Low Jitter Timing Modules
Wed, 09/26/2007 - 8:17am
Valpey Fisher Corporation introduces its VFJA432 and VFJA434 quartz crystal-based integrated timing modules on a single chip that provide reliable synchronization of Ethernet networks. These timing modules can synchronize an Ethernet physical layer to a telecom network timing reference while generating a 0.18 picosecond jitter Ethernet clock. Jitter attenuators can synchronize to common telecom frequencies such as 8 KHz and 19.44 MHz from the backplane or common Ethernet frequencies such as 25 MHz and 125 MHz from the physical layer. The input frequency is selectable from four preset frequencies. Once the timing module synchronizes to the input frequency, the VFJA432 and VFJA434 can provide dual and quad output frequencies, respectively, from 10 MHz to 200 MHz.