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ICS650-44 Datasheet

SPREAD SPECTRUM CLOCK SYNTHESIZER

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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


Integrated Device Technology Electronic Components Datasheet

ICS650-44 Datasheet

SPREAD SPECTRUM CLOCK SYNTHESIZER

No Preview Available !

ICS650-44
SPREAD SPECTRUM CLOCK SYNTHESIZER
Pin Assignment
X1/ CLKIN
FS0
FS1
50M
VDD
GND
FS3
50M
1
2
3
4
5
6
7
8
16 X2
15 VDD
14 PDTS
13 FS2
12 VDD
11 GND
10 VDDO
9 50M
16-pin ( 173 mil) TSSOP
CLOCK SYNTHESIZER
Spread Spectrum and Output
Configuration Table
FS3 FS2 FS1 FS0
000 0
000 1
001 0
001 1
010 0
010 1
011 0
011 1
100 0
100 1
101 0
101 1
110 0
110 1
111 0
111 1
Spread Type
Center
Center
Center
Center
Center
Center
Center
Center
Down
Down
Down
Down
Down
Down
Down
Off
SS Out
±0.25
±0.50
±0.75
±1.00
±1.25
±1.50
±1.75
±2.00
-0.5
-0.75
-1.0
-1.25
-1.5
-1.75
-2.0
Off
IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER
2
ICS650-44 REV E 051310


Part Number ICS650-44
Description SPREAD SPECTRUM CLOCK SYNTHESIZER
Maker IDT
Total Page 11 Pages
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