Datasheet > W42C31-09G

W42C31-09G

更新时间： 2024-11-04 23:41:35

品牌	Logo	应用领域
其他 - ETC		时钟驱动器
页数	文件大小	规格书
7页	148K
描述
Clock Driver

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中文翻译

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数据手册

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W42C31-09G 数据手册

W42C31-09

Spread Spectrum Frequency Timing Generator

to pass increasingly difficult EMI testing without resorting to

costly shielding or redesign.

Features

• Maximized EMI suppression using Cypress’s Spread

Spectrum technology

• Generates a spread spectrum copy of the provided

input

• Integrated loop filter components

• Operates with a 3.3V or 5V supply

• Low-power CMOS design

• Available in 8-pin SOIC (Small Outline Integrated

Circuit)

In a system, not only is EMI reduced in the various clock lines,

but also in all signals which are synchronized to the clock.

Therefore, the benefits of using this technology increase with

the number of address and data lines in the system. The Sim-

plified Block Diagram shows a simple implementation.

Table 1. Frequency Spread Selection

W42C31-09

Input Frequency

(MHz)

Output Frequency

(MHz)

FS1

FS0

Overview

30 to 55

±0.625%

±1.25%

±2.5%

The W42C31-09 incorporates the latest advances in PLL

spread spectrum frequency synthesizer techniques. By fre-

quency modulating the output with a low-frequency carrier,

EMI is greatly reduced. Use of this technology allows systems

–3.75%

Simplified Block Diagram

Pin Configuration

VDD

SOIC

CLKIN

SSON#

CLKOUT

FS0

GND

FS1

VDD

Oscillator or Reference

Input

Spread Spectrum

W42C31-09

Output

(EMI suppressed)

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

January 25, 2000, rev. *B

12 3 4 5 6 7

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