ICS91730 datasheet(1/11 Pages) ICST

Part #	ICS91730

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

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1 / 11 page

Integrated

Circuit

Systems, Inc.

ICS91730

0794D—05/23/05

Block Diagram

Pin Configuration

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

Low EMI, Spread Modulating, Clock Generator

Functionality

CLK

CL

REFOUT

KOUT

OUT

PD#

CLKIN

PLL1

Spread

Spectr

Spectrum

um

SD

SDA

AT

TA

A

SCLK

FS_IN1

Control

Logic

Config.

Reg.

FSIN_1

0

-0.8 down spread

1

-1.25 down spread

27.00MHz in --> 27.00MHz out

MHz

Spread % default

14.318 MHz in --> 27MHz out

CLKIN 18 PD#*

VDD 27 SCLK

GND 36 SDATA

CLKOUT 45 REF_OUT/FS_IN1*

8 Pin SOIC

* Internal Pull-Up Resistor

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