What the key ratings mean for your clock tree
The DSC6121CI2A-00EVT: Supply current max is 3 mA typical — low enough that the XO's draw is negligible in a battery-powered design; the 1.71V minimum supply also allows the oscillator to stay alive in a 1.8V core domain without a level shift.
Obsolete — sourcing through independent channels
Microchip lists the DSC6121CI2A-00EVT as Obsolete. The part is available through independent surplus and broker inventory — lot-specific, date-code confirmed at RFQ, with counterfeit screening on the MEMS die and package marking.