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CDCE925, CDCEL925

SCAS847I – JULY 2007 – REVISED OCTOBER 2016

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Product Folder Links: CDCE925 CDCEL925

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Copyright © 2007–2016, Texas Instruments Incorporated

Table of Contents

1

Features .................................................................. 1

2

Applications ........................................................... 1

3

Description ............................................................. 1

4

Revision History..................................................... 2

5

Description (continued)......................................... 4

6

Pin Configuration and Functions ......................... 4

7

Specifications......................................................... 5

7.1

Absolute Maximum Ratings ...................................... 5

7.2

ESD Ratings.............................................................. 5

7.3

Recommended Operating Conditions ....................... 5

7.4

Thermal Information .................................................. 6

7.5

Electrical Characteristics .......................................... 6

7.6

EEPROM Specification ............................................. 8

7.7

Timing Requirements: CLK_IN ................................. 8

7.8

Timing Requirements: SDA/SCL .............................. 8

7.9

Typical Characteristics ............................................ 10

8

Parameter Measurement Information ................ 11

9

Detailed Description ............................................ 12

9.1

Overview ................................................................. 12

9.2

Functional Block Diagram ....................................... 13

9.3

Feature Description................................................. 13

9.4

Device Functional Modes........................................ 16

9.5

Programming........................................................... 17

9.6

Register Maps ......................................................... 18

10

Application and Implementation........................ 24

10.1

Application Information.......................................... 24

10.2

Typical Application ................................................ 24

11

Power Supply Recommendations ..................... 28

12

Layout................................................................... 28

12.1

Layout Guidelines ................................................. 28

12.2

Layout Example .................................................... 29

13

Device and Documentation Support ................. 30

13.1

Device Support...................................................... 30

13.2

Documentation Support ........................................ 30

13.3

Related Links ........................................................ 30

13.4

Receiving Notification of Documentation Updates 30

13.5

Community Resources.......................................... 30

13.6

Trademarks ........................................................... 30

13.7

Electrostatic Discharge Caution ............................ 31

13.8

Glossary ................................................................ 31

14

Mechanical, Packaging, and Orderable

Information ........................................................... 31

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision H (August 2016) to Revision I

Page

•

Changed data sheet title from: CDCEx925 Programmable 2-PLL VCXO Clock Synthesizer With 1.8-V, 2.5-V, 3.3-V

LVCMOS Outputs to: CDCE(L)925: Flexible Low Power LVCMOS Clock Generator With SSC Support for EMI

Reduction................................................................................................................................................................................ 1

Changes from Revision G (November 2011) to Revision H

Page

•

Added Device Information table, ESD Ratings table, Feature Description section, Device Functional Modes,

Application and Implementation section, Power Supply Recommendations section, Layout section, Device and

Documentation Support section, and Mechanical, Packaging, and Orderable Information section....................................... 1

•

Changed RθJB from 64°C/W : to 63.63°C/W ........................................................................................................................... 6

•

Changed ψJT from 1.0°C/W : to 1.01°C/W.............................................................................................................................. 6

•

Added ψJB parameter to Thermal Information table................................................................................................................ 6

•

Deleted figure ....................................................................................................................................................................... 20

Changes from Revision F (March 2010) to Revision G

Page

•

Changed in Figure 9, second S to Sr ................................................................................................................................... 18

•

Changed under second where page 21 from N

′ = N × 2

PN ≥ M100 MHz ≤ ƒ

VCO ≤ 200 MHz; TO 3 lines with last line

being changed to 80 MHz

≤ ƒVCO ≤ 230 MHz and 0 ≤ p ≤ 7 changed to 0 ≤ p ≤ 4.............................................................. 26