MCP98242T-BE/MC

Overview

The MCP98242T-BE/MC is a digital temperature sensor and serial EEPROM integrated circuit manufactured by Microchip Technology. It features an internal temperature sensor with ±0.5°C typical accuracy from +75°C to +95°C, operating within a -40°C to +125°C range. The device includes a 256-byte Serial Presence Detect (SPD) EEPROM for memory module data storage. It utilizes a 2-wire I²C/SMBus compatible interface and operates on a 3.0V to 3.6V supply. The component is housed in an 8-lead UDFN package measuring 2x3 mm.

Feature Summary

• Integrates a high-accuracy digital temperature sensor with user-programmable registers for boundary trip limits and event output configuration.
• Includes a 256-byte Serial EEPROM specifically designed for DRAM DIMM Serial Presence Detect applications with write-protection capabilities.
• Features a 2-wire I²C/SMBus compatible serial interface allowing multiple devices on a single bus.
• Supports shutdown mode for low-power standby operation with minimal current consumption.

Applications

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

Procurement Notes

Verify the specific suffix 'BE/MC' against official Microchip documentation to confirm the exact package type and tape-and-reel specifications. Ensure compatibility with JEDEC JC42.4 Mobile Platform Memory Module Thermal Sensor Component standards if used in memory applications. Confirm that the 3.0V to 3.6V operating voltage range aligns with the target system power rails.

Selection Notes

Select this component when a combined temperature monitoring and SPD EEPROM solution is required for memory modules. Consider the ±0.5°C accuracy specification for critical thermal management zones between +75°C and +95°C. Evaluate the 8-UDFN(2x3) package dimensions for PCB space constraints. Verify that the host controller supports the standard I²C/SMBus protocol for communication.

Part Context

The MCP98242 belongs to Microchip's family of digital temperature sensors designed for mobile platform memory modules. It complies with the JEDEC JC42.4 specification, ensuring interoperability with standard memory systems. The device integrates both sensing and non-volatile memory functions into a single compact package, simplifying board design for DIMM applications.

Replacement Considerations

Check Microchip datasheets for alternative part numbers within the MCP9824x series or other JC42.4 compliant sensors. Verify pinout compatibility and electrical specifications before substitution.

FAQ

What is the purpose of the Event output pin?

The Event output pin is an open-drain output that signals when the ambient temperature exceeds user-programmable upper or lower boundary limits or a critical temperature threshold.

How is the EEPROM write protection configured?

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