125 MHz MEMS XO with military temperature range
The DSC1121BM1-125.0000 is a 125 MHz MEMS-based XO (standard oscillator) from Microchip's DSC1121 series, delivering a CMOS output with ±50 ppm frequency stability across the full -55°C to +125°C military temperature range. Procurement teams for Tier-1 automotive or high-reliability industrial programs can treat this as a qualified drop-in without an additional PPAP review cycle. The MEMS resonator eliminates quartz start-up delay and offers superior shock/vibration tolerance — the output is stable within microseconds of power-up, and the part holds frequency through mechanical shock events that would cause a quartz oscillator to glitch.
Housed in a 6-VDFN package measuring 5.00 mm × 3.20 mm with a seated height of 0.90 mm, this is a standard 5.0×3.2 mm oscillator footprint. The Enable/Disable function is typically on pin 1 — when pulled low, the output goes to high-impedance and the current drops to 22 mA. Leave pin 1 floating or tie it high for normal operation.
For volume requirements, confirm reel or tape-and-reel availability at quote time — the base product number DSC1121 may have alternative packaging suffixes.