1Kbit EEPROM with 3-wire Microwire interface
The Microchip Technology AT93C46EN-SH-B is a 1Kbit serial EEPROM organized as 64 words of 16 bits each, accessed through a 3-wire serial interface (Microwire protocol). The 2 MHz maximum clock frequency delivers a read throughput of roughly 250 kbit/s, adequate for storing configuration parameters, calibration constants, or serial numbers in embedded systems.
Housed in an 8-SOIC narrow-body package (3.90 mm width, 0.154" pitch), the footprint is a JEDEC standard shared by hundreds of EEPROM and logic parts — a single PCB land pattern covers multiple second-source options. The write cycle time of 5 ms per word or page means a full 64-word rewrite takes roughly 320 ms; budget this into the firmware update or calibration routine to avoid timing violations on the bus.
Active lifecycle and compliance status
ROHS3 compliant per the listing, meeting the EU RoHS directive's current substance restrictions without an exemption claim. Supplied in tube packaging (standard 8-SOIC tube), which is the common format for hand-loading or small-batch assembly; reel and tape options exist for the same die in the AT93C46EN-SH-T variant if automated pick-and-place volume demands it.