1Kbit EEPROM for configuration storage — what the ratings mean
The ROHM BR93L46F-WE2 is a 1Kbit serial EEPROM organized as 64 words by 16 bits, accessed over a Microwire (3-wire) interface at up to 2 MHz. It stores non-volatile parameters — calibration constants, serial numbers, trim values, or small lookup tables — in a 1.8V to 5.5V system without needing a separate supply rail. The 5ms write cycle per word or page is typical for this density; fine for infrequent writes like factory programming or field-update of a few bytes.
ROHS3 compliance is confirmed, clearing EU regulatory requirements for new builds.
Industrial temperature range — fits factory and outdoor gear
If your design needs the wider -40°C to 105°C or 125°C range, the automotive-grade BR93A46RFVT-WME2 (AEC-Q100, 2.5V min supply) is a functional alternative — same 1Kbit density and Microwire interface, but with a higher minimum supply voltage.
Microwire bus at 2 MHz — timing margin for most MCUs
The 2 MHz clock rate on the Microwire bus delivers about 250 kbit/s read throughput after overhead. That is enough for a 64-word read in under 1 ms. Most 8-bit and 32-bit MCUs with a bit-banged or SPI-configured Microwire port will meet the setup and hold times with a few hundred picoseconds of margin. The wide supply range (1.8V to 5.5V) means you can run the bus at the same voltage as the host controller — no level shifter needed.
Sourcing and supply posture
No lead-time number is published here, but the active status means factory output continues — we can quote both reel quantities (Tape & Reel) and small cut-tape volumes for prototypes or repair runs.