Datasheet > 557GI-05A

557GI-05A

更新时间： 2024-11-10 07:57:15

品牌	Logo	应用领域
矽成 - ICSI		晶体外围集成电路光电二极管 PC 时钟
页数	文件大小	规格书
12页	261K
描述
Quad Differential PCI-Express Clock Source

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557GI-05A 数据手册

ICS557-05A

Quad Differential PCI-Express Clock Source

Description

Features

The ICS557-05A is a spread-spectrum clock generator

that supports PCI-Express requirements. It is used in

PC or embedded systems to substantially reduce

electro-magnetic interference (EMI). The device

provides four differential HCSL or LVDS high-frequency

outputs with spread spectrum capability. The output

frequency and spread type are selectable using

external pins.

• Packaged in 20-pin TSSOP

• Available in Pb (lead) free package

• Supports PCI-Express applications

• Four differential spread spectrum clock outputs

• Spread spectrum for EMI reduction

• Uses external 25 MHz clock or crystal input

• Power down pin turns off chip

• OE control tri-states outputs

• Spread and frequency selection via external pins

• Spread Bypass option available

• Industrial temperature range available

Block Diagram

VDD

Spread

Spectrum/

Output

Spread

Spectrum

Circuitry

SEL[2:0]

clock

selection

CLKOUTA

CLKOUTB

25 MHz

crystal or

clock

Clock

Oscillator

PLL Clock

Synthesis

CLKOUTB

CLKOUTC

CLKOUTD

Optional tuning crystal

capacitors

CLKOUTD

Rr(IREF)

GND

MDS 557-05A E

Revision 011606

Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

12 3 4 5 6 7...12

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