MCP98244T-BE/MNYAB

Thermal Management Overview

The MCP98244T-BE/MNYAB is a digital temperature sensor with integrated 4 Kbit Serial EEPROM for SPD, manufactured by Microchip Technology. It operates within a voltage range of 1.7V to 3.6V and features a 1MHz I²C interface. The device meets JEDEC JC42.4-TSE2004B1 specifications. Temperature accuracy is ±0.2°C/±1°C (typ./max.) from +75°C to +95°C, ±0.5°C/±2°C from +40°C to +125°C, and ±1°C/±3°C from -40°C to +125°C. It is housed in an 8-pin TDFN package.

Thermal Management Feature Summary

• Integrated 4 Kbit EEPROM organized into two banks of 256 x 8-bit for storing memory module details and vendor information.
• User-programmable registers allow configuration of Shutdown or Low-Power modes and specification of temperature Event boundaries.
• Open-drain Event output pin provides configurable active-low or active-high signals for thermostat operation or microprocessor interrupts.
• Compliant with JEDEC Specification JC42.4-TSE2004B1 for Memory Module Thermal Sensor Components.

Thermal Management Applications

• DIMM Modules for Servers, PCs, and Laptops
• Temperature Sensing for Solid State Drive (SSD)
• General Purpose Temperature Datalogging

Thermal Management Procurement Notes

Verify the specific suffix 'MNYAB' against official Microchip documentation to confirm exact packaging and reel specifications. Ensure compatibility with JEDEC standards if used in SPD applications. Confirm that the AEC-Q100 qualification status applies to this specific variant before integration into automotive systems.

Thermal Management Selection Notes

Select this component when precise thermal monitoring is required alongside non-volatile data storage on memory modules. The wide operating voltage range supports low-power designs. Consider the exposed thermal pad for improved heat dissipation in dense PCB layouts. Verify address pin configurations to prevent bus conflicts in multi-device environments.

Thermal Management Part Context

This part belongs to the MCP98244 family of digital temperature sensors designed specifically for DRAM DIMMs. It integrates a band-gap temperature sensor, delta-sigma ADC, and user-programmable registers. The device facilitates both thermal management and Serial Presence Detect functions through its combined sensor and EEPROM architecture.

Thermal Management Replacement Considerations

Consult Microchip's Total Endurance model for EEPROM endurance estimates. Verify electrical characteristics against similar JEDEC-compliant sensors if substituting. Ensure the replacement supports the required 1MHz I²C speed and compatible register map for seamless integration.

Thermal Management FAQ

How does the MCP98244 handle temperature event alerts?

The device outputs a signal via the open-drain Event pin when the ambient temperature exceeds user-programmed upper or lower boundary limits. The polarity can be configured as active-low or active-high.

What is the function of the A0 pin?

The A0 pin serves as a client address input bit and also accepts high voltage (VHV) to enable the EEPROM Software Write Protect feature.

Can the EEPROM write protection be reversed?

Yes, the MCP98244 features reversible software write protection for each 1 Kbit block of the EEPROM.