ICS661

PRECISION AUDIO CLOCK SOURCE DATASHEET ICS661 Description The ICS661 provides synchronous clock generation for audio sampling clock rates derived from an MPEG stream, or can be used as a standalone clock source with a 27 MHz crystal. The device uses the latest PLL technology to provide excellent phase noise and long term jitter performance for superior synchronization and S/N ratio. Please contact IDT if you have a requirement for an input and output frequency not included here - we can rapidly modify this product to meet special requirements. Features Packaged in 16-pin TSSOP Pb (lead) free package, RoHS compliant Clock or crystal input Low phase noise Low jitter Exact (0 ppm) multiplication ratios Reference clock output available Support for 256, 384, 512, and 768 times sampling rate Block Diagram VDD (P2) VDD (P3) VDDO VDDR X2 X1/REFIN SELIN S3:0 4 Crystal Oscillator REF GND (P13) PLL Clock Synthesis GND (P6) GND (P5) CLK IDT™ / ICS™ PRECISION AUDIO CLOCK SOURCE 1 ICS661 REV F 051310 ICS661 PRECISION AUDIO CLOCK SOURCE CLOCK SYNTHESIZER Pin Assignment X1/REFIN VDD VDD S0 GND GND S3 S2 1 2 3 4 5 6 7 8 16 X2 15 REF 14 VDDR 13 GND 12 SELIN 11 VDDO 10 S1 9 CLK 16-pin 4.40 mil body, 0.50 mm pitch TSSOP Pin Descriptions Output Clock Selection Table Input Output S3 S2 S1 S0 Frequency Frequency (MHz) (MHz) 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 ...