CY2XF24FLXCT

CY2XF24FLXCT Datasheet

CY2XF24

Part	Datasheet
CY2XF24FLXCT	CY2XF24FLXCT (pdf)

Related Parts	Information
CY2XF24FLXIT	CY2XF24FLXIT
CY2XF24LXI625T	CY2XF24LXI625T

PDF Datasheet Preview
CY2XF24 High Performance LVPECL Oscillator with Frequency Margining I2C Control • Low jitter crystal oscillator XO • Less than 1 ps typical root mean square RMS phase jitter • Differential low-voltage positive emitter coupled logic LVPECL output • Output frequency from 50 MHz to 690 MHz • Frequency margining through I2C bus • Factory-configured or field-programmable • Integrated phase-locked loop PLL • Pb-free package x mm leadless chip carrier LCC • Supply voltage V or V • Commercial and industrial temperature ranges Functional Description The CY2XF24 is a high-performance and high-frequency XO. It uses a Cypress-proprietary low-noise PLL to synthesize the frequency from an integrated crystal. The output frequency can be changed using the I2C bus serial interface, allowing easy frequency margin testing in applications. The CY2XF24 is available as a factory-configured device or as a field-programmable device. Factory-configured devices are configured for general use see Standard and Application-Specific Factory Configurations or they can be customer specific. Logic Block Diagram CRYSTAL OSCILLATOR 1 SDA 2 SCL I2C INTERFACE LOW-NOISE PLL PROGRAMMABLE CONFIGURATION OUTPUT DIVIDER 4 CLK 5 CLK# • San Jose, CA 95134-1709 • 408-943-2600 Pinouts Figure Pin Diagram 6 Pin Ceramic LCC SDA 1 SCLK 2 VSS 3 6 VDD 5 CLK# 4 CLK Table Pin Definitions Pin 1 2 4, 5 6 3 Name SDA SCLK CLK, CLK# VDD VSS I/O Type I/O CMOS input LVPECL output Power I2C serial data I2C serial clock Differential output clock Supply voltage V or V Ground CY2XF24 Page 2 of 17 CY2XF24 Contents Standard and Application-Specific Factory Configurations 4 Functional Description 4 Configuration Software 4 Programming Description 4 Field-Programmable CY2XF24F 4 Factory-Configured CY2XF24 5 Programming Variables 5 Output Frequencies 5 Industrial versus Commercial Device Performance 5 Memory Map 5 Serial Interface Protocol and Timing 5 Device Address 5 Data Valid 5 Data Frame 5 Acknowledge Pulse 6 Write Operations 6 Writing Individual Bytes 6 Writing Multiple Bytes 6 Read Operations 6 Current Address Read 6 Random Read 6 Sequential Read 6 Absolute Maximum Conditions 8 Operating Conditions 8 DC Electrical Characteristics 8 AC Electrical Characteristics 9 I2C Bus Timing Specifications 10 Typical Output Characteristics 10 Measurement Definitions 12 Termination Circuits 12 Ordering Information 13 Possible Configurations 13 Package Drawings and Dimensions 14 Acronyms 15 Document Conventions 15 Units of Measure 15 Document History Page 16 Sales, Solutions, and Legal Information 17 Worldwide Sales and Design Support 17 Products 17 PSoC Solutions 17 Page 3 of 17 CY2XF24 Standard and Application-Specific Factory Configurations Part Number CY2XF24LXI625T CY2XF24LXI009T Output Frequency Word MHz default 100 MHz default 350 MHz 400 MHz RMS Phase Jitter Random Offset Range Jitter Typical MHz to 20 MHz to 20 MHz to 20 MHz to 20 MHz 12 kHz to 20 MHz 12 kHz to 20 MHz 12 kHz to 20 MHz 12 kHz to 20 MHz Functional Description Figure Frequency Words The CY2XF24 is a PLL-based high-performance clock generator. It uses an internal crystal oscillator as a reference, and outputs one differential LVPECL clock. It has an I2C bus serial interface[1], which is used to change the output frequency. The CY2XF24 comes configured for four different frequencies. At power-on, the four configurations are transparently loaded into an internal volatile memory which, in turn, controls the PLL. You can switch between the four frequencies through the I2C bus. You can also configure the CY2XF24 with new output frequencies by shifting new data into the internal memory. Frequency margining is a common application for this feature. One frequency is used for the standard operating mode of the device, while additional frequencies are available for margin testing, either during product development or in-system manufacturing test. Note that all configuration changes made using I2C are temporary and are lost when power is removed from the device. At power-on, the device returns to its original state. The configuration for a particular frequency is stored in a 6-byte block of memory, known as a word. The CY2XF24 has four such words, labeled ‘Frequency Word 0’ through ‘Frequency Word An additional register byte contains a 2-bit field, which selects one of the four frequency words. By writing to this Select Byte, you can switch back and forth between the four programmed frequencies. The select byte can be configured to select any of the four frequency words at power on. When changing the output frequency, the frequency transition is not guaranteed to be smooth. There can be frequency excursions