The DSC1124BI5-148.3516: This is a 148.3516 MHz MEMS-based XO with HCSL output — the kind of clock you reach for when a PCIe reference or a SerDes PLL needs a clean, jitter-controlled source. No quartz crystal to crack on a drop.
HCSL output and supply range — what the downstream receiver needs
HCSL (High-Speed Current Steering Logic) is the standard output for PCIe reference clocks — the differential swing and common-mode voltage are set to drive a 50-Ω terminated line directly. If your receiver expects LVDS or LVPECL, this part won't swing the right levels without an external level translator. The supply range is 2.25 V to 3.6 V, which covers the common 2.5 V and 3.3 V rails. That 20 mA saving matters in a battery-powered design where the clock is gated between bursts.
Package and footprint — 6-SMD no-lead, 5.0 × 3.2 mm
The 6-SMD no-lead package measures 5.00 mm × 3.20 mm with a seated height of 0.90 mm — a standard footprint that matches many quartz oscillators in the same form factor. The pad layout is the same as a typical 5.0 × 3.2 mm XO; if you're swapping a quartz part in this package, the PCB doesn't need a spin.