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SY89429V

Micrel, Inc.

M9999-011106

hbwhelp@micrel.com or (408) 955-1690

The SY89429V 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.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

FEATURES

DESCRIPTION

SY89429V

5V/3.3V PROGRAMMABLE

FREQUENCY SYNTHESIZER

(25MHz to 400MHz)

■ 3.3V and 5V power supply options

■ 25MHz to 400MHz differential PECL outputs

■ 50ps 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

■ Application Note (AN-07) for ease of design-ins

■ Available in 28-pin PLCC and SOIC 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

Rev.: J

Amendment: /0

Issue Date:

January 2006

Precision Edge is a registered trademark of Micrel, Inc.