Datasheet > W185

W185

更新时间： 2024-11-09 11:47:07

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		/
页数	文件大小	规格书
8页	119K
描述
Six Output Peak Reducing EMI Solution

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W185 数据手册

W185

Six Output Peak Reducing EMI Solution

Features

Table 1. Modulation Width Selection

Cypress PREMIS™ family offering

• Generates an EMI optimized clocking signal at the

output

• Selectable output frequency range

• Six 1.25%, 3.75%, or 0% down or center spread outputs

• One non-Spread output of Reference input

• Integrated loop filter components

•

W185

W185-5

Output

SS%

Output

≥ F ≥ F – 1.25%

F + 0.625% ≥ F ≥

– 0.625%

out

≥ F ≥ F – 3.75%

F + 1.875% ≥ F ≥

–1.875%

out

• Operates with a 3.3V or 5V supply

• Low power CMOS design

Table 2. Frequency Range Selection

• Available in 24-pin SSOP (Shrink Small Outline

Package)

• Outputs may be selectively disabled

FS2

FS1

Frequency Range

28 MHz ≤ F ≤ 38 MHz

38 MHz ≤ F ≤ 48 MHz

Key Specifications

46 MHz ≤ F ≤ 60 MHz

Supply Voltages: ...........................................V = 3.3V±5%

58 MHz ≤ F ≤ 75 MHz

or V = 5V±10%

Frequency Range: ............................ 28 MHz ≤ F ≤ 75 MHz

Table 3. Output Enable

Crystal Reference Range:................. 28 MHz ≤ F ≤ 40 MHz

EN1

EN2

CLK0:4

CLK5

Cycle to Cycle Jitter: ....................................... 300 ps (max.)

Selectable Spread Percentage: ....................1.25% or 3.75%

Output Duty Cycle: ............................... 40/60% (worst case)

Output Rise and Fall Time: .................................. 5 ns (max.)

Low

Active

Low

Active

Simplified Block Diagram

Pin Configuration

3.3V or 5.0V

SSOP

REFOUT

FS2

SSON#

RESET

FS1

XTAL

Input

40MHz

max.

VDD

Spread Spectrum

Output

(EMI suppressed)

W185

GND

SS%

EN2

GND

18 EN1

CLK5

3.3V or 5.0V

VDD

CLK0

VDD

CLK1

CLK4

GND

CLK2 12

CLK3

Oscillator or

Reference Input

Spread Spectrum

W185

Output

(EMI suppressed)

PREMIS is a trademark of Cypress Semiconductor Corporation.

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

July 25, 2000, rev. *A

12 3 4 5 6 7 8

中文翻译

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