Description
Microchip Technology Inc.’s MCP98242 digital temperature sensor converts temperature from -40°C and +125°C to a digital word. This sensor meets JEDEC Specification JC42.4 Mobile Platform Memory Module Thermal Sensor Component. It provides an accuracy of ±0.5°C/±1°C (typical/maximum) 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.

FEATUREs
• Temperature Sensor + 256 Byte Serial EEPROM
• EEPROM for Serial Presence Detect (SPD)
• Optimized for Voltage Range: 3.0V to 3.6V
• Shutdown/Standby Current: 3 µA (maximum)
• 2-wire Interface: I2C™/SMBus™-Compatible
• Available Packages: DFN-8, TDFN-8, TSSOP-8

Temperature Sensor Features
• Temperature-to-Digital Converter
• Operating Current: 200 µA (typical)
• Accuracy:
   - ±0.5°C/±1°C (typ./max.) → +75°C to +95°C
   - ±1°C/±2°C (typ./max.) → +40°C to +125°C
   - ±2°C/±3°C (typ./max.) → -20°C to +125°C

Serial EEPROM Features
• Operating Current:
   - Write → 1.1 mA (typical) for 3.5 ms (typical)
   - Read → 100 µA (typical)
• Permanent and Reversible Software Write Protect
• Software Write Protection for the lower 128 bytes
• Organized as 1 block of 256 bytes (256x8)

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