1.2 GHz PLL clock generator — what it does on the board
The CDCE421RGER is a single-circuit PLL-based clock generator from Texas Instruments, producing a clean differential output up to 1.2 GHz from a lower-frequency LVCMOS or crystal input. It outputs LVDS or LVPECL — the two most common differential signalling standards for high-speed serial links — so it can drive the reference clock on an FPGA, SERDES, or ADC directly without an external translator.
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