beyond the start frequency and the new frequency. Glitches and runt pulses are possible, and time must be allowed for the PLL to relock. If more than four frequencies are needed, the I2C Bus can be used to change any of the four frequency words. When writing frequency words through I2C, you should not change the currently selected word. Instead, write one of the three unselected words before changing the select byte to select that new word. Figure 2 shows how the frequency words are arranged and selected. Register Address 10h 15h Frequency Word 0 16h 1Bh 1Ch 21h Frequency Word 1 Frequency Word 2 Control 22h 27h Frequency Word 3 Select Byte Bits [1:0] 11 Sel Configuration Software Cypress provides CyClockWizard software that enables users to create data values for shifting into the frequency words. This software is required because the algorithm is too complicated to be described here. The user specifies the output frequency. The software then calculates the bit stream for up to four frequency words, as outlined by the register addresses for each word seen in Figure Programming Description Ordering Information Part Number Pb-free CY2XF24FLXCT Configuration Field-programmable CY2XF24FLXIT CY2XF24LXI625T[9] CY2XF24LXI009T[9] Field-programmable Factory-Configured Factory-Configured Package Description 6-pin ceramic LCC surface mount device SMD - tape and reel 6-pin ceramic LCC SMD - tape and reel 6-pin ceramic LCC SMD - tape and reel 6-pin ceramic LCC SMD - tape and reel Product Flow Commercial, 0 °C to 70 °C Industrial, °C to 85 °C Industrial, °C to 85 °C Industrial, °C to 85 °C Some product offerings are factory-programmed customer-specific devices with customized part numbers. The Possible Configurations table shows the available device types, but not complete part numbers. Contact your local Cypress FAE or sales representative for more information. Possible Configurations Part Number[10] Configuration Pb-free CY2XF24LXCxxxT Factory-configured CY2XF24LXIxxxT Factory-configured Package Description 6-pin ceramic LCC SMD - tape and reel 6-pin ceramic LCC SMD - tape and reel Product Flow Commercial, 0 °C to 70 °C Industrial, °C to 85 °C Ordering Code Definitions CY 2XF24 F LX C/I XXX T Tape and Reel Custom part configuration code C = Commercial I = Industrial 6-pin LCC package Field programmable device Base part number Company ID CY = Cypress Notes Device configuration details are described in the Standard and Application-Specific Factory Configurations table on page “xxx” indicates factory programmed parts based on customer specific configuration. For more details, contact your local Cypress FAE or Sales Representative. Page 13 of 17 Package Drawings and Dimensions Figure 6-Pin x mm Ceramic LCC LZ06A CY2XF24 001-10044 *B Page 14 of 17 Acronyms Table Acronyms Used in this Document Acronym ESD FAE HBM JEDEC LCC LVDS OE PCB PLL RMS XO Description electrostatic discharge field application engineer human body model joint electron devices engineering council leadless chip carrier Low-voltage differential signaling output enable printed circuit board phase-locked loop root mean square crystal oscillator Document Conventions Units of Measure Symbol °C µs µA mA mm ms mV kHz MHz ns pF ps ppm V W % Unit of Measure degree Celsius microseconds microamperes milliamperes millimeter milliseconds millivolts kilohertz megahertz nanoseconds picofarads picoseconds parts per million volts watts percent ohms CY2XF24 Page 15 of 17 CY2XF24 Document History Page Document Title CY2XF24 High Performance LVPECL Oscillator with Frequency Margining I2C Control Document Number 001-53146 Orig. of Submission Change Description of Change 2704379 KVM/PYRS 05/11/09 New datasheet 2718898 WWZ 06/15/09 Minor ECN to post datasheet to external web 2761926 2896548 03/19/10 Moved parts with ‘xxx’ into new table, Possible Configurations Updated package diagram 2973338 07/08/10 Added Standard and Application-Specific Factory Configurations table on Added phase jitter specs for pre-defined configurations into the AC Electrical Specifications table note 8 refers users to the new table on page 2 for typical specs . Added CY2XF24LXI625T device to the Ordering Information table and added note 9 to reference the configuration description of the new device. Changed all references to CyberClocksOnline software to CyClockWizard. Removed section on phase noise vs jitter SW optimization. Changed description of Word Select feature from default Word 0 to user-defined. 3183855 BASH 05/06/11 Updated template as per current Cypress standards. Added Units table. Changed status from Preliminary to Final. 3373963 PURU 09/21/11 Updated Standard and Application-Specific Factory Configurations on page 4 and Package Drawings and Dimensions on page Added new MPN CY2XF24LXI009T. Page 16 of 17 CY2XF24 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 17 of 17

