Obsolete — last-time-buy window closed
The DSC6121CI2A-00AHT: This part is no longer available through the standard Microchip supply channel.
Dual-frequency MEMS XO in 4-VDFN
It delivers two independent output frequencies — 50 MHz and 100 MHz — from a single device, selected via a logic pin. The CMOS output swings rail-to-rail across the full supply range, which means a single oscillator can clock two different-speed domains on the same board without a second crystal or PLL. For a 100 MHz clock, ±25 ppm translates to ±2.5 kHz absolute error — tight enough for most Ethernet, USB, and serial-interface timing budgets without external trimming.
Power budget and package footprint
Maximum supply current is 3 mA typical. At 3.3 V, that is under 10 mW total for both output clocks — negligible in a battery-powered or thermally constrained design.
Sourcing for BOM lines with this order code
Because the DSC6121CI2A-00AHT is obsolete and no pin-compatible successor is listed, the only supply path is through independent surplus inventory. Each lot is verified for authenticity and date-code traceability before quoting.