The MCP9843/98243 digital temperature sensors from Microchip Technology Inc. convert temperature from -40°C to +125°C into a digital word. These sensors meet JEDEC Specification JC42.4-TSE3000B3 and JC42.4-TSE2002B3 Memory Module Thermal Sensor Component. They provide an accuracy of ±0.2°C/±1°C (typical/maximum) from +75°C to +95°C. Additionally, the MCP98243 has an internal 256 Byte EEPROM which can be used for data storage.
The MCP9843 and MCP98243 are JEDEC‑compliant memory‑module temperature sensors that provide digital temperature conversion over a –40 °C to +125 °C range. The MCP98243 adds a 2 Kbit serial EEPROM for storing vendor and module information. Both devices use a standard 2‑wire I²C/SMBus interface and support up to eight devices on a single bus.
The document lists electrical specifications, package options (DFN‑8, TDFN‑8, UDFN‑8, TSSOP‑8), timing parameters for the I²C bus, and detailed performance curves. It also includes information on write‑protect features, EEPROM endurance, and mechanical dimensions for the various package types.
| Operating Voltage Range (Temperature Sensor) | 2.7 V – 5.5 V |
|---|---|
| Operating Voltage Range (EEPROM) | 1.8 V – 5.5 V |
| Temperature Accuracy (Grade B, +75 °C – +95 °C) | ±0.2 °C (typ.) / ±1 °C (max) |
| I²C Bus Maximum Frequency | 400 kHz |
| Package Types | DFN‑8, TDFN‑8, UDFN‑8, TSSOP‑8 |
| EEPROM Write Current | 1.1 mA typical for 3.5 ms |
The temperature sensor operates from 2.7 V to 5.5 V.
The device supports up to 400 kHz I²C/SMBus clock frequency.
The parts are offered in DFN‑8, TDFN‑8, UDFN‑8, and TSSOP‑8 packages.