25CS640T-E/ST36KVAO

Overview

The 25CS640T-E/ST36KVAO is a 64-kbit serial electrically erasable programmable read-only memory (EEPROM) manufactured by Microchip Technology. It utilizes an SPI-compatible interface for data communication and is housed in an 8-pin Thin Shrink Small Outline Package (TSSOP). The device operates within a supply voltage range of 2.5 V to 5.5 V and supports surface-mount installation. It features integrated Error Correction Code (ECC) capabilities to enhance data integrity. The component is supplied in tape and reel packaging, designated for industrial temperature ranges up to 125°C.

Feature Summary

• Integrated Error Correction Code (ECC) functionality for improved data reliability
• SPI serial interface compatibility for standard digital communication
• Industrial temperature rating supporting operation up to 125°C

Applications

• Automotive electronic systems requiring high-temperature stability
• Industrial control units needing reliable non-volatile data storage
• Embedded devices utilizing SPI-based microcontroller architectures

Procurement Notes

Verify the specific suffix '36KVAO' against official Microchip documentation to confirm exact packaging and qualification details. Ensure the ordering quantity aligns with the tape and reel requirements specified in the manufacturer's datasheet. Cross-reference the part number with current product change notifications to verify manufacturing status and availability constraints before finalizing procurement plans.

Selection Notes

Select this component when an SPI interface is required alongside robust error correction mechanisms for critical data retention. The 64-kbit capacity suits applications storing configuration parameters or small datasets. Confirm that the system power supply remains within the 2.5 V to 5.5 V operational window and that the PCB layout accommodates the TSSOP-8 package dimensions for proper thermal and electrical performance.

Part Context

This EEPROM belongs to the 25CS series, which distinguishes itself from standard variants by including hardware-level ECC support. This series targets environments where data corruption risks are elevated, such as automotive or harsh industrial settings. The TSSOP-8 form factor provides a compact solution for space-constrained designs while maintaining the electrical characteristics necessary for high-reliability memory operations.

Replacement Considerations

Direct substitutes include other 25CS640 variants with different packaging, such as the tube-packaged 25CS640-I/ST or SOIC versions like 25CS640-E/SN. Verify that any replacement maintains the same ECC feature set and SPI timing specifications to ensure functional compatibility without circuit redesign.