Datasheet > W42C31

W42C31

更新时间： 2024-11-04 22:14:47

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		/
页数	文件大小	规格书
6页	139K
描述
Spread Spectrum Frequency Timing Generator

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W42C31 数据手册

W42C31-04

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 2.3X copy of the input

• Integrated loop filter components

• Operates with a 5V supply

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.

• Low power CMOS design

Table 1. Frequency Spread Selection

• Available in 8-pin SOIC (Small Outline Integrated

Circuit)

W42C31-04 Oscillator

Input

Frequency

(MHz)

XTAL Input

Frequency

(MHz)

Output

Frequency

(MHz)

Overview

FS0

The W42C31-04 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

20 to 30

2.3f ±0.625%

2.3f ±1.875%

Simplified Block Diagram

Pin Configuration

5.0V

SOIC

REFOUT

XTAL

Input

SSON#

VDD

GND

FS0

Spread Spectrum

Output

W42C31-04

CLKOUT

(EMI suppressed)

5.0V

Oscillator or Reference

Input

Spread Spectrum

W42C31-04

Output

(EMI suppressed)

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

September 29, 1999, rev. **

12 3 4 5 6

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W42C31-04GT	CYPRESS	获取价格	Clock Generator, 69.006MHz, CMOS, PDSO8, 0.150 INCH, PLASTIC, SO-8
W42C31-06	CYPRESS	获取价格	Spread Spectrum Frequency Timing Generator
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