The Cypress CY7B994V-5BBI is a multi-phase PLL clock buffer from the RoboClock series, designed to take one of four input clock sources and distribute up to eighteen LVTTL outputs with programmable skew and phase adjustment. It integrates a PLL for zero-delay or frequency-multiplied clock trees, and the 4:18 fanout ratio means a single chip can feed an entire synchronous bus without external fanout buffers. Typical applications include telecom line cards, networking switches, and industrial controller backplanes where multiple clock domains need phase-aligned distribution across a PCB.
The 200 MHz maximum frequency sets the upper bound for the clock tree. The 4:18 input-to-output ratio is the headline fanout spec.
For production BOMs, this removes the sourcing risk of an obsolete clock chip mid-program.