156.25 MHz HCSL clock — MEMS vs quartz trade-offs
The DSC1124CE1-156.2500: This is a 156.25 MHz XO (Standard) with HCSL output — a common reference frequency for PCIe Gen1/2/3 and 10GbE MAC-to-PHY interfaces. The MEMS base resonator gives it faster startup (typically under 5 ms) and higher shock resistance than a quartz crystal, which matters if the board sees vibration or portable handling.
Supply voltage flexibility and current budget
Max supply current is 42 mA when enabled, 22 mA when disabled — the disable function lets you gate the clock for power savings in multi-rail systems.
Suitable for both new designs and ongoing production. No official successor or second-source listed.
6-SMD, no-lead package, 3.20 mm x 2.50 mm footprint, seated height 0.90 mm max. Temperature range is -20°C to 70°C — commercial grade, so it fits indoor networking gear, test equipment, and office appliances, but not under-hood automotive or outdoor base stations without an enclosure.