Aurora, Ill. Connor Winfield offers design engineers a single-chip solution for a new generation of Stratum 3E synchronous applications.
The Stratum 3E compliant STC3800 integrated solution is designed for the synchronous timing source in SONET/SDH network elements, and is the same engine as used in the company's SM3E module. It's fully compliant with Telcordia GR-1244-CORE, GR-253-CORE, ITU-T G.812/G813.
The 3.3-volt STC3800 chip supports master/slave operation and can operate in free run, locked or hold over mode. In the free run mode, it locks on to an OCXO. In the locked mode, it locks on to one of eight input reference clocks with automatic frequency detection. It accepts eight reference inputs and one cross reference each from 8 kHz to 77.76 MHz, and provides continuous input reference quality monitoring. Input reference frequency is automatically detected.
The solution also offers four output signals and one selectable 1.544 MHz or 2.048 MHz VBITS output. The output phase is adjustable in slave mode. In addition, it offers better than 1 ppb hold over accuracy when used with the company's OCXOs, and supports SPI and 8-bit parallel bus interface. The configurable bandwidth filter ranges from .00084 to 1.6 Hz.
Other features include automatic or manual selection for active reference, frequency ramp control during reference switching, and hitless reference switching.
Available in a FBGA144 package, the chip solution is priced at $178 in quantities of 1,000. Delivery is four to six weeks. Prototype quantities are available now.
Call (630) 851-4722