485 kHz MEMS oscillator with AEC-Q100 — what the ratings mean for the BOM
The DSC6101JE3B-485K000: That 485 kHz sits well below the MHz range most oscillators target — it's a deliberate choice for low-speed clock domains: CAN transceiver reference, LIN bus timing, RTC calibration, or a sleep-mode watchdog clock where a quartz crystal's fundamental resonance would be oversized. The AEC-Q100 mark here certifies the MEMS die and package reliability, not the ambient temperature envelope — so this part fits cabin or infotainment zones, not an under-hood ECU that sees 105°C.
For a battery-backed module that sleeps 99% of the time, that standby power saving matters more than the active draw.