Why this MEMS oscillator survives where quartz cracks
The Microchip DSC1121DM2-024.0000 is a MEMS-based XO (Standard) that delivers a 24 MHz CMOS clock from -55°C to 125°C — the full military temperature band — while carrying AEC-Q100 automotive qualification. That combination means one BOM line covers an engine-bay ECU that sees 105°C ambient and a satellite payload that cycles through -55°C on orbit, without swapping parts or derating. This part eliminates that failure path without a separate holder or conformal-coat workaround.
Supply voltage flexibility and output drive
The 2.25V to 3.6V supply range lets the DSC1121DM2-024.0000 run directly off a 2.5V or 3.3V rail — no extra LDO for the oscillator. In a battery-powered design, that 22 mA standby draw means you should gate the oscillator at the supply, not rely solely on the enable pin, to reach microamp sleep targets.
The 6-SMD No Lead package measures 2.50mm x 2.00mm with a seated height of 0.90mm max — a compact footprint that fits tight PCIe card or sensor-module layouts. The no-lead design means the terminations are flush with the package edge; the PCB land pattern should use a 0.50mm pad pitch with a 0.30mm solder-mask opening to avoid bridging during reflow. Surface-mount assembly on a standard FR-4 board with a 0.8mm to 1.6mm thickness is fine. The package is moisture sensitivity level 1 per JEDEC, so no bake-out is required before reflow if stored in a dry environment.