STC3800

STC3800 INTEGRATED - STRATUM 3E TIMING SOURCE 2111 Comprehensive Drive Aurora, Illinois 60505 Phone: 630- 851- 4722 Fax: 630- 851- 5040 www.conwin.com www.DataSheet4U.com Description The STC3800 is an integrated single chip solution for the Synchronous Timing Source in SONET/SDH network elements. The device generates four synchronous clocks, including BITS, and is fully compliant with Telcordia GR-1244-CORE, GR-253-CORE and ITU-T G.812/G.813. The STC3800 can operate in Free Run, locked or Hold Over mode. In the Free Run mode, it locks on an OCXO or TCXO. In the locked mode, it locks on one of 8 input reference clocks. The frequency of each input reference clock can be user selected or automatically detected by the device. The active reference can be automatically selected by the device based on a priority table or manually controlled by the user. All reference switches are hit-less. In Hold Over mode, the device generates outputs based on the frequency history of the last locked reference. The STC3800 supports the Master or Slave mode of operation for redundant designs. In master mode, the device operates in Free Run, locked or Hold Over. In slave mode, the output clocks are locked to the master’s primary Sync_Clk or 8 kHz synchronous clock output and are phase offset adjustable. Parallel or serial bus interfaces are provided to access STC3800 internal control and status registers. Major operations can be performed from either the bus interface or external hardwire pins. F...