Dual-frequency MEMS clock source
The DSC400-0103Q0102KE1T is a MEMS-based XO (Standard) from Microchip's DSC400 series, delivering two independent output frequencies: 148.5 MHz on output 1 and 14.7456 MHz on output 2. Both outputs are configurable as LVCMOS or LVDS, giving the designer a single oscillator to drive a video clock and a serial/peripheral clock on the same device. Frequency stability is rated at ±50 ppm over the -20 to 70 °C commercial temperature range, and the supply voltage accepts 2.25 V to 3.6 V — a wide-enough window to run from a 2.5 V or 3.3 V rail without an external LDO.
Housed in a 20-VFQFN with exposed pad, measuring 5.00 mm x 3.20 mm and standing 0.90 mm tall, the DSC400-0103Q0102KE1T fits a standard QFN footprint. The exposed pad must be soldered to a thermal via array on the PCB — the datasheet's recommended land pattern (page 7) specifies a 3.2 mm x 2.2 mm pad with a 0.3 mm via grid for adequate heat transfer.