Dual-frequency MEMS XO — 75 MHz and 100 MHz on one die
The DSC6121CI2A-00ET: The dual-output architecture lets a single oscillator clock two different rails on the same board — a 75 MHz Ethernet MAC and a 100 MHz processor core, for example — without a second can or a PLL multiplying up from a single reference.
Supply and stability — wide voltage, tight ppm
Typical supply current is 3 mA — low enough that the oscillator's contribution to the board thermal budget is negligible, even in a dense multi-rail design.
Lifecycle — obsolete, no direct successor
A board spin to a current DSC61XX variant or a different MEMS oscillator family may be the longer-term path.