PDF Datasheet Preview

CY2XF24

High Performance LVPECL Oscillator with Frequency Margining I2C Control
• Low jitter crystal oscillator XO
• Less than 1 ps typical root mean square RMS phase jitter
• Differential low-voltage positive emitter coupled logic

LVPECL output
• Output frequency from 50 MHz to 690 MHz
• Frequency margining through I2C bus
• Factory-configured or field-programmable
• Integrated phase-locked loop PLL
• Pb-free package x mm leadless chip carrier LCC
• Supply voltage V or V
• Commercial and industrial temperature ranges

Functional Description

The CY2XF24 is a high-performance and high-frequency XO. It uses a Cypress-proprietary low-noise PLL to synthesize the frequency from an integrated crystal. The output frequency can be changed using the I2C bus serial interface, allowing easy frequency margin testing in applications.

The CY2XF24 is available as a factory-configured device or as a field-programmable device. Factory-configured devices are configured for general use see Standard and Application-Specific Factory Configurations or they can be customer specific.

Logic Block Diagram

CRYSTAL OSCILLATOR
1 SDA
2 SCL

I2C INTERFACE

LOW-NOISE PLL

PROGRAMMABLE CONFIGURATION

OUTPUT DIVIDER
4 CLK
5 CLK#
• San Jose, CA 95134-1709
• 408-943-2600

Pinouts

Figure Pin Diagram 6 Pin Ceramic LCC

SDA 1 SCLK 2

VSS 3
6 VDD 5 CLK# 4 CLK

Table Pin Definitions

Pin 1 2 4, 5 6 3

Name SDA SCLK CLK, CLK# VDD VSS

I/O Type I/O

CMOS input LVPECL output

Power

I2C serial data I2C serial clock Differential output clock Supply voltage V or V Ground

CY2XF24

Page 2 of 17

CY2XF24

Contents

Standard and Application-Specific Factory Configurations 4 Functional Description 4 Configuration Software 4 Programming Description 4

