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| 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 PRELIMINARY INFORMATION ICS650-11B BroadCom Networking Clock Synthesizer Pin Assignment GND X2 X1 VDD GND GND DC DC DC 100M 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 DC DC 133.33M 33.33M VDD VDD GND 25M 66.66M GND 20 pin (150 mil) SSOP Pin Descriptions Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name GND X2 X1 VDD GND GND DC DC DC 100M GND 66.66M 25M GND VDD VDD 33.33M 133.33M DC DC Type P XO XI P P P O P O O P P P O O Description Connect to ground. Crystal connection. Connect to 25 MHz crystal or leave unconnected for a clock input. Crystal connection. Connect to 25 MHz fundamental crystal or clock input. Connect to +3.3 V or +5 V. Must be same as other VDDs. Connect to ground. Connect to ground. Don't Connect. Do not connect anything to this pin. Don't Connect. Do not connect anything to this pin. Don't Connect. Do not connect anything to this pin. 100.0 MHz clock output. Connect to ground. 66.66 MHz clock output. 25.0 MHz clock output. Connect to ground. Connect to +3.3V or +5V. Must be same as other VDDs. Connect to +3.3 V or +5 V. Must be same as other VDDs. 33.33 MHz clock output. 133.33 MHz clock output. Don't Connect. Do not connect anything to this pin. Don't Connect. Do not connect an thing to this pin. Key: XI, XO = crystal connections; O = Output; P = power supply connection 2 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 PRELIMINARY INFORMATION ICS650-11B BroadCom Networking Clock Synthesizer Conditions Referenced to GND Referenced to GND Max of 20 seconds -65 3 VDD/2 + 1 IOH=-12mA IOL=12mA IOH=-8mA No Load Each output 2.4 0.4 VDD-0.4 35 50 25.000 0.8 to 2.0V 2.0 to 0.8V At VDD/2 All clocks Variation from mean 1.5 1.5 55 0 Minimum Typical Maximum 7 VDD+0.5 85 260 150 5.5 VDD/2 VDD/2 VDD/2 - 1 Units V V C C C V V V V V V mA mA MHz ns ns % ppm ps Electrical Specifications Parameter Supply voltage, VDD Inputs and Clock Outputs Ambient Operating Temperature Soldering Temperature Storage temperature Operating Voltage, VDD Input High Voltage, VIH, X1 pin only Input Low Voltage, VIL, X1 pin only Output High Voltage, VOH Output Low Voltage, VOL Output High Voltage, VOH, CMOS level Operating Supply Current, IDD Short Circuit Current Input Frequency Output Clock Rise Time Output Clock Fall Time Output Clock Duty Cycle, except 25 MHz Frequency error Absolute Jitter, short term Notes: ABSOLUTE MAXIMUM RATINGS (note 1) n -0.5 -40 DC CHARACTERISTICS (VDD = 3.3V unless noted) V AC CHARACTERISTICS (VDD = 3.3V unless noted) V 45 50 175 1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability. External Components The ICS650-11B requires a minimum number of external components for proper operation. Decoupling capacitors of 0.01F should be connected between each VDD and GND on Pins 4 and 6, and Pins 16 and 14, as close to the ICS650-11B as possible. A series termination resistor of 33 may be used for each clock output. The 25.00 MHz crystal must be connected as close to the chip as possible. The crystal should be a fundamental mode (do not use third overtone), parallel resonant. Crystal capacitors should be connected from pins X1 to ground and X2 to ground to optimize the initial accuracy. The value of these capacitors is given by the following equation, where CL is the crystal load capacitance: Crystal caps (pF) = (CL-6) x 2. So for a crystal with 16 pF load capacitance, two 20 pF caps should be used. 3 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 PRELIMINARY INFORMATION ICS650-11B BroadCom Networking Clock Synthesizer Package Outline and Package Dimensions (For current dimensional specifications, see JEDEC Publication No. 95.) 20 pin SSOP Symbol A A1 b c D e E E1 L Inches e Min Max 0.053 0.069 0.004 0.010 0.008 0.012 0.007 0.010 0.337 0.344 .025 BSC S 0.228 0.244 0.150 0.157 0.016 0.050 Millimeters m Min Max 1.35 1.75 0.102 0.254 0.203 0.305 0.191 0.254 8.560 8.738 0.635 BSC 5.791 6.198 3.810 3.988 0.406 1.270 E1 E D A1 e b c A L Ordering Information Part/Order Number ICS650R-11I ICS650R-11IT Marking ICS650R-11I ICS650R-11I Shipping packaging tubes tape and reel Package 20 pin SSOP 20 pin SSOP Temperature -40 to +85C -40 to +85C While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Inc (ICS) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments. ICS650R-11ILF ICS650R-11ILF ICS650R-11ILF tubes tape and reel 20 pin SSOP 20 pin SSOP -40 to +85C -40 to +85C ICS650R-11ILFT 4 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 |
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