25C640 Datasheet - MicrochipTechnology

25C640 64K SPI Bus Serial EEPROM

The Microchip Technology Inc. 25AA640/25LC640/ 25C640 (25xx640 *) is a 64K bit serial Electrically Erasable PROM. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (.

25C640 Features

* Low power CMOS technology - Write current: 3 mA typical - Read current: 500 µA typical - Standby current: 500 nA typical

* 8192 x 8 bit organization

* 32 byte page

* Write cycle time: 5ms max.

* Self-timed ERASE and WRITE cycles

* Block write protect

25C640_MicrochipTechnology.pdf