Field-Programmable CY2XF24F 4 Factory-Configured CY2XF24 5 Programming Variables 5 Output Frequencies 5 Industrial versus Commercial Device Performance 5 Memory Map 5 Serial Interface Protocol and Timing 5 Device Address 5 Data Valid 5 Data Frame 5 Acknowledge Pulse 6 Write Operations 6 Writing Individual Bytes 6 Writing Multiple Bytes 6 Read Operations 6 Current Address Read 6
Random Read 6 Sequential Read 6 Absolute Maximum Conditions 8 Operating Conditions 8 DC Electrical Characteristics 8 AC Electrical Characteristics 9 I2C Bus Timing Specifications 10 Typical Output Characteristics 10 Measurement Definitions 12 Termination Circuits 12 Ordering Information 13 Possible Configurations 13 Package Drawings and Dimensions 14 Acronyms 15 Document Conventions 15 Units of Measure 15 Document History Page 16 Sales, Solutions, and Legal Information 17 Worldwide Sales and Design Support 17 Products 17 PSoC Solutions 17

Page 3 of 17

CY2XF24

Standard and Application-Specific Factory Configurations

Part Number CY2XF24LXI625T

CY2XF24LXI009T

Output Frequency Word

MHz default
100 MHz default
350 MHz
400 MHz

RMS Phase Jitter Random

Offset Range

Jitter Typical

MHz to 20 MHz to 20 MHz to 20 MHz to 20 MHz
12 kHz to 20 MHz 12 kHz to 20 MHz 12 kHz to 20 MHz 12 kHz to 20 MHz

Functional Description

Figure Frequency Words

The CY2XF24 is a PLL-based high-performance clock generator. It uses an internal crystal oscillator as a reference, and outputs one differential LVPECL clock. It has an I2C bus serial interface[1], which is used to change the output frequency.

The CY2XF24 comes configured for four different frequencies. At power-on, the four configurations are transparently loaded into an internal volatile memory which, in turn, controls the PLL. You can switch between the four frequencies through the I2C bus. You can also configure the CY2XF24 with new output frequencies by shifting new data into the internal memory.

Frequency margining is a common application for this feature. One frequency is used for the standard operating mode of the device, while additional frequencies are available for margin testing, either during product development or in-system manufacturing test.

Note that all configuration changes made using I2C are temporary and are lost when power is removed from the device. At power-on, the device returns to its original state.

The configuration for a particular frequency is stored in a 6-byte block of memory, known as a word. The CY2XF24 has four such words, labeled ‘Frequency Word 0’ through ‘Frequency Word An additional register byte contains a 2-bit field, which selects one of the four frequency words. By writing to this Select Byte, you can switch back and forth between the four programmed frequencies. The select byte can be configured to select any of the four frequency words at power on.

When changing the output frequency, the frequency transition is not guaranteed to be smooth. There can be frequency excursions beyond the start frequency and the new frequency. Glitches and runt pulses are possible, and time must be allowed for the PLL to relock.

If more than four frequencies are needed, the I2C Bus can be used to change any of the four frequency words. When writing frequency words through I2C, you should not change the currently selected word. Instead, write one of the three unselected words before changing the select byte to select that new word.

Figure 2 shows how the frequency words are arranged and selected.

Register Address
10h 15h

Frequency Word 0
16h 1Bh 1Ch 21h

Frequency Word 1 Frequency Word 2

Control
22h 27h

Frequency Word 3

Select Byte

Bits [1:0]
11 Sel

Configuration Software

Cypress provides CyClockWizard software that enables users to create data values for shifting into the frequency words. This software is required because the algorithm is too complicated to be described here.

