MCP9843-BE/ST

Thermal Management Overview

The MCP9843-BE/ST is a digital temperature sensor manufactured by Microchip Technology, housed in an 8-pin TSSOP package. It features a 2-wire I²C/SMBus interface and meets the JEDEC JC42.4-TSE3000B3 specification. The device operates within a voltage range of 2.7V to 5.5V, with a specified range of 3.0V to 3.6V. It provides accuracy of ±1°C (max) from -20°C to +125°C and ±0.2°C (typ) from +75°C to +95°C. The operating temperature range spans from -40°C to +125°C.

Thermal Management Feature Summary

• Complies with JEDEC JC42.4-TSE3000B3 Memory Module Thermal Sensor Component specifications.
• Features user-programmable registers for configurable shutdown modes and temperature event boundaries.
• Provides an open-drain Event output pin that signals when ambient temperature exceeds defined limits.
• Supports up to eight devices on a single serial bus via standard I²C protocol.

Thermal Management Applications

• DIMM modules for servers, PCs, and laptops
• General purpose temperature datalogging

Thermal Management Procurement Notes

Verify the specific suffix BE/ST corresponds to the TSSOP-8 package variant. Confirm the Grade B accuracy requirements align with the application's thermal constraints. Ensure the host controller supports the required I²C timing parameters and pull-up configurations for reliable communication.

Thermal Management Selection Notes

Select this component for applications requiring JEDEC compliance and high accuracy near room temperature. Consider the TSSOP-8 package for surface-mount assembly needs. Evaluate the power supply stability, as the specified range is 3.0V to 3.6V for optimal performance, though it operates from 2.7V to 5.5V.

Thermal Management Part Context

This part belongs to the MCP9843/98243 family of digital temperature sensors. While the MCP98243 includes integrated EEPROM for Serial Presence Detect (SPD), the MCP9843 focuses solely on temperature sensing without memory storage capabilities. Both share identical thermal sensing architectures and interface protocols.

Thermal Management Replacement Considerations

The MCP98243 serves as a functional substitute if SPD memory integration is required, sharing the same thermal characteristics and package options.