DESCRIPTION
The SY89429A is a general purpose, synthesized clock source targeting applications that require both serial and parallel interfaces. Its internal VCO will operate over a range of frequencies from 400MHz to 800MHz. The differential PECL output can be configured to be the VCO frequency divided by 2, 4, 8 or 16. With the output configured to divide the VCO frequency by 2, and with a 16MHz external quartz crystal used to provide the reference frequency, the output frequency can be specified in 1MHz steps.

FEATURES
■ Improved jitter performance over SY89429
■ 25MHz to 400MHz differential PECL outputs
■ ±25ps peak-to-peak output jitter
■ Minimal frequency over-shoot
■ Synthesized architecture
■ Serial 3 wire interface
■ Parallel interface for power-on
■ Internal quartz reference oscillator driven by quartz crystal or PECL source
■ PECL output can operate with either +3.3V or +5V VCC_OUT power supply
■ External loop filter optimizes performance/cost
■ Applications note (AN-06) for ease of design-ins
■ Available in PLCC and SOIC 28-pin packages

APPLICATIONS
■ Workstations
■ Advanced communications
■ High end consumer
■ High-performance computing
■ RISC CPU clock
■ Graphics pixel clock
■ Test equipment
■ Other high-performance processor-based applications