25AA640 - 64K SPI Bus Serial EEPROM
The Microchip Technology Inc.
25AA640/25LC640 (25XX640 *) is a 64K bit Serial Electrically Erasable PROM [EEPROM].
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
25AA640 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: 5 ms max.
* Self-timed ERASE and WRITE cycles
* Block write protec
