PI6C6612 3.3V Precision Audio Clock Synthesizer Features Description Precision clock generator for digital audio application The PI6C6612 is a precision clock generator designed to provide synchronous clock signals for digital audio applications with One copy of Reference clock at 27 MHz sampling clock rates derived from an MPEG stream. The device Supports various audio sampling rates: 128x, 256x, 384x, can also be used as a standalone clock source with a 27 MHz 512x and 768x crystal. Support Crystal or Reference clock signal input Split power supply pins and ground pins help to provide excel- Low Phase Noise: -75 dBc 100Hz lent phase noise and long term jitter performance for superior Low Short Term Jitter: 175ps (typical) synchronization and Signal-to-Noise ratio. Low Long Term Jitter: 1.1ns (typical) PI6C6612 is one example of Pericoms multimedia clock prod- Industrial Temperature Range (-40C ~ +85C) ucts, if you have other applications for custom clock designs, Packaging (Pb-Free & Green): either with different clock input or output that is not speci ed 16-pin TSSOP here, please contact Pericom. Block Diagram Output Clock Selection Table from 27 MHz input S3 S2 S1 S0 Clock (MHz) 0 0 0 0 8.192 REF 0 0 0 1 11.2896 XTAL X2 OSC 0 0 1 0 12.288 X1/REFIN Clock 0 0 1 1 24.576 PLL 0 1 0 0 9.216 SELIN 0 1 0 1 16.9344 0 1 1 0 18.432 S 3:0 0 1 1 1 36.864 1 0 0 0 16.384 1 0 0 1 22.5792 1 0 1 0 5.6448 1 0 1 1 49.152 1 1 0 0 6.1440 1 1 0 1 33.8688 1 1 1 0 8.4672 1 1 1 1 73.728 08-0298 PS8794C 11/12/08 1PI6C6612 3.3V Precision Audio Clock Synthesizer Pin Assignment 1 16 X1REFIN X2 VDD 2 15 REF VDD 3 14 VDD S0* 4 13 GND GND 5 12 SELIN* 6 11 GND VDD 7 10 S3* S1* S2* 8 9 Clock *Internal Pull-Up Pin Description Pin Name Pin No I/O Type Pin Description X1/REF 1 I Crystal or Reference clock input. SeeRecommended Crystal Speci cation for details. IN V 2, 3, 11, 14 Power Power supply DD S * 4 I Output clock selection 0 GND 5, 6, 13 Ground Ground S * 7 I Output clock selection 3 S * 8 I Output clock selection 2 Clock 9 O Clock output S * 10 I Output clock selection 1 SELIN* 12 I Input clock selection. Low: reference clock input High: crystal clock input REF 15 O Reference clock input X 16 I Crystal clock input leave open if SELIN=Low 2 * Internally Pulled High 08-0298 PS8794C 11/12/08 2