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Manual Cypress CY25566

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Summary
  • Cypress CY25566 - page 1

    S pread S pectrum Clock Generator CY25566 Cypress Semiconductor Corpora tion • 3901 North First S treet • San Jose • CA 95134 • 408-943 -2600 Document #: 38-07429 Rev . *B Revised October 26, 20 05 Features • 25- to 200-MHz opera ting freq uen cy range • Wide range of spread selections (9) • Accepts clock or c rystal inputs • Provid ...

  • Cypress CY25566 - page 2

    CY25566 Document #: 38-07429 Rev . *B Page 2 of 9 General Description The Cypress CY25566 is a S pread S pectrum Clock Generator (SSCG) IC used for the purpose of reducin g electromagnetic interference (EMI) found in today’s high-speed digital electronic systems. The CY25566 uses a Cypress-proprietary phase-locked loop (PLL) and S pread Spectrum ...

  • Cypress CY25566 - page 3

    CY25566 Document #: 38-07429 Rev . *B Page 3 of 9 SSCLK1a/b SSCLK1a and SSCLK1b are spread spectrum clock outp uts used for the purpose of reducing EMI in digital systems. SSCLK1a and SSCLK1b ca n be connected in severa l different ways to provide flexibility in application desig ns. Each clock can drive separate nets with a capacitative load up to ...

  • Cypress CY25566 - page 4

    CY25566 Document #: 38-07429 Rev . *B Page 4 of 9 Modulation Rate S pread S pectrum clock generators utilize frequency modulation (FM) to distribute e nergy over a specific band of frequencies. The maximum freque ncy of the clock (Fmax) and minimum frequency of the clock (Fmin) determine this band of frequencies. The time required to transition fro ...

  • Cypress CY25566 - page 5

    CY25566 Document #: 38-07429 Rev . *B Page 5 of 9 T able 1. Frequency and Band width Selection Chart (Grou p 1)(Lo w Frequency (1x) Selection Ch art) 25–50 MHz (Low Range) XIN/CLK (MHz) S1 = M S0 = M S1 = M S0 = 0 S1 = 1 S0 = 0 S1 = 0 S0 = 0 S1 = 0 S0 = M 25–35 4.3 3.8 3.4 2.9 2.8 35–40 3.9 3.5 3.1 2.5 2.4 40–45 3.7 3.3 2.8 2.4 2.3 45–50 ...

  • Cypress CY25566 - page 6

    CY25566 Document #: 38-07429 Rev . *B Page 6 of 9 Application Schematic In this example, the CY255 66 is being driven by a 75-MHz reference clock. S0 = 0 and S1 = 0 are programmed to select a BW of 2.5%. (Refer to Ta b l e 1 and 2. ) S2 = 0 and S3 = 1 are programmed to select the Group 2 range. V DD = 3.30 VDC. SSCLK1a = 75 MHz @ 2.5% center spread ...

  • Cypress CY25566 - page 7

    CY25566 Document #: 38-07429 Rev . *B Page 7 of 9 Absolute Maximum Ratings [1, 2] Supply V oltage (V DD : ................. ........... .............. ............ .+6V Operating T emperature: ........ .............. .............. .. 0°C to 70°C S torage T emperature ... ... ... ... .............. .. ... ... –65°C to +150°C T able 4. DC Elec ...

  • Cypress CY25566 - page 8

    CY25566 Document #: 38-07429 Rev . *B Page 8 of 9 © Cypress Semico nductor Corpor ation, 2002. Th e information cont ained herein is subject to chan ge without not ice. Cypress Semico nductor Corporation assumes no respon sibility for the use of any circ uitry other than cir cuitry embodied i n a Cypress Semi conductor product. Nor does it convey ...

  • Cypress CY25566 - page 9

    CY25566 Document #: 38-07429 Rev . *B Page 9 of 9 Document Title:CY25566 Spread S pectrum Clock Generator Document Number: 38 -07429 Rev . ECN No. Issue Date Orig. of Change Description of Ch an ge ** 1 15771 07/01/02 OXC Ne w Data Sheet *A 122705 12/30/02 RBI Added power up require ments to maximum ratings information. *B 404070 See ECN RGL Minor ...

Manufacturer Cypress Category Clock

Documents that we receive from a manufacturer of a Cypress CY25566 can be divided into several groups. They are, among others:
- Cypress technical drawings
- CY25566 manuals
- Cypress product data sheets
- information booklets
- or energy labels Cypress CY25566
All of them are important, but the most important information from the point of view of use of the device are in the user manual Cypress CY25566.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Cypress CY25566, service manual, brief instructions and user manuals Cypress CY25566. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Cypress CY25566.

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A complete manual for the device Cypress CY25566, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Cypress CY25566 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Cypress CY25566.

A complete Cypress manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Cypress CY25566 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Cypress CY25566, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Cypress CY25566, that we can find in the current document
3. Tips how to use the basic functions of the device Cypress CY25566 - which should help us in our first steps of using Cypress CY25566
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Cypress CY25566
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Cypress CY25566 in a specific country, if it was not possible to solve the problem on our own.

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