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
