MCP98243T-BE/MCAB

Overview

The MCP98243T-BE/MCAB is a digital temperature sensor with an integrated 2 Kbit Serial EEPROM for SPD. It operates within a -40°C to +125°C range and meets JEDEC JC42.4-TSE2002B3 specifications. The device features Grade B accuracy of ±0.2°C typical/±1°C maximum from +75°C to +95°C, and ±1°C typical/±3°C maximum from -20°C to +125°C. It utilizes a 2-wire I²C/SMBus interface and supports a specified VDD range of 3.0V to 3.6V for the sensor and 1.8V to 5.5V for the EEPROM.

Feature Summary

• Integrated 2 Kbit Serial EEPROM designed for DRAM DIMM Serial Presence Detect (SPD) applications
• User-programmable registers enabling configurable shutdown modes and temperature event boundaries
• Open-drain Event output supporting active-low or active-high configurations for thermostat or interrupt operations
• Permanent and reversible software write protection mechanisms for secure data storage

Applications

• DIMM Modules for Servers, PCs, and Laptops
• General Purpose Temperature Datalogging
• Memory Module Thermal Sensor Component Applications

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and tape-and-reel configuration. Ensure compatibility with JEDEC JC42.4-TSE2002B3 standards if used in memory modules. Confirm voltage requirements match system design constraints for both sensor and EEPROM sections.

Selection Notes

Select this component when SPD functionality is required alongside high-accuracy thermal monitoring. The MCP98243 offers superior I²C bus frequency support compared to predecessors like the MCP98242. Consider the exposed thermal pad for improved heat dissipation in dense PCB layouts requiring efficient thermal management.

Part Context

This part belongs to the MCP9843/98243 family of digital temperature sensors manufactured by Microchip Technology. It shares architectural similarities with the MCP9843 but includes additional EEPROM capabilities specifically tailored for memory module identification and data storage needs in computing environments.

Replacement Considerations

The MCP98242 serves as a functional predecessor lacking EEPROM. Verify I²C timeout ranges and bus frequency limits when substituting between these models to ensure protocol compatibility.