2 Kbit Microwire EEPROM — bus timing and supply headroom
The 93AA56AT-I/SN is a 2 Kbit serial EEPROM from Microchip Technology using the Microwire interface, organized as 256 x 8 bits. Clock frequency is 2 MHz, and the write cycle time per word or page is 6 ms — the limiting factor for firmware update throughput is this write time, not the bus clock.
Product status is Active, meaning Microchip Technology continues to manufacture and support this part for new designs. ROHS3 compliant, so it meets the current EU restriction on hazardous substances without exemption.