Synchronous Ethernet makes it possible to connect synchronous (SONET) and asynchronous (Ethernet) networks using point-to-point connections. For it to work, however, the elimination of jitter is critical. The VFJA434 is a Jitter Attenuator configured with 4 LVCMOS output ports up to 200MHz. RMS Jitter from 12KHz to 20MHz is ultra low at 0.18ps. Two select inputs allow the user to select one of four preset input frequencies. A lock detect signal indicates when the output signal is frequency locked to the input. The VFJA434 is the only timing solution for synchronous Ethernet that does not require an external oscillator. It is available in a 19.5 x 15.5mm FR4 package and it is fully compliant with Telcordia GR-253-CORE, GR-1244-CORE, ITU-T G.813, and ITU-T G.8261.