MCP98242T-CE/MC

Thermal Management Overview

The MCP98242T-CE/MC is a digital temperature sensor and serial EEPROM integrated circuit manufactured by Microchip Technology. It operates within a voltage range of 3.0V to 3.6V and features an internal temperature sensor with accuracy of ±0.5°C typical and ±1°C maximum between +75°C and +95°C. The device includes a 256-byte Serial Presence Detect (SPD) EEPROM for memory module information storage. It utilizes a 2-wire I2C/SMBus compatible interface and provides user-programmable temperature event boundaries via an open-drain output pin.

Thermal Management Feature Summary

• Integrates a high-accuracy digital temperature sensor with a 256-byte Serial Presence Detect (SPD) EEPROM for DIMM applications
• Features a 2-wire I2C/SMBus compatible serial interface allowing multiple devices on a single bus
• Includes user-programmable registers for configurable shutdown modes, hysteresis, and critical temperature trip limits
• Provides an open-drain Event output signal that activates when ambient temperature exceeds specified boundary thresholds

Thermal Management Applications

• JEDEC-compliant DIMM modules
• Laptops and personal computers
• Server systems
• Hard disk drives and PC peripherals

Thermal Management Procurement Notes

Verify the specific package suffix matches the required form factor, as the MCP98242 family offers DFN-8, TDFN-8, UDFN-8, and TSSOP-8 options. Confirm the operating voltage requirements align with the 3.0V to 3.6V specification before integration. Ensure the design accounts for the exposed thermal pad connection to ground if using surface-mount packages with thermal pads.

Thermal Management Selection Notes

Select this component for designs requiring JEDEC JC42.4 compliance for mobile platform memory modules. It is suitable for applications needing precise thermal monitoring combined with non-volatile data storage for vendor identification. Consider the low shutdown current for power-sensitive environments and the availability of software write protection for the lower EEPROM bytes.

Thermal Management Part Context

The MCP98242 belongs to Microchip's line of digital temperature sensors designed specifically for memory module thermal management. It combines sensing capabilities with SPD functionality, distinguishing it from standard standalone sensors. The device supports industry-standard communication protocols, facilitating easy integration into existing host controller architectures without complex interface hardware.

Thermal Management Replacement Considerations

Check datasheets for alternative part numbers within the MCP9824x series or comparable JEDEC-compliant sensors from other manufacturers. Verify pinout compatibility and register mapping differences if substituting with devices offering similar EEPROM capacities and I2C interfaces.

Thermal Management FAQ

What is the function of the lower 128 bytes of the EEPROM?

The lower 128 bytes are designated for Serial Presence Detect (SPD) data and can be permanently or reversibly software write-protected to store DRAM vendor and product information.

How does the device handle temperature events?

The MCP98242 outputs a signal on the Event pin when the temperature exceeds user-programmable upper or lower boundary limits, which can be configured as either a comparator output or an interrupt.