CDCV857 is a 2.5V phase-locked loop (PLL) clock driver from TI, which is used for double data rate synchronous DRAM applications. The device adopts low-power design, and has low jitter, low skew, zero delay and other characteristics. Its working frequency range is 60MHz to 200MHz, and it can drive 10 differential clock outputs. When the input clock frequency is lower than 20MHz, the device will enter low power mode, and shut down the PLL.