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ICS91720 Datasheet

  • ICS91720

  • Low EMI, Spread Modulating, Clock Generator

  • 11頁(yè)

  • ICS

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Integrated
Circuit
Systems, Inc.
ICS91720
Low EMI, Spread Modulating, Clock Generator
Features:
Pin Configuration
鈥?/div>
ICS91720 is a Spread Spectrum Clock targeted for
8
PD#*
CLKIN
1
Mobile PC and LCD panel applications that
generates an EMI-optimized clock signal (EMI peak
7
SCLK
VDD
2
reduction of 7-14 dB on 3rd-19th harmonics) through
6
SDATA
GND
3
use of Spread Spectrum techniques.
5
REF_OUT/FS_IN1*
**CLKOUT/FS_IN0
4
鈥?/div>
ICS91720 focuses on the lower input frequency
range of 14.318 to 80.00 MHz with a spread
8 Pin SOIC/TSSOP
modulation of 20kHz to 40kHz.
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
Specifications:
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Supply Voltages: V
DD
= 3.3V 鹵0.3V
Frequency range: 14.318 MHz
鈮?/div>
Fin
鈮?/div>
80 MHz
Cyc to Cyc jitter: <150ps
Output duty cycle 45-55%
Guarantees +85擄C operational condition.
8-pin SOIC/TSSOP
Reference input
Functionality
FSIN_1 FSIN_0
MHz
0
0
14.318 MHz in --> 27MHz out
0
1
14.318MHz -->14.318MHz out
1
0
27.00MHz in --> 27.00MHz out
1
1
48.00MHz in -->48.00 MHz out
Spread % default
-0.8 down spread
-1.00 down spread
-1.25 down spread
-0.8 down spread
Block Diagram
REFOUT
CLKIN
PLL1
Spread
Spectrum
Spectrum
CLKOUT
CLKOUT
PD#
SDATA
SD
SCLK
FS_IN0:1
Control
Logic
Config.
Reg.
0698D鈥?0/05/04

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