Dual-frequency MEMS XO — what the specs mean for a timing budget
The DSC6122CI2A-00AST: The dual-frequency capability eliminates a separate oscillator on the board when a system needs both a base clock and a higher-speed reference for a serial interface or PLL input.
Power budget and board-fit detail
Maximum supply current is 3 mA typical — at 3.3 V that is under 10 mW total for both outputs combined, making this oscillator suitable for power-sensitive designs where a single quartz XO plus a clock buffer would draw more. The MEMS die and the PLL are inside the same package, so the output jitter is set by the on-chip regulator, not by external supply noise coupling through the Vdd pin.
Lifecycle status and sourcing posture
For existing BOM lines that call out this exact order code, independent surplus and broker inventory is the remaining supply path.