General Description

The VSC8121 is a monolithic Phase Locked Loop (PLL) based clock generator designed for telecommunications systems operating at 2.5Gb/s. The VSC8121 incorporates a reactance-based (LC) Voltage Controlled Oscillator (VCO) with low phase noise. The PLL’s loop filter is on-chip.

特性 Features

? Monolithic Phase Locked Loop

? On-Chip LC Oscillator

? On-Chip Loop Filter

? TTL/CMOS Reference Clock

? Selectable Reference

? Jitter Meets SONET OC-48 and

SDH STM-16 Requirements

? High-Speed CML Clock Output

? Single 3.3V Supply

? Compact 10mm x 10mm 44 Pin PQFP Package