CY25819SXCT

CY25819SXCT Datasheet

CY25819

Part	Datasheet
CY25819SXCT	CY25819SXCT (pdf)

Related Parts	Information
CY25819SXC	CY25819SXC

PDF Datasheet Preview
CY25819 Spread Spectrum Clock Generator Spread Spectrum Clock Generator n 8- to 32-MHz input frequency range n CY25819 16 MHz to 32 MHz n Separate modulated and unmodulated clocks n Accepts clock, crystal, and resonator inputs n Down spread modulation n Power-down function n Low-power dissipation p CY25819 = 36 mW typ at 16 MHz p CY25819 = 63 mW typ at 32 MHz n Low cycle-to-cycle jitter p SSCLK = 250 ps typ p REFOUT = 275 ps typ n Available in 8-pin 150 mil SOIC package Block Diagram 300K XIN/CLKIN 1 XOUT 8 VDD 7 VSS 2 n Printers and MFPs n LCD panels and notebook PCs n Digital copiers n PDAs n Automotive n CD-ROM, VCD, and DVD n Networking and LAN/WAN n Scanners n Modems n Embedded digital systems n Peak electromagnetic interference EMI reduction by 8 dB to 16 dB n Fast time to market n Cost reduction REFERENCE DIVIDER PD and CP MODULATION CONTROL VCO COUNTER INPUT DECODER 36 S0 PD# DIVIDER and MUX 4 SSCLK 5 REFCLK • San Jose, CA 95134-1709 • 408-943-2600 CY25819 Contents Pin Configuration 3 Pin Description 3 Overview 4 Input Frequency Range and Selection 4 Spread% Selection 4 3-Level Digital Inputs 5 Modulation Rate 5 Maximum Ratings 6 DC Electrical Characteristics 6 Timing Electrical Characteristics 6 Characteristics Curves 7 SSCG Profiles 8 Application Schematic 9 Ordering Information 9 Ordering Code Definitions 9 Package Drawing and Dimensions 10 Acronyms 11 Document Conventions 11 Units of Measure 11 Document History Page 12 Sales, Solutions, and Legal Information 13 Worldwide Sales and Design Support 13 Products 13 PSoC Solutions 13 Page 2 of 13 CY25819 Pin Configuration 8-pin SOIC XIN/CLKIN 1 8 XOUT Vss 2 CY25818 CY25819 7 Vdd 6 PD# SSCLK 4 5 REFCLK Pin Description Name 1 XIN/CLK Clock, Crystal, or Ceramic Resonator Input Pin. Vss Power Supply Ground. S0 Digital Spread% Control Pin. 3-Level input H-M-L . Default = M. SSCLK Modulated Spread Spectrum Output Clock. The output frequency is referenced to input frequency. Refer to Table 2 on page 4 for the amount of modulation Spread% . REFCLK Unmodulated Reference Clock Output. The unmodulated output frequency is the same as the input frequency. PD# Power Down Control Pin. Default = H Vdd . Vdd Positive Power Supply. XOUT Clock, Crystal, or Ceramic Resonator Output Pin. Leave this pin unconnected if an external clock is used at XIN pin. Page 3 of 13 CY25819 Overview The Cypress CY25819 products are Spread Spectrum Clock Generator SSCG ICs used for the purpose of reducing 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 MHz for the CY25818 and MHz for the CY25819. Both products accept external clock, crystal, or ceramic resonator inputs. The CY25819 provide separate modulated SSCLK and unmodulated reference REFCLK clock outputs which are the same frequency as the input clock frequency. Down spread frequency modulation can be selected by the user, based on three discrete values of Spread%. A separate power down function is also provided. The CY25819 products are available in an 8-pin SOIC 150-mil package with a commercial operating temperature range of C. Contact Cypress for availability of to +85 C industrial temperature range operation or TSSOP package versions. Input Frequency Range and Selection CY25819 input frequency range is MHz. This range is divided into two segments, as given in Table Table Input and Output Frequency Selection Product Input/Output Frequency Range CY25819 Spread% Selection Ordering Information Part Number Pb-Free CY25819SXC CY25819SXCT Package Type 8-pin SOIC 8-pin and Reel Ordering Code Definitions CY 25819 S X C T T = Tape and Reel blank = Tube Temperature Range C = Commercial Pb-free Package S = 8-pin SOIC Base part number Company ID CY = Cypress Product Flow Commercial, 0C to 70C Commercial, 0C to 70C Page 9 of 13 Package Drawing and Dimensions Figure 8-pin SOIC 150 Mils S08.15/SZ08.15 CY25819 51-85066 *F Page 10 of 13 Acronyms Acronym digital versatile/video disc electromagnetic interference input/output local area network liquid crystal display phase locked loop SOIC small-outline integrated circuit spread spectrum clock SSCG spread spectrum clock generator video compact disc wide area network CY25819 Document Conventions Units of Measure Symbol dB °C MHz mA mm ms mW ns % pF ps V W Unit of Measure decibel degree Celsius Mega Hertz milli Amperes milli meter milli seconds milli Watts nano seconds ohms percent pico Farad pico seconds Volts Watts Page 11 of 13 CY25819 Document History Page Document Title CY25819, Spread Spectrum Clock Generator Document Number 38-07362 ECN No. Issue Date Orig. of Change Description of Change 112462 03/21/02 OXC New Data Sheet 122701 12/28/02 RBI Added power up requirements to maximum rating information. 448097 See ECN RGL Add Lead-free devices 2901658 03/30/10 BASH Removed inactive parts from the ordering information table. Updated package diagram and contents. 3253540 05/10/2011 CXQ Added Ordering Code Definitions. Added Acronyms and Units of Measure. Updated in new template. Page 12 of 13 CY25819 Sales, Solutions, and Legal Information Worldwide Sales and Design Support Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at Cypress Locations. Products Automotive Clocks & Buffers Interface Lighting & Power Control Memory Optical & Image Sensing PSoC Touch Sensing USB Controllers Wireless/RF cypress.com/go/automotive cypress.com/go/clocks cypress.com/go/interface cypress.com/go/powerpsoc cypress.com/go/plc cypress.com/go/memory cypress.com/go/image cypress.com/go/psoc cypress.com/go/touch cypress.com/go/USB cypress.com/go/wireless PSoC Solutions psoc.cypress.com/solutions PSoC 1 \| PSoC 3 \| PSoC 5 Cypress Semiconductor Corporation, The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Any Source Code software and/or firmware is owned by Cypress Semiconductor Corporation Cypress and is protected by and subject to worldwide patent protection United States and foreign , United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress. Disclaimer CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Use may be limited by and subject to the applicable Cypress software license agreement. All products and company names mentioned in this document may be the trademarks of their respective holders. Page 13 of 13

