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IDT82V3010
T1/E1/OC3 Telecom Clock Generator with Dual Reference Inputs
Table Of Contents
3
Feberuary 20, 2009
TABLE OF CONTENTS
1
Pin Description...................................................................................................................................................................................................7
2
Functional Description ......................................................................................................................................................................................9
2.1
State Control Circuit ..................................................................................................................................................................................9
2.1.1
Normal Mode..............................................................................................................................................................................10
2.1.2
Fast Lock Mode..........................................................................................................................................................................10
2.1.3
Holdover Mode ...........................................................................................................................................................................10
2.1.4
Freerun Mode.............................................................................................................................................................................10
2.2
Frequency Select Circuit .........................................................................................................................................................................10
2.3
Reference Input Switch ...........................................................................................................................................................................10
2.4
Reference Input Monitor ..........................................................................................................................................................................11
2.5
Invalid Input Signal Detection ..................................................................................................................................................................11
2.6
TIE Control Block.....................................................................................................................................................................................11
2.7
DPLL Block..............................................................................................................................................................................................12
2.7.1
Phase Detector (PHD)................................................................................................................................................................12
2.7.2
Limiter.........................................................................................................................................................................................12
2.7.3
Loop Filter ..................................................................................................................................................................................13
2.7.4
Fraction Block.............................................................................................................................................................................13
2.7.5
Digital Control Oscillator (DCO)..................................................................................................................................................13
2.7.6
Lock Indicator .............................................................................................................................................................................13
2.7.7
Output Interface..........................................................................................................................................................................13
2.8
OSC.........................................................................................................................................................................................................14
2.8.1
Clock Oscillator ..........................................................................................................................................................................14
2.9
JTAG .......................................................................................................................................................................................................14
2.10 Reset, Lock and TIE Application .............................................................................................................................................................14
2.11 Power Supply Filtering Techniques .........................................................................................................................................................15
3
Measures of Performance ...............................................................................................................................................................................16
3.1
Intrinsic Jitter ...........................................................................................................................................................................................16
3.2
Jitter Tolerance........................................................................................................................................................................................16
3.3
Jitter Transfer ..........................................................................................................................................................................................16
3.4
Frequency Accuracy................................................................................................................................................................................16
3.5
Holdover Accuracy ..................................................................................................................................................................................16
3.6
Capture Range ........................................................................................................................................................................................16
3.7
Lock Range .............................................................................................................................................................................................16
3.8
Phase Slope ............................................................................................................................................................................................16
3.9
Time Interval Error (TIE)..........................................................................................................................................................................16
3.10 Maximum Time Interval Error (MTIE) ......................................................................................................................................................16
3.11 Phase Continuity .....................................................................................................................................................................................16
3.12 Phase Lock Time.....................................................................................................................................................................................17
4
Absolute Maximum Ratings ............................................................................................................................................................................18
5
Recommended DC Operating Conditions .....................................................................................................................................................18
6
DC Electrical Characteristics..........................................................................................................................................................................18
6.1
Single End Input/Output Port...................................................................................................................................................................18
6.2
Differential Output Port (LVDS) ...............................................................................................................................................................19
7
AC Electrical Characteristics..........................................................................................................................................................................20
7.1
Performance ............................................................................................................................................................................................20
7.2
Intrinsic Jitter Unfiltered ...........................................................................................................................................................................20
7.3
C1.5o (1.544 MHz) Intrinsic Jitter Filtered ...............................................................................................................................................21
7.4
C2o (2.048 MHz) Intrinsic Jitter Filtered ..................................................................................................................................................21
7.5
C19o (19.44 MHz) Intrinsic Jitter Filtered ................................................................................................................................................21
7.6
8 kHz Input to 8 kHz Output Jitter Transfer .............................................................................................................................................21
7.7
1.544 MHz Input to 1.544 MHz Output Jitter Transfer.............................................................................................................................22
7.8
2.048 MHz Input to 2.048 MHz Output Jitter Transfer.............................................................................................................................22
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