VSC8142

The VSC8142, VSC8145 and VSC8147 are extended multi-rate transceivers with integrated Clock Recovery Unit (CRU) and Clock Multiplier Unit (CMU) for use in SONET/SDH, DWDM, and other optical transport systems. The devices perform all required serialization and deserialization functions for OC-48, OC- 12, OC-3, FEC, Gigabit Ethernet, Fibre Channel and FDDI/Fast Ethernet data rates.

The integrated CRU Phase Locked Loop (PLL) recovers the highspeed clock from the input Non-Return to Zero (NRZ) data signal. The integrated CMU PLL multiplies a low-speed reference clock to provide the high-speed serial line clock for internal logic and output retiming. Both CRU and CMU can be bypassed to accommodate rates not supported by the PLLs. The parallel interface incorporates an on-board FIFO with auto-reset to eliminating interfacetiming issues. The devices support serial looptiming as well as Facility, Equipment, and Split loopback modes.

The VSC8142, VSC8145 and VSC8147 exceed the Telecordia and ITU-T standards for jitter generation, tolerance and transfer providing ample design margin. The typical 800mW power dissipation, along with the thermally-enhance packages, eliminates the need for external heatsinks and allow the devices to be used in diverse operating environments. All device are available in commercial and industrial temperature ranges.