SCG102A

The SCG102A provides high precision phase lock loop frequency translation for the telecommunication applications.

The SCG102A product generates LVPECL outputs from an intrinsically low jitter, voltage controlled crystal oscillator.

SCG102A is well suited for use in line cards, service termination cards and similar functions to provide reliable reference, phase locked, synchronization for TDM, PDH, SONET and SDH network equipment . The SCG102A provides a jitter  filtered, wander following output signal sychronized to a superior Stratum or peer input reference signal.

The SCG102A includes a lock detect alarm output. The PLL control voltage is brought out through a 470 k restistor and can be used to determine when the pull range limits are reached.The LVPECL outputs may be put into the tri-state high impedance condition for external testing purposes by asserting a high signal to the Enable/Disable pin.

The SCG102A is a 3.3 Volt component that will typically draw 75mA. The SCG102A is designed to be used in applications that require temperature rating of -40°C - 85° C. The SCG102A package typical dimensions are 1.0" x 0.80" x 0.285" (See fig. 2 for maximum dimensions). Parts are assembled using high temperature solder to withstand surface mount reflow process.

The SCG102A locks to any one of four pred-determined input frequencies selected using the SELECT (A&B) lines (See Table 4). The output may be any single frequency from 77.76 MHz to 170 MHZ.