1 Kbit EEPROM in an 8-TSSOP — what the specs mean for your BOM
The ROHM BR93G46FVT-3AGE2 is a 1 Kbit serial EEPROM organized as 64 words by 16 bits, accessed over a Microwire (3-wire) interface at up to 3 MHz. Write-cycle time is 5 ms per word or page, typical for this density class.
Supply voltage range — 1.7V to 5.5V
The 1.7V minimum supply means this part works with a 1.8V logic rail — common in low-power MCUs and wireless SoCs — without an external boost regulator. The 5.5V top end covers 5V legacy buses. That 3.8 V span is wide enough that the same line item can serve mixed-voltage designs across different product variants, which simplifies procurement qualification.
3 MHz Microwire — bus timing and throughput
The 3 MHz clock rate on the Microwire interface gives a raw serial bit rate of 3 Mbps. For a 16-bit word, a read cycle takes roughly 5.3 µs plus the 5 ms write time. That write latency is the throughput bottleneck — the 3 MHz speed helps on read-heavy operations like calibration-table fetch or boot-code load, but write-heavy logging will be limited by the 5 ms page-write time.
For a procurement review, this part does not introduce obsolescence risk for a new design or a production build.