55xS Low Skew 1 to 4 Clock Buffers Renesas Electronics 55xS Low Skew 1 to 4 Clock Buffers are low skew, a single high-speed input to four output clock buffers. These devices feature an additive phase jitter of sub 50fs and input/output clock frequency up to 200MHz, making them ideal for networking clocks. Renesas Electronics 55xS Low Skew 1 to 4 Clock Buffers are offered in an 8-pin SOIC or 8-pin DFN package and have an extended temperature range of -40°C to +105°C.