ICS650R-11B

( DataSheet : www.DataSheet4U.com ) PRELIMINARY INFORMATION ICS650-11B BroadCom Networking Clock Synthesizer Features Packaged in 20 pin narrow SSOP (Pb free available) 25.00 MHz fundamental crystal or clock input Five fixed output clocks of 25.0 MHz, 33.33 MHz, 66.66 MHz, 100.0 MHz, and 133.33 MHz Zero ppm synthesis error in all clocks Ideal for BroadCom BCM5600/BCM5400 chipset Full CMOS output swing Advanced, low power, sub-micron CMOS process 3.0V to 5.5V operating voltage Industrial temperature range Description The ICS650-11B is a low cost, low jitter, high performance clock synthesizer customized for BroadCom. Using analog Phase-Locked Loop (PLL) techniques, the device accepts a 25.0 MHz clock or fundamental mode crystal input to produce multiple output clocks of 25.0 MHz, 33.33 MHz, 66.66 MHz, 100.0 MHz, and 133.33 MHz. All output clocks are frequency locked together. The ICS650-11B outputs all have 0 ppm synthesis error. Block Diagram VDD GND 3 5 Output Buffer Output Buffer Output Buffer Output Buffer 33.33 MHz 66.66 MHz 100.0 MHz 133.33 MHz Clock Synthesis and Control Circuitry 25.00 MHz crystal or clock X1 Clock Buffer/ Crystal Oscillator Output Buffer 25.00 MHz X2 Optional crystal capacitors are shown and may be required for tuning of initial accuracy (determined once per board). 1 Revision 012005 Printed 11/14/04 Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126(408)295-9800tel www.icst.com MDS 650-11B C ...