5.25 MHz MEMS clock source — fit and function
The DSC1121AE5-005.2500 is a MEMS-based XO (Standard) that outputs a 5.25 MHz CMOS clock with ±10 ppm frequency stability — tighter than the ±25 ppm typical of quartz oscillators, which matters when the system clock feeds a PLL or a serial data link where jitter accumulates. The supply voltage accepts 2.25V to 3.6V, so the same BOM line works across 2.5V and 3.3V logic rails without a separate regulator or level translator.
Package, temperature grade, and board layout
The commercial temperature grade limits this part to indoor, controlled-environment equipment — not rated for industrial outdoor, under-hood, or engine-bay deployment.
No last-time-buy window, no PCN risk for obsolescence.