PDF Datasheet Preview

CY25819

Spread Spectrum Clock Generator

Spread Spectrum Clock Generator
n 8- to 32-MHz input frequency range n CY25819 16 MHz to 32 MHz n Separate modulated and unmodulated clocks n Accepts clock, crystal, and resonator inputs n Down spread modulation n Power-down function n Low-power dissipation
p CY25819 = 36 mW typ at 16 MHz p CY25819 = 63 mW typ at 32 MHz n Low cycle-to-cycle jitter p SSCLK = 250 ps typ p REFOUT = 275 ps typ n Available in 8-pin 150 mil SOIC package

Block Diagram
300K

XIN/CLKIN 1

XOUT 8

VDD 7

VSS 2
n Printers and MFPs n LCD panels and notebook PCs n Digital copiers n PDAs n Automotive n CD-ROM, VCD, and DVD n Networking and LAN/WAN n Scanners n Modems n Embedded digital systems
n Peak electromagnetic interference EMI reduction by 8 dB to 16 dB
n Fast time to market n Cost reduction

REFERENCE DIVIDER

PD and CP

MODULATION CONTROL

VCO COUNTER

INPUT DECODER
36 S0 PD#

DIVIDER and MUX
4 SSCLK 5 REFCLK
• San Jose, CA 95134-1709
• 408-943-2600

CY25819

Contents

Pin Configuration 3 Pin Description 3 Overview 4 Input Frequency Range and Selection 4 Spread% Selection 4 3-Level Digital Inputs 5 Modulation Rate 5 Maximum Ratings 6 DC Electrical Characteristics 6 Timing Electrical Characteristics 6 Characteristics Curves 7 SSCG Profiles 8 Application Schematic 9
Ordering Information 9 Ordering Code Definitions 9

Package Drawing and Dimensions 10 Acronyms 11 Document Conventions 11

Units of Measure 11 Document History Page 12 Sales, Solutions, and Legal Information 13

Worldwide Sales and Design Support 13 Products 13 PSoC Solutions 13

Page 2 of 13

CY25819

Pin Configuration
8-pin SOIC

XIN/CLKIN 1
8 XOUT

Vss 2 CY25818 CY25819
7 Vdd 6 PD#

SSCLK 4
5 REFCLK

Pin Description

Name
1 XIN/CLK Clock, Crystal, or Ceramic Resonator Input Pin.

