Description:

The Microchip Technology Inc. 25AA640A/25LC640A (25XX640A*) are 64 kbit Serial Electrically Erasable PROMs. 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 (SO) lines. Access to the device is controlled through a Chip Select (CS) input.

Features:

? Max. Clock 10 MHz

? Low-Power CMOS Technology:

- Max. Write Current: 5 mA at 5.5V, 10 MHz

- Read Current: 5 mA at 5.5V, 10 MHz

- Standby Current: 1 μA at 5.5V

? 8192 x 8-bit Organization

? 32 Byte Page

? Self-Timed Erase and Write Cycles (5 ms max.)

? Block Write Protection:

- Protect none, 1/4, 1/2 or all of array

? Built-In Write Protection:

- Power-on/off data protection circuitry

- Write enable latch

- Write-protect pin

? Sequential Read

? High Reliability:

- Endurance: 1,000,000 erase/write cycles

- Data retention: > 200 years

- ESD protection: > 4000V

? Temperature Ranges Supported:

- Industrial (I): -40°C to +85°C

- Automotive (E): -40°C to +125°C