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MCP9801T-M/MSG Equivalent & Substitute Parts
Part Overview
The MCP9801T-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 output interface. 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 |
| Resolution | 11 bits |
| Supply Voltage | 2.7V ~ 5.5V |
| Package Type | 8-MSOP (0.118", 3.00mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the MCP9801T-M/MSG is determined by strict equivalence across the following critical parameters:
- Sensor Type & Temperature Range: All substitutes must be digital local temperature sensors with -55°C to 125°C sensing capability
- Output Interface: I2C/SMBus protocol compatibility is mandatory
- Resolution: 11-bit resolution requirement
- Package & Pinout: 8-MSOP or 8-TSSOP/MSOP package with identical pin configuration
- Supply Voltage: Minimum 2.7V operation required; substitutes with lower minimum voltage (1.7V) remain compatible
- Compliance: ROHS3 compliance and EAR99 classification maintained across all alternatives
The substitute parts are grouped by manufacturer and base product number, with packaging variants (Bulk, Cut Tape, Tube, Tape & Reel) representing the same electrical device in different distribution formats.
Parameter Comparison
| Parameter | MCP9801T-M/MSG | AT30TS74-XM8M-B/T | AT30TS750A-XM8M-B/T | AT30TS75A-XM8M-T | AT30TSE752A-XM8M-B | AT30TSE754A-XM8M-B/T | AT30TSE758A-XM8M-T | STDS75DS2F |
|---|---|---|---|---|---|---|---|---|
| Sensor Type | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local | Digital, Local |
| 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 |
| Output Interface | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus |
| Resolution | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits | 11 bits |
| Supply Voltage | 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 | 2.7V ~ 5.5V |
| Accuracy (Best Case) | ±1°C | ±2°C | ±1°C | ±1°C | ±1°C | ±1°C | ±1°C | ±2°C |
| Package | 8-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 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
All listed substitute parts maintain full electrical and functional equivalence to the MCP9801T-M/MSG within the specified parameter constraints. Selection among substitutes should be based on:
Microchip Technology AT Series (AT30TS74, AT30TS750A, AT30TS75A, AT30TSE752A, AT30TSE754A, AT30TSE758A): These parts are direct Microchip alternatives with active product status and ROHS3 compliance. The AT30TS750A and AT30TSE754A/758A variants offer ±1°C accuracy matching the original part's best-case specification. Packaging variants (Bulk, Cut Tape, Tube, Tape & Reel) are available to match procurement requirements.
STMicroelectronics STDS75DS2F: This alternative from STMicroelectronics provides equivalent functionality with active product status and ROHS3 compliance. It maintains the original 2.7V minimum supply voltage specification and offers ±2°C accuracy with 11-bit resolution across the full -55°C to 125°C range.
All substitutes are REACH unaffected and classified as EAR99 for export control purposes, matching the original part's regulatory profile.
Frequently Asked Questions (FAQ)
Q: Can AT30TS74-XM8M-B replace MCP9801T-M/MSG directly?
A: Yes. Both devices share identical I2C/SMBus interface, 11-bit resolution, -55°C to 125°C temperature range, and 8-MSOP/8-TSSOP package footprint. The AT30TS74 operates at 1.7V minimum (versus 2.7V for the original), providing broader supply voltage compatibility. Accuracy differs at ±2°C versus the original's ±1°C specification.
Q: What is the difference between AT30TS750A and AT30TS75A?
A: Both are Microchip alternatives with identical electrical specifications: ±1°C accuracy, 11-bit resolution, I2C/SMBus interface, and -55°C to 125°C range. The primary difference is the maximum operating temperature specification in the test condition range (AT30TS750A: -40°C to 125°C; AT30TS75A: -40°C to 120°C). Both support the full -55°C to 125°C operating range.
Q: Are packaging variants (Bulk, Cut Tape, Tube, Tape & Reel) electrically identical?
A: Yes. Packaging designations (AT30TS74-XM8M-B, AT30TS74-XM8M-T, etc.) represent the same silicon device in different distribution formats. The electrical specifications, pin configuration, and functional behavior are identical. Selection depends on assembly process requirements and procurement volume.
Q: Does the STDS75DS2F from STMicroelectronics maintain full compatibility?
A: Yes. The STDS75DS2F provides equivalent I2C/SMBus interface, 11-bit resolution, and -55°C to 125°C temperature range. It maintains the original 2.7V minimum supply voltage and offers ±2°C accuracy. Pin configuration and package footprint (8-MSOP) are compatible with the original MCP9801T-M/MSG.
Q: What is the significance of MSL (Moisture Sensitivity Level) differences?
A: MSL ratings indicate moisture sensitivity during storage and handling. MSL 1 (Unlimited) allows indefinite storage without baking, while MSL 3 (168 Hours) requires baking before reflow if storage exceeds 168 hours in specified humidity conditions. This affects logistics and assembly procedures but does not impact electrical functionality or performance.
Q: Are all substitutes ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original MCP9801T-M/MSG specification. This ensures compatibility with environmental regulations and procurement requirements for restricted substance compliance.
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