ICS650G-40

DATASHEET ICS650-40 ETHERNET SWITCH CLOCK SOURCE Description Features The ICS650-40 is a clock chip designed for use in Ethernet Switch applications. Using IDT’ patented Phase-Locked Loop (PLL) techniques, the device takes a 25 MHz crystal input and produces various output clock frequencies as listed in Output Select Table. • • • • • • • Packaged in 16-pin TSSOP Available in Pb (lead) free package Operating voltage of 3.3 V Low power consumption Input frequency of 25 MHz Low long-term jitter 2.5 V to 3.3 V clock outputs NOTE: EOL for non-green parts to occur on 5/13/10 per PDN U-09-01 Block Diagram VDD 3 S1:S0 2 VDDOA Control Logic CLKA Phase Lock Loop CLKB X1/ICLK 25 MHz crystal or clock X2 Clock Buffer/ Crystal Oscillator Optional tuning crystal capacitors IDT™ / ICS™ ETHERNET SWITCH CLOCK SOURCE 4 GND 1 OE VDDOB ICS650-40 REV D 102709 ICS650-40 ETHERNET SWITCH CLOCK SOURCE CLOCK SYNTHESIZER Pin Assignment Output Select Table (MHz) X1/ICLK 1 16 X2 VDD 2 15 GND GND 3 14 OE VDDOA 4 13 GND CLKA 5 12 VDD CLKB 6 11 VDD VDDOB 7 10 S1 GND 8 9 S0 S1 S0 CLKA (MHz) CLKB (MHz) 0 0 127 127 0 1 133 133 1 0 157 157 1 1 189 189 16-pin (173 mil) TSSOP Pin Descriptions Pin Number Pin Name Pin Type Pin Description 1 X1/ICLK Input Crystal or clock input. Connect to a 25 MHz crystal or single ended clock. 2 VDD Power Connect to +3.3 V. 3 GND Power Connect to ground. 4 VDDOA Power Connect to +2.5 V or +3.3 V. For clock output buffer A only. 5 CLKA Output Clock A output with weak pull-down resistor. 6 CLKB Output Clock B output with weak pull-down resistor. 7 VDDOB Power Connect to +2.5 V or +3.3 V. For clock output buffer B only. 8 GND Power Connect to ground. 9 S0 Input Select pin 0. 10 S1 Input Select pin 1. 11 VDD Power Connect to +3.3 V. 12 VDD Power Connect to +3.3 V. 13 GND Power Connect to ground. 14 OE Input Output enable tri-states outputs and device is not shut down. Internal pull-up resistor. 15 GND Power Connect to ground. 16 X2 Output Crystal connection. Leave unconnected for clock input. IDT™ / ICS™ ETHERNET SWITCH CLOCK SOURCE 2 ICS650-40 REV D 102709 ICS650-40 ETHERNET SWITCH CLOCK SOURCE CLOCK SYNTHESIZER External Components A minimum number of external components are required for proper operation. Decoupling capacitors of 0.01 µF should be connected between VDD and GND pairs. The capacitors should be placed between pins VDD and GND, and VDDO and GND, as close to the device as possible. A 33Ω series terminating resistor should be used on each clock output if the trace is longer than 1 inch. A 25 MHz fundamental mode parallel resonant crystal should be used with CL=18 pF. On chip capacitors. On Chip capacitors are used for a 18 pF load crystal. Small 2 to 3 pf trimming capacitors are used from pins X1 to ground and X2 to ground to optimize the initial accuracy. Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS650-40. These ratings, which are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical parameters are guaranteed only over the recommended operating temperature range. Item Rating Supply Voltage, VDD 7V All Inputs and Outputs -0.5 V to VDD+0.5 V Ambient Operating Temperature 0 to +70° C Storage Temperature -65 to +150° C Junction Temperature 125° C Soldering Temperature 260° C Recommended Operation Conditions Parameter Min. Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) IDT™ / ICS™ ETHERNET SWITCH CLOCK SOURCE 3 Typ. Max. Units 0 +70 °C +3.15 +3.45 V ICS650-40 REV D 102709 ICS650-40 ETHERNET SWITCH CLOCK SOURCE CLOCK SYNTHESIZER DC Electrical Characteristics Unless otherwise specified, VDD=3.3 V ±5%, Ambient Temperature 0 to +70° C Parameter Operating Voltage Symbol Conditions Min. Typ. Max. Units VDD 3.15 3.45 V Output Operating Voltage VDDOA, B 2.375 3.45 V Input High Voltage, ICLK VIH Note 1 Input Low Voltage, ICLK VIL Note 1 Input High Voltage, S1:S0:OE VIH Input Low Voltage, S1:S0:OE VIL Output High Voltage VOH IOH = -12 mA Output Low Voltage VOL IOL = 12 mA Operating Supply Current IDD No load 40 mA No load 16 mA Each output ±35 mA IDD at Output Disable Condition(OE low) Short Circuit Current IOS VDD/2+0.5 V VDD/2-0.5 V VDD V 0.4 V 2 2 V 0.4 V Internal Pull-up Resistor RPUP OE pin 250 kΩ Internal Pull-down Resistor RPD CLK outputs 525 kΩ Note: 1. Nominal switching threshold is VDD/2. AC Electrical Characteristics , VDD = 3.3 V ±5%, VDDO = 2.5 - 3.3 V ±5%, CL=10 pF Ambient Temperature 0 to +70° C Parameter Symbol Conditions Min. Input Frequency Typ. Max. Units 25 MHz Output Rise Time tOR 20% to 80% of VDD 1.6 ns Output Fall Time tOF 80% to 20% of VDD 1.6 ns Output Clock Duty Cycle at VDD/2 Frequency Error all clocks 40 49-51 0 Output to Output Skew between clocks of the same frequency Absolute Jitter, Short-term P-P variation from mean Absolute Jitter, Short-term C-C Long-term Jitter IDT™ / ICS™ ETHERNET SWITCH CLOCK SOURCE 1000 clock cycles 4 60 % ppm 250 ps ±100 ±200 ps 200 400 ps 250 400 ps ICS650-40 REV D 102709 ICS650-40 ETHERNET SWITCH CLOCK SOURCE CLOCK SYNTHESIZER Thermal Characteristics (16-pin TSSOP) Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case Symbol Typ. Max. Units Still air 78 ° C/W θ JA 1 m/s air flow 70 ° C/W θ JA 3 m/s air flow 68 ° C/W 37 ° C/W θ JC Marking Diagram 16 9 9 ICS 650G40LF ICS 650G-40 ###### YYWW ###### YYWW 1 Min. θ JA Marking Diagram 16 Conditions 1 8 8 Notes: 1. ###### is the lot code. 2. YYWW is the last two digits of the year, and the week number that the part was assembled. 3. “LF” designates Pb (lead ) free package. 4. Bottom marking: (origin). Origin = country of origin if not USA. IDT™ / ICS™ ETHERNET SWITCH CLOCK SOURCE 5 ICS650-40 REV D 102709 ICS650-40 ETHERNET SWITCH CLOCK SOURCE CLOCK SYNTHESIZER Package Outline and Package Dimensions (16-pin TSSOP, 173 Mil. Narrow Body) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters 16 Symbol Index Area E1 E IN D EX AR EA 1 Pin 1 E H Max -- 1.20 -- 0.047 0.05 0.15 0.002 0.006 A2 0.80 1.05 0.032 0.041 b 0.19 0.30 0.007 0.012 C 0.09 0.20 0.0035 0.008 D 4.90 5.1 0.193 0.201 6.40 BASIC 4.30 e A 2 Min A E1 DD Max A1 E 2 Min Inches 0.252 BASIC 4.50 0.169 0.65 Basic 0.177 0.0256 Basic L 0.45 0.75 0.018 0.030 α 0° 8° 0° 8° aaa -- 0.10 -- 0.004 A A 1 c A -C - a c e e b b S E A T IN G P LA N E L L aaa C Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature 650G-40* See Page 6 Tubes 16-pin TSSOP 0 to +70° C Tape and Reel 16-pin TSSOP 0 to +70° C Tubes 16-pin TSSOP 0 to +70° C Tape and Reel 16-pin TSSOP 0 to +70° C 650G-40T* 650G-40LF See Page 6 650G-40LFT *NOTE: EOL for non-green parts to occur on 5/13/10 per PDN U-09-01 Parts that are ordered with a "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) 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 IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. IDT™ / ICS™ ETHERNET SWITCH CLOCK SOURCE 6 ICS650-40 REV D 102709 ICS650-40 ETHERNET SWITCH CLOCK SOURCE CLOCK SYNTHESIZER Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales For Tech Support 800-345-7015 408-284-8200 Fax: 408-284-2775 www.idt.com/go/clockhelp Corporate Headquarters Integrated Device Technology, Inc. www.idt.com © 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA