The ZL30136 GbE and Telecom Rate Network Interface Synchronizer is a highly integrated cost-effective device that provides timing for network interface cards. The DPLL is capable of locking to one of three input references and provides standard Ethernet clock rates for synchronizing Ethernet PHYs, and a highly programmable clock and frame pulse for telecom interfaces such as T1/E1, DS3/E3, etc. Click here for secure documentation