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Manual Cypress CY2291

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Summary
  • Cypress CY2291 - page 1

    CY2291 Three-PLL General Purpose EPROM Programmable Clock Generator Cypress Semiconductor Corpora tion • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document #: 38-07189 Rev . *C Revised September 16, 2008 Features ■ Three integrated phase-lo cked loops ■ EPROM programmability ■ Factory-programmable (CY2291) or field-pr ...

  • Cypress CY2291 - page 2

    CY2291 Document #: 38-07189 Rev . *C Page 2 of 12 Pinout s Figure 1. CY2291- 20-pin SOIC Pin Definitions Name Pin Number Description 32XOUT 1 32.768-kHz crystal feedback. 32K 2 32.768-kHz output (always active if VBA TT is present). CLKC 3 Configurable clo ck output C. VDD 4, 16 V oltage supply . GND 5 Ground. XT ALIN [1] 6 Reference crystal input ...

  • Cypress CY2291 - page 3

    CY2291 Document #: 38-07189 Rev . *C Page 3 of 12 Operation The CY2291 is a third-ge neration family of cl ock generators. The CY2291 is upwardl y compatible with the industry standard ICD2023 and ICD2028 and continu es their tradition by providing a high level o f customizable features to meet the diverse clock generation needs of modern motherbo ...

  • Cypress CY2291 - page 4

    CY2291 Document #: 38-07189 Rev . *C Page 4 of 12 Maximum Ratings (Exceeding maximum ratings may shorten the useful life of the device. User gui d el i ne s are not tested.) Supply V oltage ............... .............. .............. ....–0.5V to + 7.0V DC Input V oltage ...... ........... ... ... .. .............. ....–0.5V to + 7.0V S torag ...

  • Cypress CY2291 - page 5

    CY2291 Document #: 38-07189 Rev . *C Page 5 of 12 Electrical Characteristics, Commercial 3.3V Parameter Description Conditions Min. Ty p . Max. Unit V OH HIGH-Level Output V oltage I OH = 4.0 mA 2.4 V V OL LOW -Level O utput V oltage I OL = 4.0 mA 0.4 V V OH–32 32.768-kHz HIGH-Level Output V oltage I OH = 0.5 mA V BA TT 0.5 V V OL–32 32.768-kHz ...

  • Cypress CY2291 - page 6

    CY2291 Document #: 38-07189 Rev . *C Page 6 of 12 V IH HIGH-Level Input V oltage [9] Except crystal pins 2.0 V V IL LOW -Level I nput V oltage [9] Except cryst al pins 0.8 V I IH Input HIGH Current V IN = V DD –0 .5V < 1 10 μ A I IL Input LOW C ur rent V IN = +0.5V < 1 10 μ A I OZ Output Leakage Current Three-state outputs 250 μ A I DD V ...

  • Cypress CY2291 - page 7

    CY2291 Document #: 38-07189 Rev . *C Page 7 of 12 t 10B Lock T ime for UPLL and SPLL Lock T ime from Power Up < 0.25 1 ms Slew Limits CPU PLL Slew Limits CY2291 8 100 MHz CY2291F 8 90 MHz Switching Characteristics, Commercial 3.3 V Parameter Name Description Mi n. Ty p . Max. Unit t 1 Output Period Clock output range, 3.3V operation CY2291 12.5 ...

  • Cypress CY2291 - page 8

    CY2291 Document #: 38-07189 Rev . *C Page 8 of 12 Switching Characteristics, Industrial 5.0V Parameter Name Description Mi n. Ty p . Max. Unit t 1 Output Period Clock output range, 5V operation CY2291I 1 1.1 (90 MHz) 1 3000 (76.923 kHz) ns CY2291FI 12.5 (80 MHz) 1 3000 (76.923 kHz) ns Output Duty Cycle [1 1] Duty cycle for output s, defined as t 2 ...

  • Cypress CY2291 - page 9

    CY2291 Document #: 38-07189 Rev . *C Page 9 of 12 t 6 Output Enable Ti m e Time for output to leave three-st ate mode after SHUTDOWN /OE goes HIGH 10 1 5 ns t 7 Skew Skew delay between any identical or related outputs [3, 12, 15] < 0 .25 0. 5 ns t 8 CPUCLK Slew Frequency transition rate 1.0 20.0 MHz/ms t 9A Clock Jitter [14] Peak-to-peak period ...

  • Cypress CY2291 - page 10

    CY2291 Document #: 38-07189 Rev . *C Page 10 of 12 Switching W aveforms SELECT CPU OLD SELECT NEW SELECT STABLE F old F new t 8 &t 10 Figure 5. CPU Frequency Chang e T est Circuit Ordering Information Ordering Code Package T ype Operating Rang e Operatin g V oltage CY2291FI [16] 20-Pin SOIC Industrial 3.3V or 5.0V Pb-Free CY2291SXC–XXX 20-Pin ...

  • Cypress CY2291 - page 11

    CY2291 Document #: 38-07189 Rev . *C Page 1 1 of 12 Package Diagram Figure 6. 20-Pin (300 MI L) SOIC Package Outline 51-85024 *C [+] Feedback ...

  • Cypress CY2291 - page 12

    Document #: 38-07189 Rev . *C Revise d September 16, 2008 Page 12 of 12 Pentium is a registered trademark o f Inte l Corporation. CyClocks is a trademark o f Cy press Semiconductor Co rporation. All produ ct and comp any names me ntioned in this document are trad emarks of their respecti ve holders. CY2291 © Cypress Semicondu ctor Corpor ation, 20 ...

Manufacturer Cypress Category Clock

Documents that we receive from a manufacturer of a Cypress CY2291 can be divided into several groups. They are, among others:
- Cypress technical drawings
- CY2291 manuals
- Cypress product data sheets
- information booklets
- or energy labels Cypress CY2291
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 CY2291.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Cypress CY2291, service manual, brief instructions and user manuals Cypress CY2291. 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 CY2291.

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A complete manual for the device Cypress CY2291, 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 CY2291 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Cypress CY2291.

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 CY2291 - 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 CY2291, 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 CY2291, that we can find in the current document
3. Tips how to use the basic functions of the device Cypress CY2291 - which should help us in our first steps of using Cypress CY2291
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Cypress CY2291
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Cypress CY2291 in a specific country, if it was not possible to solve the problem on our own.

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