MK2704

PRELIMINARY INFORMATION I C R O C LOC K Description The MK2704 is a low cost, low jitter, high performance PLL clock synthesizer designed to replace oscillators and PLL circuits in set-top box and multimedia systems. Using our patented analog Phase-Locked Loop (PLL) techniques, the device uses a fundamental 27 MHz crystal or clock input to produce a buffered reference clock and a selectable audio clock. The audio clock is frequency locked to the 27 MHz clock, assuring that the audio with zero ppm error and video will always track perfectly. MK2704 PLL Audio Clock Synthesizer Features Packaged in 8 pin SOIC Uses an inexpensive fundamental crystal, or clock Output clocks of 16.9344 MHz, 18.432 MHz, and 36.864 MHz Supports 384x MPEG sampling rates of 44.1 kHz, 48 kHz and 96 kHz Patented zero ppm synthesis error in all clocks All frequencies are frequency locked Advanced, low power, sub-micron CMOS process 3.3 V or 5 V operating voltage Block Diagram VDD GND S1:0 2 PLL Clock Synthesis and Control Circuitry Crystal Oscillator Output Buffer CLK 27 MHz crystal or clock X1 Output Buffer 27.000 MHz X2 (Capacitors are required for crystal tuning) MDS 2704 A 1 Revision 062700 Integrated Circuit Systems, Inc. 525 Race Street San Jose CA95126(408) 295-9800tel www.icst.com PRELIMINARY INFORMATION I C R O C LOC K Pin Assignment MK2704 PLL Audio Clock Synthesizer Audio Clock Output Select Table (MHz) S1 0 0 1 1 Key: S0 0 1 0 1 CLK 36.864 Test 16....