Table Of Contents

3

February 6, 2009

TABLE OF CONTENTS

1

Pin Description...................................................................................................................................................................................................7

2

Functional Description ....................................................................................................................................................................................10

2.1

State Control Circuit ................................................................................................................................................................................10

2.1.1

Normal Mode..............................................................................................................................................................................11

2.1.2

Fast Lock Mode..........................................................................................................................................................................11

2.1.3

Holdover Mode ...........................................................................................................................................................................11

2.1.4

Freerun Mode.............................................................................................................................................................................11

2.2

Frequency Select Circuit .........................................................................................................................................................................11

2.3

Reference Input Switch ...........................................................................................................................................................................11

2.4

Reference Input Monitor ..........................................................................................................................................................................12

2.5

Invalid Input Signal Detection ..................................................................................................................................................................12

2.6

TIE Control Block.....................................................................................................................................................................................12

2.7

DPLL Block..............................................................................................................................................................................................13

2.7.1

Phase Detector (PHD)................................................................................................................................................................13

2.7.2

Limiter.........................................................................................................................................................................................13

2.7.3

Loop Filter ..................................................................................................................................................................................14

2.7.4

Fraction Block.............................................................................................................................................................................14

2.7.5

Digital Control Oscillator (DCO)..................................................................................................................................................14

2.7.6

Lock Indicator .............................................................................................................................................................................14

2.7.7

Output Interface..........................................................................................................................................................................14

2.8

OSC.........................................................................................................................................................................................................15

2.8.1

Clock Oscillator ..........................................................................................................................................................................15

2.9

JTAG .......................................................................................................................................................................................................15

2.10 Reset, Lock and TIE Application .............................................................................................................................................................15

2.11 Power Supply Filtering Techniques .........................................................................................................................................................16

3

Measures of Performance ...............................................................................................................................................................................17

3.1

Intrinsic Jitter ...........................................................................................................................................................................................17

3.2

Jitter Tolerance........................................................................................................................................................................................17

3.3

Jitter Transfer ..........................................................................................................................................................................................17

3.4

Frequency Accuracy................................................................................................................................................................................17

3.5

Holdover Accuracy ..................................................................................................................................................................................17

3.6

Capture Range ........................................................................................................................................................................................17

3.7

Lock Range .............................................................................................................................................................................................17

3.8

Phase Slope ............................................................................................................................................................................................17

3.9

Time Interval Error (TIE)..........................................................................................................................................................................17

3.10 Maximum Time Interval Error (MTIE) ......................................................................................................................................................17

3.11 Phase Continuity .....................................................................................................................................................................................18

3.12 Phase Lock Time.....................................................................................................................................................................................18

4

Absolute Maximum Ratings ............................................................................................................................................................................19

5

Recommended DC Operating Conditions .....................................................................................................................................................19

6

DC Electrical Characteristics..........................................................................................................................................................................19

6.1

Single End Input/Output Port...................................................................................................................................................................19

6.2

Differential Output Port (LVDS) ...............................................................................................................................................................20

7

AC Electrical Characteristics.........................................................................................................................................................................21

7.1

Performance ............................................................................................................................................................................................21

7.2

Intrinsic Jitter Unfiltered ...........................................................................................................................................................................22

7.3

C1.5o (1.544 MHz) Intrinsic Jitter Filtered ...............................................................................................................................................22

7.4

C2o (2.048 MHz) Intrinsic Jitter Filtered ..................................................................................................................................................22

7.5

C19o (19.44 MHz) Intrinsic Jitter Filtered ................................................................................................................................................22

7.6

8 kHz Input to 8 kHz Output Jitter Transfer .............................................................................................................................................23

7.7

1.544 MHz Input to 1.544 MHz Output Jitter Transfer.............................................................................................................................23

7.8

2.048 MHz Input to 2.048 MHz Output Jitter Transfer.............................................................................................................................23