ICS91730 Datasheet, PDF (1/11 Pages) Integrated Circuit Systems – Low EMI, Spread Modulating, Clock Generator

Integrated
Circuit
Systems, Inc.
ICS91730
Low EMI, Spread Modulating, Clock Generator
Features:
• ICS91730 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.
• ICS91730 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
• Reference input
Pin Configuration
CLKIN 1
VDD 2
GND 3
CLKOUT 4
8 PD#*
7 SCLK
6 SDATA
5 REF_OUT/FS_IN1*
8 Pin SOIC
* Internal Pull-Up Resistor
Functionality
FSIN_1
0
1
MHz
14.318 MHz in --> 27MHz out
27.00MHz in --> 27.00MHz out
Spread % default
-0.8 down spread
-1.25 down spread
Block Diagram
CLKIN
PLL1
Spread
Spectrum
REFOUT
CLKOUT
PD#
SDATA
SCLK
FS_IN1
0794D—05/23/05
Control
Logic
Config.
Reg.