DATASHEET ICS524 LOW SKEW 1 TO 4 CLOCK BUFFER Description Features The ICS524 is a low skew, single input to four output, clock buffer. Part of ICS' ClockBlocksTM family, this is our lowest skew, small clock buffer. * * * * * * * * See the ICS552-02 for a 1 to 8 low skew buffer. For more than eight outputs, see the MK74CBxxx BuffaloTM series of clock drivers. ICS makes many non-PLL and PLL based low skew output devices as well as Zero Delay Buffers to synchronize clocks. Contact us for all of your clocking needs. Extremely low skew outputs (50 ps maximum) Packaged in 8-pin SOIC Available in Pb (lead) free package Low power CMOS technology Operating voltages of 2.5 V to 5 V Output Enable pin tri-states outputs 5 V tolerant input clock Industrial temperature range Block Diagram Q0 Q1 ICLK Q2 Q3 IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 1 ICS524 REV A 101705 ICS524 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Pin Assignment ICLK 1 8 GND Q0 2 7 Q3 Q1 3 6 Q2 NC 4 5 VDD 8-pin SOIC Pin Descriptions Pin Pin Number Name Pin Type Pin Description 1 ICLK Input Clock input, 5V tolerant input. 2 Q0 Output Clock output 0. 3 Q1 Output Clock output 1. 4 NC - Do not connect this pin to anything. 5 VDD Power Connect to +2.5 V, +3.3 V or +5.0 V. 6 Q2 Output Clock Output 2. 7 Q3 Output Clock Output 3. 8 GND Power Connect to ground. External Components A minimum number of external components are required for proper operation. A decoupling capacitor of 0.01 F should be connected between VDD on pin 5 and GND on pin 8, as close to the device as possible. A 33 series terminating resistor may be used on each clock output if the trace is longer than 1 inch. To achieve the low output skew that the ICS524 is capable of, careful attention must be paid to board layout. Essentially, all four outputs must have identical terminations, identical loads and identical trace geometries. If they do not, the output skew will be degraded. For example, using a 30 series termination on one output (with 33 on the others) will cause at least 15 ps of skew. IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 2 ICS524 REV A 101705 ICS524 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS524. These ratings, which are standard values for ICS 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 Output Enable and All Outputs -0.5 V to VDD+0.5 V ICLK -0.5 V to 5.5 V Ambient Operating Temperature -40 to +85C Storage Temperature -65 to +150C Junction Temperature 125C Soldering Temperature 260C Recommended Operation Conditions Parameter Min. Max. Units -40 +85 C +2.375 +5.25 V Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) Typ. DC Electrical Characteristics VDD=2.5 V 5%, Ambient temperature -40 to +85C, unless stated otherwise Parameter Operating Voltage Symbol Conditions VDD Input High Voltage, ICLK VIH Note 1 Input Low Voltage, ICLK VIL Note 1 Output High Voltage VOH IOH = -16 mA Output Low Voltage VOL IOL = 16 mA Operating Supply Current IDD No load, 135 MHz Nominal Output Impedance ZO Input Capacitance CIN Short Circuit Current IOS IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER ICLK 3 Min. Typ. Max. Units 2.375 2.625 V VDD/2+0.5 5.5 V VDD/2-0.5 V 2 V 0.4 V 25 mA 20 5 pF 28 mA ICS524 REV A 101705 ICS524 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER DC Electrical Characteristics (continued) VDD=3.3 V 5% , Ambient temperature -40 to +85C, unless stated otherwise Parameter Operating Voltage Symbol Conditions VDD Input High Voltage, ICLK VIH Note 1 Input Low Voltage, ICLK VIL Note 1 Output High Voltage VOH IOH = -25 mA Output Low Voltage VOL IOL = 25 mA Output High Voltage (CMOS Level) VOH IOH = -12 mA Operating Supply Current IDD No load, 135 MHz Nominal Output Impedance ZO Input Capacitance CIN Short Circuit Current IOS Min. Typ. Max. Units 3.15 3.45 V VDD/2+0.7 5.5 V VDD/2-0.7 V 2.4 V 0.4 VDD-0.4 V V 35 mA 20 5 pF 50 mA ICLK VDD=5 V 5% , Ambient temperature -40 to +85C, unless stated otherwise Parameter Operating Voltage Symbol Conditions VDD Input High Voltage, ICLK VIH Note 1 Input Low Voltage, ICLK VIL Note 1 Output High Voltage VOH IOH = -35 mA Output Low Voltage VOL IOL = 35 mA Output High Voltage (CMOS Level) VOH IOH = -12 mA Operating Supply Current IDD No load, 135 MHz Nominal Output Impedance ZO Input Capacitance CIN Short Circuit Current IOS ICLK Min. Typ. Max. Units 4.75 5.25 V VDD/2+1 5.5 V VDD/2-1 V 2.4 V 0.4 VDD-0.4 V V 45 mA 20 5 pF 80 mA Notes: 1. Nominal switching threshold is VDD/2 IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 4 ICS524 REV A 101705 ICS524 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER AC Electrical Characteristics VDD = 2.5 V 5%, Ambient Temperature -40 to +85C, unless stated otherwise Parameter Symbol Conditions Input Frequency Min. Typ. 0 Max. Units 200 MHz Output Rise Time tOR 0.8 to 2.0 V, CL=15 pF 1.0 1.5 ns Output Fall Time tOF 2.0 to 0.8 V, CL=15 pF 1.0 1.5 ns 3 5 ns 0 50 ps 500 ps Propagation Delay Note 1 Output to Output Skew Note 2 2.2 Rising edges at VDD/2 Device to Device Skew Rising edges at VDD/2 VDD = 3.3 V 5%, Ambient Temperature -40 to +85C, unless stated otherwise Parameter Symbol Conditions Input Frequency Min. Typ. 0 Max. Units 200 MHz Output Rise Time tOR 0.8 to 2.0 V, CL=15 pF 0.6 1.0 ns Output Fall Time tOF 2.0 to 0.8 V, CL=15 pF 0.6 1.0 ns 2.4 4 ns 0 50 ps 500 ps Propagation Delay Note 1 Output to Output Skew Note 2 2.0 Rising edges at VDD/2 Device to Device Skew Rising edges at VDD/2 VDD = 5 V 5%, Ambient Temperature -40 to +85C, unless stated otherwise Parameter Symbol Conditions Input Frequency Min. Typ. 0 Max. Units 200 MHz Output Rise Time tOR 0.8 to 2.0 V, CL=15 pF 0.3 0.7 ns Output Fall Time tOF 2.0 to 0.8 V, CL=15 pF 0.3 0.7 ns 2.5 4 ns 0 50 ps 500 ps Propagation Delay Note 1 Output to Output Skew Note 2 Device to Device Skew 1.8 Rising edges at VDD/2 Rising edges at VDD/2 Notes: 1. With rail to rail input clock 2. Between any 2 outputs with equal loading. 3. Duty cycle on outputs will match incoming clock duty cycle. Consult ICS for tight duty cycle clock generators. Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER Symbol Conditions Min. Typ. Max. Units JA Still air 150 C/W JA 1 m/s air flow 140 C/W JA 3 m/s air flow 120 C/W 40 C/W JC 5 ICS524 REV A 101705 ICS524 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Narrow Body) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters 8 E H INDEX AREA Symbol Min Max Min Max A 1.35 1.75 .0532 .0688 A1 0.10 0.25 .0040 .0098 B 0.33 0.51 .013 .020 C 0.19 0.25 .0075 .0098 D 4.80 5.00 .1890 .1968 E 3.80 4.00 .1497 .1574 e 1 2 D Inches* 1.27 BASIC 0.050 BASIC H 5.80 6.20 .2284 .2440 h 0.25 0.50 .010 .020 L 0.40 1.27 .016 .050 0 8 0 8 *For reference only. Controlling dimensions in mm. A h x 45 A1 C -Ce SEATING PLANE B L .10 (.004) C Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature ICS524MILF ICS524MILFT 524MILF 524MILF Tubes Tape and Reel 8-pin SOIC 8-pin SOIC -40 to +85 C -40 to +85 C 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 Circuit Systems (ICS) 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. IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 6 ICS524 REV A 101705 ICS524 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER 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 <product line email> <product line phone> Corporate Headquarters Asia Pacific and Japan Europe Integrated Device Technology, Inc. 6024 Silver Creek Valley Road San Jose, CA 95138 United States 800 345 7015 +408 284 8200 (outside U.S.) Integrated Device Technology Singapore (1997) Pte. Ltd. Reg. No. 199707558G 435 Orchard Road #20-03 Wisma Atria Singapore 238877 +65 6 887 5505 IDT Europe, Limited Prime House Barnett Wood Lane Leatherhead, Surrey United Kingdom KT22 7DE +44 1372 363 339 (c) 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. 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