The DSC1001CE2-148.3516 is a MEMS-based standard oscillator (XO) delivering a 148.3516 MHz CMOS output. That frequency is uncommon — it likely targets a specific SerDes reference or FPGA transceiver rate where a standard 125/156.25 MHz won't hit the line rate. The MEMS resonator avoids the quartz startup and aging quirks of a crystal; it's ready at power-on with no warm-up drift.
At 148 MHz the max supply current is 8.7 mA — low enough that a 100 mA LDO can power the oscillator plus a handful of logic loads. Standby mode drops the current to 15 µA via the power-down function, useful for battery-backed RTC or sleep-state keep-alive.
Housed in a 4-SMD no-lead package measuring 3.20mm x 2.50mm with a seated height of 0.90mm. No thermal pad to worry about; the package dissipates through the PCB copper.
Microchip continues to produce the DSC1001 family. No pin-compatible second source is documented, but the DSC1001 series shares the same footprint across frequencies, so a frequency variant swap is a BOM change, not a board spin.