Description
Microchip Technology Inc.’s MCP9843/98243 digital temperature sensors convert temperature from -40°C and +125°C to a digital word. These sensors meet JEDEC Specification JC42.4-TSE3000B3 and JC42.4-TSE2002B3 Memory Module Thermal Sensor Component. It provides an accuracy of ±0.2°C/±1°C (typical/maximum) from +75°C to +95°C. In addition, MCP98243 has an internal 256 Byte EEPROM which can be used to store memory module and vendor information.

FEATUREs
• Meets JEDEC Specification
   - MCP9843 - JC42.4-TSE3000B3
      Temperature Sensor
   - MCP98243 --> JC42.4-TSE2002B3
      Temperature Sensor with 2 Kbit Serial
      EEPROM for Serial Presence Detect (SPD)
• 2-wire I2C™/SMBus Interface
• Available Packages:
   - DFN-8, TDFN-8, UDFN-8, TSSOP-8

Temperature Sensor Features
• Temperature-to-Digital Converter
• 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.) → -20°C to +125°C
• Specified VDD Range: 3.0V to 3.6V
• Operating Current: 200 µA (typical)
• Operating VDD Range: 2.7V to 5.5V

Serial EEPROM Features (MCP98243)
• Specified VDD Range: 1.8V to 5.5V
• 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 1 Kbit
• Organized as 1 block of 256 x 8-bit (2 Kbit)

Typical Applications
• DIMM Modules for Servers, PCs, and Laptops
• General Purpose Temperature Datalog