The DSC1121NI2-125.0000 is an active-production XO (Standard) MEMS oscillator from Microchip, delivering a 125 MHz CMOS output across a 2.25V to 3.6V supply range. AEC-Q100 rated, it is qualified for automotive environments spanning -40°C to 85°C — suitable for under-hood ECUs, ADAS reference clocks, and infotainment modules where quartz oscillators may not survive the vibration profile.
CMOS output and a supply range of 2.25V to 3.6V mean this oscillator can be powered from a 2.5V or 3.3V rail directly — no extra level translator needed for the clock line. Frequency stability is ±25ppm, tight enough for 125 MHz Ethernet PHY reference clocks or FPGA transceiver PLLs without external trimming.
6-SMD no-lead — layout footprint and rework considerations
Housed in a 6-SMD, No Lead package measuring 7.00 mm x 5.00 mm with a seated height of 0.90 mm, the footprint is standard for this form factor and matches many 7x5 mm MEMS oscillator pads. Surface-mount assembly with no leads means the part is self-aligning during reflow; the package outline is large enough that orientation marking is clear under a loupe — no lab bench needed to confirm placement.