What the 942 MHz ceiling means for your line rate
The AD9554-1BCPZ-REEL7 integrates a PLL that synthesises clocks up to 942 MHz — that covers OC-192 SONET/SDH line rates and 10GbE reference frequencies without an external VCO or SAW filter. The 4:4 input-to-output ratio lets you feed four independent clock domains from four reference sources, all differential, which keeps jitter low enough for Stratum 3 holdover.
Input and output signal types — matching your backplane
Inputs accept CMOS or LVDS; outputs swing HCSL, LVDS, or LVPECL. If your board already runs LVDS on the backplane, you can feed the AD9554-1BCPZ-REEL7 directly without level shifters. The HCSL output option is useful for PCIe reference clocks — the 0.7 V swing keeps EMI under control in dense routing.
Supply rail tolerance and decoupling strategy
The supply range spans 1.4V to 2.625V — a single 1.8V or 2.5V rail works.