Vss Power Supply Ground.

S0 Digital Spread% Control Pin. 3-Level input H-M-L . Default = M.

SSCLK

Modulated Spread Spectrum Output Clock. The output frequency is referenced to input frequency. Refer to Table 2 on page 4 for the amount of modulation Spread% .

REFCLK

Unmodulated Reference Clock Output. The unmodulated output frequency is the same as the input frequency.

PD# Power Down Control Pin. Default = H Vdd .

Vdd Positive Power Supply.

XOUT

Clock, Crystal, or Ceramic Resonator Output Pin. Leave this pin unconnected if an external clock is used at XIN pin.

Page 3 of 13

CY25819

Overview

The Cypress CY25819 products are Spread Spectrum Clock Generator SSCG ICs used for the purpose of reducing 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 MHz for the CY25818 and MHz for the CY25819. Both products accept external clock, crystal, or ceramic resonator inputs.

The CY25819 provide separate modulated SSCLK and unmodulated reference REFCLK clock outputs which are the same frequency as the input clock frequency. Down spread frequency modulation can be selected by the user, based on three discrete values of Spread%. A separate power down function is also provided.

The CY25819 products are available in an 8-pin SOIC 150-mil package with a commercial operating temperature range of C. Contact Cypress for availability of to +85 C industrial temperature range operation or TSSOP package versions.

Input Frequency Range and Selection

CY25819 input frequency range is MHz. This range is divided into two segments, as given in Table

Table Input and Output Frequency Selection

Product

Input/Output Frequency Range

CY25819

Spread% Selection
Ordering Information

Part Number Pb-Free CY25819SXC CY25819SXCT

Package Type
8-pin SOIC 8-pin and Reel
Ordering Code Definitions CY 25819 S X C T

T = Tape and Reel blank = Tube Temperature Range C = Commercial Pb-free Package S = 8-pin SOIC Base part number Company ID CY = Cypress

Product Flow

Commercial, 0C to 70C Commercial, 0C to 70C

Page 9 of 13

Package Drawing and Dimensions

Figure 8-pin SOIC 150 Mils S08.15/SZ08.15

CY25819
51-85066 *F

Page 10 of 13

Acronyms

Acronym
digital versatile/video disc
electromagnetic interference
input/output
local area network
liquid crystal display
phase locked loop

SOIC
small-outline integrated circuit
spread spectrum clock

SSCG
spread spectrum clock generator
video compact disc
wide area network

CY25819

Document Conventions

Units of Measure

Symbol dB °C MHz mA mm ms mW ns % pF ps V W

Unit of Measure decibel degree Celsius Mega Hertz milli Amperes milli meter milli seconds milli Watts nano seconds ohms percent pico Farad pico seconds Volts Watts

Page 11 of 13

CY25819

Document History Page

Document Title CY25819, Spread Spectrum Clock Generator Document Number 38-07362

ECN No. Issue Date

Orig. of Change

Description of Change
112462 03/21/02 OXC New Data Sheet
122701 12/28/02

RBI Added power up requirements to maximum rating information.
448097 See ECN RGL Add Lead-free devices
2901658 03/30/10 BASH Removed inactive parts from the ordering information table. Updated
package diagram and contents.
3253540 05/10/2011 CXQ Added Ordering Code Definitions.

Added Acronyms and Units of Measure.

Updated in new template.

Page 12 of 13

CY25819

Sales, Solutions, and Legal Information

Worldwide Sales and Design Support

Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at Cypress Locations.

Products Automotive Clocks & Buffers Interface Lighting & Power Control

Memory Optical & Image Sensing PSoC Touch Sensing USB Controllers Wireless/RF
cypress.com/go/automotive cypress.com/go/clocks
cypress.com/go/interface cypress.com/go/powerpsoc
cypress.com/go/plc cypress.com/go/memory
cypress.com/go/image cypress.com/go/psoc cypress.com/go/touch cypress.com/go/USB
cypress.com/go/wireless

PSoC Solutions psoc.cypress.com/solutions PSoC 1 | PSoC 3 | PSoC 5

Cypress Semiconductor Corporation, The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

Any Source Code software and/or firmware is owned by Cypress Semiconductor Corporation Cypress and is protected by and subject to worldwide patent protection United States and foreign , United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress.

Disclaimer CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

Use may be limited by and subject to the applicable Cypress software license agreement.

All products and company names mentioned in this document may be the trademarks of their respective holders.

Page 13 of 13

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Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived CY25819SXCT Datasheet file may be downloaded here without warranties.

Datasheet ID: CY25819SXCT 507712