The user specifies the output frequency. The software then calculates the bit stream for up to four frequency words, as outlined by the register addresses for each word seen in Figure

Programming Description
Ordering Information

Part Number Pb-free CY2XF24FLXCT

Configuration Field-programmable

CY2XF24FLXIT CY2XF24LXI625T[9] CY2XF24LXI009T[9]

Field-programmable Factory-Configured Factory-Configured

Package Description
6-pin ceramic LCC surface mount device SMD - tape and reel 6-pin ceramic LCC SMD - tape and reel 6-pin ceramic LCC SMD - tape and reel 6-pin ceramic LCC SMD - tape and reel

Product Flow

Commercial, 0 °C to 70 °C

Industrial, °C to 85 °C Industrial, °C to 85 °C Industrial, °C to 85 °C

Some product offerings are factory-programmed customer-specific devices with customized part numbers. The Possible Configurations table shows the available device types, but not complete part numbers. Contact your local Cypress FAE or sales representative for more information.

Possible Configurations

Part Number[10]

Configuration

Pb-free

CY2XF24LXCxxxT

Factory-configured

CY2XF24LXIxxxT

Factory-configured

Package Description
6-pin ceramic LCC SMD - tape and reel 6-pin ceramic LCC SMD - tape and reel

Product Flow

Commercial, 0 °C to 70 °C Industrial, °C to 85 °C
Ordering Code Definitions

CY 2XF24 F LX C/I XXX T

Tape and Reel Custom part configuration code C = Commercial I = Industrial
6-pin LCC package

Field programmable device Base part number Company ID CY = Cypress

Notes Device configuration details are described in the Standard and Application-Specific Factory Configurations table on page “xxx” indicates factory programmed parts based on customer specific configuration. For more details, contact your local Cypress FAE or Sales Representative.

Page 13 of 17

Package Drawings and Dimensions

Figure 6-Pin x mm Ceramic LCC LZ06A

CY2XF24
001-10044 *B

Page 14 of 17

Acronyms

Table Acronyms Used in this Document

Acronym ESD FAE HBM JEDEC LCC LVDS OE PCB PLL RMS XO

Description electrostatic discharge field application engineer human body model joint electron devices engineering council leadless chip carrier Low-voltage differential signaling output enable printed circuit board phase-locked loop root mean square crystal oscillator

Document Conventions

Units of Measure

Symbol °C µs µA mA mm ms mV kHz MHz ns pF ps ppm V W %

Unit of Measure degree Celsius microseconds microamperes milliamperes millimeter milliseconds millivolts kilohertz megahertz nanoseconds picofarads picoseconds parts per million volts watts percent ohms

CY2XF24

Page 15 of 17

CY2XF24

Document History Page

Document Title CY2XF24 High Performance LVPECL Oscillator with Frequency Margining I2C Control Document Number 001-53146

Orig. of Submission

Change

Description of Change
2704379 KVM/PYRS 05/11/09 New datasheet
2718898 WWZ
06/15/09 Minor ECN to post datasheet to external web
2761926
2896548
03/19/10 Moved parts with ‘xxx’ into new table, Possible Configurations

Updated package diagram
2973338
07/08/10 Added Standard and Application-Specific Factory Configurations table on

Added phase jitter specs for pre-defined configurations into the AC Electrical

Specifications table note 8 refers users to the new table on page 2 for typical
specs .
Added CY2XF24LXI625T device to the Ordering Information table and added
note 9 to reference the configuration description of the new device.

Changed all references to CyberClocksOnline software to CyClockWizard.

Removed section on phase noise vs jitter SW optimization.

Changed description of Word Select feature from default Word 0 to
user-defined.
3183855 BASH
05/06/11 Updated template as per current Cypress standards.

Added Units table.

Changed status from Preliminary to Final.
3373963 PURU
09/21/11 Updated Standard and Application-Specific Factory Configurations on page 4
and Package Drawings and Dimensions on page

Added new MPN CY2XF24LXI009T.

Page 16 of 17

CY2XF24

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 17 of 17

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 CY2XF24FLXCT Datasheet file may be downloaded here without warranties.

Datasheet ID: CY2XF24FLXCT 507757