FM25C640U

The FM25C640U is a 64K bit serial interface CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory). FM25C640U fully conforms to the SPI 4-wire protocol which uses Chip Select (/CS), Clock (SCK), Data-in (SI) and Data-out (SO) pins to synchronously control data transfer between the SPI microcontroller and the EEPROM. In addition, the serial interface allows a minimal pin count, packaging designed to simplify PC board layout requirements and offers the designer a variety of low voltage and low power options.

This SPI EEPROM FM25C640U family is designed to work with the 68HC11 or any other SPI-compatible, high-speed microcontroller and offers both hardware (/WP pin) and software ("block write") data protection.For example, entering a 2-bit code into the STATUS REGISTER prevents programming in a selected block of memory and all programming can be inhibited by connecting the /WP pin to VSS;allowing the user to protect the entire array or a selected section.In addition, SPI FM25C640U feature a /HOLD pin, which allows a temporary interruption of the datastream into the EEPROM.

Fairchild EEPROMs FM25C640U are designed and tested for applications requiring high endurance, high reliability, and low power consumption for a continuously reliable non-volatile solution for all markets.