AEC-Q100 1Kbit EEPROM for the automotive BOM
The ROHM BR93A46RFJ-WME2 is a 1Kbit serial EEPROM organized as 64 x 16 bits, using the Microwire interface at a 2 MHz clock rate. It is qualified to AEC-Q100, which means it passes the stress tests required for automotive-grade components — the same qualification that lets it sit on a BOM for an ECU, a transmission controller, or a battery-management module without a separate PPAP waiver. The 8-SOP-J package (a 150-mil SOIC footprint) is a standard surface-mount form factor that reflows on the same profile as the rest of the board.
Temperature grade — 105°C ceiling, not 85°C
That 105°C upper limit is the difference between a part that lives in the passenger cabin and one that survives on an engine-mounted module or inside a headlamp assembly. The 5 ms write-cycle time per word or page is consistent across the full temperature range — no derating on the write timing at high temp.
For the procurement desk, that translates to a stable supply channel — no need to stockpile or scramble for a replacement mid-production run.