MCP98242T-BE/MUY

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 (typ./max.) from +40°C to +125°C. Shutdown current is maximized at 3 µA.

Thermal Management Feature Summary

• Integrated 256-byte Serial EEPROM optimized for DIMM Serial Presence Detect (SPD) applications
• User-programmable registers for configurable shutdown modes and temperature event boundaries
• Open-drain Event output configurable as comparator or interrupt signal
• Permanent and reversible software write-protect capabilities for memory data security

Thermal Management Applications

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

Thermal Management Procurement Notes

Verify the specific package suffix in the ordering code against the datasheet table to ensure correct physical footprint compatibility. Confirm that the device revision matches system requirements. Ensure supply voltage remains strictly within the 3.0V to 3.6V operating range to maintain specified electrical characteristics and prevent damage.

Thermal Management Selection Notes

Select this component when JEDEC JC42.4 compliance is required for mobile platform memory modules. Choose based on the need for combined thermal sensing and SPD storage in a single 8-pin package. Consider the low shutdown current for power-sensitive applications. Verify address pin configurations allow for multiple devices on the same serial bus if necessary.

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 space constraints and standard compliance are critical. The integration of SPD storage eliminates the need for separate EEPROM components, simplifying PCB layout and reducing bill of materials for DRAM manufacturers.

Thermal Management Replacement Considerations

Check for MCP98242T-E/MUY or other package variants within the same family. Verify functional equivalence regarding JEDEC compliance and EEPROM capacity before substitution.

Thermal Management FAQ

How is the lower portion of the EEPROM protected?

The lower 128 bytes can be permanently write-protected (PWP) or software reversible write-protected (SWP) to secure vendor information.

What happens if the SCL line is held low indefinitely?

The temperature sensor resets its serial interface after the timeout period, but the EEPROM does not reset, allowing continued access to memory data.