ICS ICS426
The ICS426 was developed for serial ATA (SATA) and fiber channel. It generates a high quality, high frequency clock output from a low cost frequency crystal or clock input. q 2 525 Race Street, San Jose, CA 95126 q Revision 091102 tel (408) 295-9800 q ICS426 Serial ATA/Fibre Channel Clock Synthesizer External Components Decoupling Capacitor As with any high performance mixed-signal IC, the ICS426 must be isolated from system power supply noise to perform optimally.FEATURES
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● Packaged in 16 pin TSSOP Input crystal or clock frequency of 25 MHz (typical) Supports serial ATA Generation 1 Supports Fiber Channel Duty cycle of 45/55 Operating voltage of 3.3V Advanced, low power, CMOS process
DESCRIPTION
Using Phase-Locked-Loop (PLL) techniques, the device runs from a standard fundamental mode, inexpensive crystal or clock input. Block Diagram VDD 4 S0:S1 X1 Crystal Oscillator X2 25 MHz Crystal or Clock Input PLL /Clock Synthesis Circuitry CLK Capacitors may be required with a crystal input. 6 GND OE MDS 426 B Integrated Circuit Systems, Inc. q 1 525 Race Street, San Jose, CA 95126 q Revision 091102 tel (408) 295-9800 q ICS426 Serial ATA/Fibre Channel Clock Synthesizer Pin Assignment X1/ICLK VDD VDD GND GND S1 VDD CLK 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 X2 GND GND OE GND S0 VDD GND Clock Output Select Table (MHz) S1 0 0 1 1 S0 0 1 0 1 Input 25 25 25 25 CLK Output 75 150 106.25 156.25 16 pin 173 mil (0.65 mm) TSSOP Pin Descriptions Pin Num...