Microchip AT25640B-XHL-B, 64kB EEPROM Chip, 80ns 8-Pin SOP Serial-SPI

The Microchip 32,768-/65,536-bits of serial electrically erasable programmable read only memory (EEPROM) organized as 4,096/8,192 words of 8 bits each. The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential. It is available in space saving 8-lead TSSOP package.

Serial peripheral interface (SPI) compatible
Supports SPI modes 0 (0,0) and 3 (1,1)
32-byte page mode
Block write protection
̶Protect 1/4, 1/2, or entire array
Write Protect (WP) pin and write disable instructions for both hardware and software data protection
Self-timed write cycle 5 ms maximum
High reliability
̶Endurance 1,000,000 write cycles
̶Data retention 100 years