Dual HCSL outputs for PCIe and Ethernet reference clocks
The DSC2044FI1-H0001T delivers two independent HCSL outputs from a single MEMS resonator — Output 1 selects among 100, 106.25, 125, or 156.25 MHz; Output 2 selects among 25, 50, 100, 125, or 156.25 MHz. HCSL (High-Speed Current Steering Logic) is the standard clock format for PCIe Gen1/2/3, 1000BASE-T Ethernet, and SATA interfaces — the 100 MHz and 125 MHz rates on both outputs cover the most common reference frequencies used in networking and computing platforms.
The MEMS resonator construction avoids the quartz supply chain constraints that periodically affect traditional crystal oscillators — the base resonator is MEMS, and the device is assembled in a standard 14-VFQFN exposed-pad package.