CY25812 Cypress Semiconductor Corporation., CY25812 Datasheet

CY25812

Manufacturer Part Number

CY25812

Description

Manufacturer

Cypress Semiconductor Corporation.

Datasheets

1.CY25812.pdf (13 pages)

2.CY25812.pdf (12 pages)

3.CY25812.pdf (12 pages)

Specifications of CY25812

Case

SOP8

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Part Number

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Price

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Current page: 1 of 12
Download datasheet (107Kb)

FEATURES

GENERAL DESCRIPTION

The CY25811/12/14 products are Spread Spectrum Clock Generator (SSCG) ICs used for the purpose of reducing

Electro Magnetic Interference (EMI) found in today’s high-speed digital electronic systems.

The devices use a Cypress proprietary Phase-Locked Loop (PLL) and Spread Spectrum Clock (SSC) technology

to synthesize and modulate the frequency of the input clock. By frequency modulating the clock, the measured EMI

at the fundamental and harmonic frequencies is greatly reduced.

This reduction in radiated energy can significantly reduce the cost of complying with regulatory agency

requirements and improve time to market without degrading system performance.

The input frequency range is 4 to 32 MHz and accepts clock, crystal and ceramic resonator inputs. The output clock

can be selected to produce 1x, 2x or 4x multiplication of the input frequency with Spread Spectrum Frequency

Modulation.

The use of 2x or 4x frequency multiplication eliminates the need for higher order crystals and enables the user to

generate up to 128 MHz Spread Spectrum Clock (SSC) by using only first order crystals. This will reduce the cost

while improving the system clock accuracy, performance and complexity

Center Spread or Down Spread frequency modulation can be selected by the user based on 4 discrete values of

Spread % for each Spread Mode with the option of a Non-Spread mode for system test and verification purposes.

The CY25811/12/14 products are available in an 8 pin SOIC (150-mil.) package with a commercial operating

temperature range of 0 to 70 C. Contact Cypress for availability of -25 to +85 C Industrial Temperature Range

Operation. Refer to CY25568 for multiple clock output options such as modulated and unmodulated clock outputs

or Power Down function.

Cypress Semiconductor Corporation

525 Los Coches St.

Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571

http://www.cypress.com

4 to 32 MHz Input Frequency Range

4 to 128 MHz Output Frequency Range

Accepts Clock, Crystal and Resonator Inputs

1x, 2x and 4x Frequency Multiplication:

CY25811: 1x

Center and Down Spread Modulation

Frequency Range Selection

Low Power Dissipation :

Low Cycle-to Cycle Jitter:

Available in 8-pin (150 mil.) SOIC package

3.3V = 52 mW-typ @ 6MHz

3.3V = 60 mW-typ @ 12MHz

3.3V = 72 mW-typ @ 24MHz

16MHz = 175 ps-typ

32MHz = 100 ps-typ

8MHz = 195 ps-typ

CY25812: 2x

Approved Product

CY25814: 4x

Spread Spectrum Clock Generator

APPLICATIONS

BENEFITS

CY25811 / CY25812 / CY25814

Printers and MFPs

LCD Panels

Digital Copiers

PDAs

Automotive

CD-ROM, VCD and DVD

Networking, LAN/WAN

Scanners

Modems

Embedded Digital Systems

Peak EMI reduction by 8 to 16dB

Fast Time to Market

Cost Reduction

Document#: 38-07112 Rev. *A

Page 1 of 12

6/19/2001

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