MCP98242T-BE/ST

Thermal Management Overview

The MCP98242 is a digital temperature sensor with an integrated 256-byte Serial EEPROM designed for JEDEC JC42.4 Mobile Platform Memory Module compliance. It operates within a voltage range of 3.0V to 3.6V and features a 2-wire I²C/SMBus compatible interface. The sensor provides accuracy of ±0.5°C/±1°C (typ./max.) from +75°C to +95°C, and ±1°C/±2°C from +40°C to +125°C. Shutdown current is maximized at 3 µA. The device supports user-programmable registers for temperature event boundaries and critical outputs.

Thermal Management Feature Summary

• Integrates a high-accuracy digital temperature sensor with a 256-byte Serial EEPROM for SPD data storage.
• Complies with JEDEC Specification JC42.4 for mobile platform memory module thermal sensing.
• Features software write protection for the lower 128 bytes of EEPROM to secure vendor information.
• Provides configurable open-drain Event output for thermostat or interrupt operations.

Thermal Management Applications

• DIMM Modules
• Laptops, Personal Computers and Servers
• Hard Disk Drives and Other PC Peripherals

Thermal Management Procurement Notes

Verify the specific package suffix (BE/ST) against Microchip's official ordering guide to confirm the exact physical footprint, such as DFN-8, TDFN-8, UDFN-8, or TSSOP-8. Ensure the component matches the required address pin configuration and that the datasheet revision aligns with your design specifications. Cross-reference the part number with authorized distributors to confirm authenticity and traceability.

Thermal Management Selection Notes

Select this component when JEDEC JC42.4 compliance is mandatory for memory modules. It is suitable for applications requiring precise thermal monitoring within the 3.0V to 3.6V operating range. Consider the available packages based on PCB space constraints. Verify that the required EEPROM capacity meets the SPD data storage needs without exceeding the 256-byte limit.

Thermal Management Part Context

This device belongs to Microchip's MCP982xx series of digital temperature sensors. It is specifically engineered for memory module applications where standard SPD data storage and thermal monitoring are required. The integration of the EEPROM eliminates the need for separate memory components, simplifying the design for DIMMs and other peripheral devices.

Thermal Management Replacement Considerations

Consult Microchip's official cross-reference documentation for verified substitute part numbers. Ensure any replacement maintains compatibility with the I²C/SMBus interface and JEDEC JC42.4 specifications. Verify that the alternative device supports the same voltage range and package options if physical interchangeability is required.

Thermal Management FAQ

How is the EEPROM write protection configured?

The lower 128 bytes can be permanently write-protected (PWP) via the A0 pin or software reversible write-protected (SWP). The upper 128 bytes remain unprotected for general-purpose data storage.

What is the function of the Event pin?

The Event pin is an open-drain output that signals when the ambient temperature exceeds user-programmable upper or lower boundary limits. It can be configured as a comparator output or an interrupt signal.