A 1Kbit EEPROM you can swap in a parking lot
The Microchip 93C46B/P is a 1Kbit serial EEPROM with a Microwire interface, organized as 64 x 16 bits. The 8-DIP through-hole package is socket-friendly — no hot air, no reflow profile, just a PLCC extractor or a gentle pry. That makes it a solid choice for field repairs, legacy board bring-up, or any BOM where you want to keep the memory socketable.
Write cycle timing and endurance context
That is typical for a serial EEPROM of this generation — fast enough for configuration storage and calibration constants, but not for streaming writes. For high-frequency logging, you would want a FRAM or a larger serial Flash. The 1Kbit density holds about 128 bytes of user data; plan your memory map accordingly.