Memory Module Temperature Sensor W/ EEPROM For SPD

Microchip Technology Inc.’s MCP98243 digital Temperature Sensor converts temperature from -40°C and +125°C to a digital word. This Sensor meets JEDEC Specification JC42.4-TSE2002B3 Platform Memory Module Thermal Sensor Component. It provides an accuracy of ±0.2°C/±1°C (typical/maxi- mum) from +75°C to +95°C. In addition, this device has an internal 256 Byte EEPROM which CAN be used to store memory module and vendor information. The MCP98243 digital Temperature Sensor comes with user-programmable Registers that provide flexibility for DIMM temperature-sensing applications. The Registers allow user-selectable settings such as Shutdown or Low-Power modes and the specification of temperature Event boundaries. When the temperature changes beyond the specified Event boundary limits, the MCP98243 outputs an Alert signal at the Event pin. The user has the option of setting the temperature Event output signal polarity as either an active-low or active-high Comparator output for thermostat operation, or as a temperature Event interrupt output for micropro- cessor-based systems. By Microchip Technology Inc.