Description
Microchip Technology Inc.’s MCP98244 digital temperature sensor converts temperature from -40°C and +125°C to a digital word. This sensor meets JEDEC Specification JC42.4-TSE3000B1 Memory Module Thermal Sensor Component. It provides an accuracy of ±0.2°C/±1°C (typical/maximum) from +75°C to +95°C with an operating voltage of 1.7V to 3.6V. In addition, MCP98244 has an integrated EEPROM with two banks of 256 by 8 bit EEPROM (4k Bit) which can be used to store memory module details and vendor information.

FEATUREs
• Meets JEDEC Specification
   - MCP98244 --> JC42.4-TSE2004B1
      Temperature Sensor with 4 Kbit Serial
      EEPROM for Serial Presence Detect (SPD)
• 1MHz, 2-wire I2C™ Interface
• Specified VDD Range: 1.7V to 3.6V
• Operating Current: 100 µA (typ., EEPROM Idle)
• Available Package: TDFN-8

Temperature Sensor Features
• Temperature-to-Digital Converter (°C)
• Sensor Accuracy (Grade B):
   - ±0.2°C/±1°C (typ./max.)  +75°C to +95°C
   - ±0.5°C/±2°C (typ./max.)  +40°C to +125°C
   - ±1°C/±3°C (typ./max.)  -40°C to +125°C

Serial EEPROM Features
• Operating Current:
   - Write -> 250 µA (typical) for 3 ms (typical)
   - Read -> 100 µA (typical)
• Reversible Software Write Protect
• Software Write Protection for each 1 Kbit Block
• Organized as two banks of 256 x 8-bit (2 Kbit x 2)

Typical Applications
• DIMM Modules for Servers, PCs, and Laptops
• Temperature Sensing for Solid State Drive (SSD)
• General Purpose Temperature Datalog