100 MHz HCSL MEMS oscillator — what it replaces
The HCSL (High-Speed Current Steering Logic) output is the standard clock format for PCIe reference clocks and many 100 MHz SERDES interfaces — if your receiver expects HCSL, a standard LVDS or LVPECL oscillator won't drive it without a level translator. For a system that cycles power frequently or operates in a high-vibration environment (industrial motor drives, base stations, portable instrumentation), that matters more than the frequency stability figure alone.
The supply voltage range is 2.25V to 3.6V, which covers both 2.5V and 3.3V rails without an external LDO. If your board has a 3.3V rail that dips to 2.5V during a brownout, this oscillator keeps running — no clock glitch, no PLL unlock downstream.
Microchip lists the DSC1124BI2-100.0000T as Active.
Package and enable/disable function
Housed in a 6-SMD, no-lead package measuring 5.00 mm x 3.20 mm with a seated height of 0.90 mm.