintaining identical temperature range, resolution, and interface specifications with supply voltage matching the original specification (2.7V ~ 5.5V).
Selection between Microchip and STMicroelectronics options depends on supply chain strategy and existing vendor relationships. Within the Microchip AT30 family, parts with ±1°C accuracy (AT30TS750A, AT30TS75A, AT30TSE752A, AT30TSE754A, AT30TSE758A) provide improved accuracy over the original ±1°C specification at best case, while AT30TS74 offers ±2°C accuracy. Packaging variants (Bulk, Cut Tape & Digi-Reel, Tube, Tape & Reel) are selected based on procurement volume and assembly process requirements without affecting electrical performance.
Frequently Asked Questions (FAQ)
Q: Can AT30TS74-XM8M-B directly replace MCP9803-M/MSG in existing designs?
A: Yes. Both parts share identical temperature sensing range (-55°C to 125°C), 11-bit resolution, I2C/SMBus interface, and 8-MSOP package footprint. The AT30TS74 operates across an extended supply voltage range (1.7V ~ 5.5V) compared to the original (2.7V ~ 5.5V), providing broader application flexibility. Accuracy differs at best case (±2°C versus ±1°C), which must be evaluated against application requirements.
Q: What is the difference between AT30TS750A and AT30TS75A?
A: Both parts provide identical electrical specifications with ±1°C accuracy and -55°C to 125°C operating range. The primary distinction is moisture sensitivity level: AT30TS750A carries MSL 3 (168 hours), while AT30TS75A carries MSL 3 (168 hours). Selection depends on storage and handling conditions in your supply chain.
Q: Is STDS75DS2F compatible with the original MCP9803-M/MSG?
A: Yes. The STDS75DS2F maintains identical temperature range, resolution, I2C/SMBus interface, and 8-MSOP package configuration. Supply voltage range matches the original specification (2.7V ~ 5.5V). This part represents a cross-manufacturer alternative from STMicroelectronics with ±2°C accuracy at best case.
Q: How do packaging variants (Bulk, Cut Tape, Tube, Tape & Reel) affect compatibility?
A: Packaging variants affect procurement and assembly logistics only. Electrical and mechanical specifications remain identical across all packaging options for a given part number. Selection is based on production volume, assembly equipment compatibility, and inventory management practices.
Q: Which substitute offers the best accuracy specification?
A: AT30TS750A-XM8M-B, AT30TS750A-XM8M-T, AT30TS75A-XM8M-T, AT30TSE752A-XM8M-B, AT30TSE754A-XM8M-B, AT30TSE754A-XM8M-T, and AT30TSE758A-XM8M-T all provide ±1°C accuracy at best case, matching the original MCP9803-M/MSG specification. AT30TS74 and STDS75DS2F offer ±2°C accuracy.
Q: Are all substitutes RoHS3 compliant?
A: Yes. All identified substitute parts carry ROHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements for electronics manufacturing.
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