ICS650-44 Datasheet, PDF (1/11 Pages) Integrated Circuit Systems – Spread Spectrum Clock Synthesizer

SPREAD SPECTRUM CLOCK SYNTHESIZER
DATASHEET
ICS650-44
Description
The ICS650-44 is a spread spectrum clock synthesizer
intended for video projector and digital TV applications. It
generates three copies of an EMI optimized 50 MHz clock
signal (EMI peak reduction of 7 to 14 dB on 3rd through
19th harmonics) through the use of Spread Spectrum
techniques from a 25 MHz crystal or clock input. The
modulation rate is 50 kHz.
Features
• Packaged in 16-pin TSSOP (173 mil)
• Supply voltages: VDD = 3.3 V, VDDO = 2.5 V
• Peak-to-peak jitter: ±125 ps typ
• Output duty cycle 45/55% (worst case)
• 25 MHz crystal or reference clock input
• Zero (0) ppm frequency error on all output clocks
• Advanced, low-power CMOS process
• Industrial temperature range (-40 to +85°C)
• Pb (lead) free package
Block Diagram
25 MHz crystal
or clock input
X1/CLKIN
X2
External capacitors are
required with a crystal
input.
FS3:0
Crystal
OSC
Control
Logic
VDD
3
VDDO
PLL with
Spread
Spectrum
50M
50M
50M
GND ²
PDTS
IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER
1
ICS650-44 REV E 051310