The Microchip AT24MAC602-XHM-B is a 2Kbit serial EEPROM with an I2C interface, organized as 256 x 8 bits. Its 550 ns access time sets the read-cycle window: after the address is clocked in, the first data byte is available on the SDA line within 550 ns. For a 1 MHz bus (Fast Mode Plus), that leaves roughly 450 ns of setup margin before the next SCL rising edge — comfortable for most MCU I2C peripherals, but worth checking if the master has a tight SDA hold-time spec. The 1 MHz clock frequency is the maximum bus speed; the part also works at 400 kHz and 100 kHz without any configuration change.
Write cycle time and endurance
The write cycle time is 5 ms per word or page. For a 2Kbit device, a full-chip rewrite (256 bytes) takes 256 × 5 ms if written byte-by-byte, or about 5 ms if the master uses page writes (the page size is not explicitly stated, but the 256 x 8 organization implies a single page).
Lifecycle and sourcing posture
Microchip lists the AT24MAC602-XHM-B as Active.