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ICS91720 Datasheet(PDF) 1 Page - Integrated Circuit Systems

Part # ICS91720
Description  Low EMI, Spread Modulating, Clock Generator
PDF  11 Pages
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Manufacturer  ICST [Integrated Circuit Systems]
Direct Link  http://www.icst.com
Logo ICST - Integrated Circuit Systems

ICS91720 Datasheet(HTML) 1 Page - Integrated Circuit Systems

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Integrated
Circuit
Systems, Inc.
ICS91720
0698D—10/05/04
Block Diagram
Pin Configuration
Features:
•
ICS91720 is a Spread Spectrum Clock targeted for
Mobile PC and LCD panel applications that
generates an EMI-optimized clock signal (EMI peak
reduction of 7-14 dB on 3rd-19th harmonics) through
use of Spread Spectrum techniques.
•
ICS91720 focuses on the lower input frequency
range of 14.318 to 80.00 MHz with a spread
modulation of 20kHz to 40kHz.
Specifications:
•
Supply Voltages: VDD = 3.3V ±0.3V
•
Frequency range: 14.318 MHz
≤ Fin ≥ 80 MHz
•
Cyc to Cyc jitter: <150ps
•
Output duty cycle 45-55%
•
Guarantees +85°C operational condition.
•
8-pin SOIC/TSSOP
•
Reference input
Low EMI, Spread Modulating, Clock Generator
Functionality
CLK
CL
REFOUT
KOUT
OUT
PD#
PD#
CLKIN
CLKIN
PLL1
PLL1
Spread
Spread
Spectr
Spectrum
um
SD
SDATA
SCLK
SCLK
FS_IN0:1
Control
Control
Logic
Logic
Config.
Config.
Reg.
Reg.
CLKIN 18 PD#*
VDD 27 SCLK
GND 36 SDATA
**CLKOUT/FS_IN0 45 REF_OUT/FS_IN1*
** Internal Pull-Down Resistor
8 Pin SOIC/TSSOP
* Internal Pull-Up Resistor
FSIN_1 FSIN_0
0
0
-0.8 down spread
0
1
-1.00 down spread
1
0
27.00MHz in --> 27.00MHz out
-1.25 down spread
1
1
-0.8 down spread
48.00MHz in -->48.00 MHz out
MHz
Spread % default
14.318 MHz in --> 27MHz out
14.318MHz -->14.318MHz out


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