2 Kbit serial EEPROM for parameter storage — what the Microwire bus timing means
The Microchip 93C56C-I/ST is a 2 Kbit serial EEPROM with a Microwire interface, organized as 256 x 8 or 128 x 16 bits. It runs at a 3 MHz clock, which is the speed you need to budget for the bus cycle — at 3 MHz a 16-bit read takes about 5.3 µs plus the 2 ms write cycle for a word or page. That write time is the bottleneck if you are logging data or updating configuration at runtime; for one-time calibration or boot parameters it is invisible.
Industrial temperature range and 5 V supply — where it fits
The 5 V-only supply is an advantage in legacy 5 V buses and noisy industrial environments where a wider noise margin helps, but it locks out 3.3 V or 1.8 V logic domains without translation.