82V3155 Datasheet, PDF (3/34 Pages) Integrated Device Technology – ENHANCED T1/E1/OC3 WAN PLL WITH DUAL REFERENCE INPUTS

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 ...........................................................................................................................................................................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
Table of Contents
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January 11, 2017