156.25 MHz HCSL for PCIe reference clocks
The DSC1124NI1-156.2500T is a MEMS-based oscillator delivering a 156.25 MHz HCSL output — the standard reference clock frequency for PCI Express Gen 1, 2, and 3 root complexes and switches. HCSL (High-Speed Current Steering Logic) provides the differential swing and common-mode levels required by PCIe without external termination resistors, saving two passives per clock pair.
Wide supply and industrial temperature range
MEMS resonator — sourcing and reliability angle
MEMS oscillators are less sensitive to mechanical shock and vibration, and their production cycle is typically shorter than quartz crystal oscillators — a practical advantage when filling a BOM line under schedule pressure. Lifecycle status is Active: the part is in production with no end-of-life notice.
6-SMD no-lead package — layout note
The 7.00 mm x 5.00 mm 6-SMD no-lead package has a 0.90 mm seated height. The no-lead footprint uses edge-castellations for solder fillet inspection; ensure the PCB land pattern matches the recommended layout in the DSC1124 datasheet to avoid skew between the differential output pair.