ICS477-05 Datasheet, PDF (1/7 Pages) Integrated Circuit Systems – Quad PLL with VCXO for HDTV

ICS477-05
Quad PLL with VCXO for HDTV
Description
The ICS477-05 generates five high-quality,
high-frequency clock outputs including two reference
outputs from a low frequency pullable crystal. It is
designed to replace crystals and crystal oscillators in
most electronic systems.
Using Phase-Locked-Loop (PLL) techniques, the
device runs from a fundamental mode, pullable crystal.
It can replace multiple crystals and oscillators, saving
board space and cost.
Features
• Packaged in 28-pin SSOP (QSOP)
• Available in Pb-free packaging
• Replaces a VCXO plus multiple crystals and
oscillators
• On-chip patented VCXO pull range 200 ppm
(minimum)
• Duty cycle of 45/55
• Operating voltage of 3.3V
• Advanced, low power, CMOS process
• Input crystal frequency of 27 MHz
• Five output clocks
• Industrial temperature range available
Block Diagram
VIN
27 MHz
Pullable
Crystal
X1
X2
Voltage
Controlled
Crystal
Oscillator
External capacitors
may be required
VDD
6
PLLA
PLLB
PLLC
PLLD
Divide
Logic
and
Output
Enable
Control
54.054M
74.175M
54M
2 _27M
PDTS
10
GND
MDS 477-05 H
1
Revision 062404
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel [phone] ● www.icst.com