25CS320T-E/MS

Overview

The Microchip Technology 25CS320T-E/MS is a 32-Kbit (4,096 x 8 bit) Serial EEPROM utilizing the SPI compatible bus. It operates within a voltage range of 1.7V to 5.5V and supports clock frequencies up to 20 MHz at VCC ≥ 4.5V. The device features a Security Register with a preprogrammed 128-bit serial number and user-programmable ID page. Built-in ECC logic corrects single-bit errors per four-byte readout. It includes enhanced write protection via memory partitions and UVLO detection. The component is housed in an 8-lead MSOP package and is qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Integrated Error Correction Code (ECC) logic for increased data reliability
• Configurable Enhanced Write Protection Mode with independent memory partitions
• Preprogrammed 128-bit globally unique serial number in Security Register
• AEC-Q100 Automotive Qualified for high-reliability environments

Applications

• Automotive electronic systems requiring reliable nonvolatile storage
• Industrial applications needing dependable data retention
• Consumer electronics requiring serialization and security features

Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging configuration. Confirm the 'E' designation corresponds to the Extended temperature range (-40°C to +125°C). Ensure compatibility with existing SPI host controllers supporting Modes 0 and 3. Cross-reference the datasheet revision DS20006923B for accurate electrical characteristics and timing parameters before finalizing procurement.

Selection Notes

Select this component when backward compatibility with 25AA320A/25LC320A or AT25320B devices is required. Choose this part for designs necessitating hardware-level security through the dedicated Security Register and unique serial numbering. It is suitable for applications demanding high-speed SPI communication up to 20 MHz and robust write protection schemes beyond standard block protection.

Part Context

This device belongs to the 25CS series of Serial EEPROMs from Microchip Technology. It shares architectural similarities with other 32-Kbit SPI EEPROMs but distinguishes itself through integrated ECC and advanced partition-based write protection. The T/E/MS suffix combination specifies the Tape & Reel packaging, Extended temperature rating, and MSOP-8 form factor respectively.

Replacement Considerations

The datasheet explicitly states backward compatibility with the 25AA320A, 25LC320A, and AT25320B. These parts may serve as functional substitutes if pin-out and instruction set compatibility are verified. Ensure that the replacement part meets the same voltage and temperature requirements.