DATASHEET
QUAD PLL WITH VCXO FOR HDTV
ICS477-05
Description
Features
• Packaged in 28-pin SSOP (QSOP)
• Available in Pb-free packaging
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.
• Replaces a VCXO plus multiple crystals and
oscillators
• On-chip patented VCXO pull range 200 ppm
(minimum)
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.
• 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
VDD
6
VIN
54.054M
27 MHz
Pullable
Crystal
PLLA
Divide
Logic
and
74.175M
X1
PLLB
PLLC
PLLD
Voltage
Controlled
Crystal
Output
Enable
Control
X2
Oscillator
54M
External capacitors
may be required
2
27M
10
GND
PDTS
IDT™ / ICS™ QUAD PLL WITH VCXO FOR HDTV
1
ICS477-05
REV H 062404
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
