The AT34C02D-SSHM-B is a 2Kbit serial EEPROM from Microchip Technology, organized as 256 x 8 bits and accessed via an I2C interface at clock frequencies up to 1 MHz. The write cycle time for a word or page is 5 ms, matching the standard timing for this density class.
The SOIC-8 footprint is a standard JEDEC outline, so the PCB land pattern is shared with many other 8-pin serial EEPROMs — no custom pad geometry required.
