The Renesas Electronics 553S is a low skew, single input to four output, LVCMOS clock buffer. The 553S has best in class additive phase Jitter of sub 50 fsec.

Low additive phase jitter RMS: 50 fs
Extremely low skew outputs (50 ps)
Low cost clock buffer
Packaged in 8-pin SOIC and small 8-pin DFN package, Pb-free
Input / Output clock frequency up to 200 MHz
Ideal for networking clocks
Operating Voltages: 1.8 V to 3.3 V
Output Enable mode tri-states outputs
Advanced, low power CMOS process
Extended temperature range (-40°C to +105°C)