156.25 MHz HCSL reference clock — MEMS, not quartz
The DSC1124BE1-156.2500 is a MEMS-based XO (Standard) delivering a 156.25 MHz HCSL output — the exact frequency used as the reference clock for 10GbE, PCIe Gen 3, and SATA interfaces. Output is HCSL (High-Speed Current Steering Logic), the differential standard preferred for PCIe and Ethernet PHY reference clocks. The supply voltage spans 2.25 V to 3.6 V, covering 2.5 V and 3.3 V rails without a separate regulator.
Frequency stability and temperature range
That is tight enough for most 10GbE and PCIe applications — the PHY's jitter tolerance will be the deciding factor, not the oscillator's ppm budget. The operating range suits indoor networking, telecom central-office, and office equipment; not rated for -40°C industrial or automotive environments.
The 6-SMD no-lead package (5.00 mm × 3.20 mm footprint, 0.90 mm seated height) is a standard MEMS oscillator land pattern, shared across the DSC1124 series.
Supply current is 42 mA max when active, dropping to 22 mA max when disabled, so the oscillator itself draws meaningful current even in disable; a load switch on the supply rail would cut it further if every milliwatt matters.