The ICS8624 is a high performance, 1-to-5 Differential-to-HSTL zero delay buffer and HiPerClockSTM a member of the HiPerClockSTM family of High Performance Clock Solutions from ICS. The ICS8624 has two selectable clock input pairs. The CLK0, nCLK0 and CLK1, nCLK1 pair can accept most standard differential input levels. The VCO operates at a frequency range of 250MHz to 700MHz. Utilizing one of the outputs as feedback to the PLL, output frequencies up to 700MHz can be regenerated with zero delay with respect to the input. Dual reference clock inputs support redundant clock or multiple reference applications.