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Table of Contents
3
February 20, 2009
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 ...........................................................................................................................................................................12
2.4
Reference Input Monitor ..........................................................................................................................................................................12
2.5
Invalid Input Signal Detection ..................................................................................................................................................................12
2.6
TIE Control Block.....................................................................................................................................................................................12
2.7
DPLL Block..............................................................................................................................................................................................14
2.7.1
Phase Detector (PHD)................................................................................................................................................................14
2.7.2
Limiter.........................................................................................................................................................................................14
2.7.3
Loop Filter ..................................................................................................................................................................................15
2.7.4
Fraction Block.............................................................................................................................................................................15
2.7.5
Digital Control Oscillator (DCO)..................................................................................................................................................15
2.7.6
Lock Indicator .............................................................................................................................................................................15
2.7.7
Output Interface..........................................................................................................................................................................15
2.8
OSC.........................................................................................................................................................................................................16
2.8.1
Clock Oscillator ..........................................................................................................................................................................16
2.9
JTAG .......................................................................................................................................................................................................16
2.10 Reset Circuit ............................................................................................................................................................................................16
2.11 Power Supply Filtering Techniques .........................................................................................................................................................17
3
Measures of Performance ...............................................................................................................................................................................18
3.1
Intrinsic Jitter ...........................................................................................................................................................................................18
3.2
Jitter Tolerance........................................................................................................................................................................................18
3.3
Jitter Transfer ..........................................................................................................................................................................................18
3.4
Frequency Accuracy................................................................................................................................................................................18
3.5
Holdover Accuracy ..................................................................................................................................................................................18
3.6
Capture Range ........................................................................................................................................................................................18
3.7
Lock Range .............................................................................................................................................................................................18
3.8
Phase Slope ............................................................................................................................................................................................18
3.9
Time Interval Error (TIE)..........................................................................................................................................................................18
3.10 Maximum Time Interval Error (MTIE) ......................................................................................................................................................19
3.11 Phase Continuity .....................................................................................................................................................................................19
3.12 Phase Lock Time.....................................................................................................................................................................................19
4
Absolute Maximum Ratings ............................................................................................................................................................................20
5
Recommended DC Operating Conditions .....................................................................................................................................................20
6
DC Electrical Characteristics..........................................................................................................................................................................20
6.1
Single End Input/Output Port...................................................................................................................................................................20
6.2
Differential Output Port (LVDS) ...............................................................................................................................................................21
7
AC Electrical Characteristics.........................................................................................................................................................................22
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