DATASHEET ICS551 1 TO 4 CLOCK BUFFER Description Features The ICS551 is a low cost, high-speed single input to four output clock buffer. Part of IDT’s ClockBlocksTM family, this is our lowest cost, small clock buffer. • • • • • • • • • • • See the ICS552-02B for monolithic dual version of the ICS551 in a 20 pin QSOP. IDT makes many non-PLL and PLL based low skew output devices as well as Zero Delay Buffers to synchronize clocks. Contact IDT for all of your clocking needs. Low skew (250 ps) outputs Pb-free packaging Low cost clock buffer Packaged in 8-pin SOIC Input/Output clock frequency up to 160 MHz Non-inverting output clock Ideal for networking clocks Operating Voltages of 3.3 and 5.0 V Output Enable mode tri-states outputs Advanced, low power CMOS process Commercial and industrial temperature versions Block Diagram Q1 Q2 ICLK Q3 Q4 Output Enable IDT™ 1 TO 4 CLOCK BUFFER 1 ICS551 REV P 051310 ICS551 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Pin Assignment I CLK 1 8 OE Q1 2 7 VDD Q2 3 6 GND Q3 4 5 Q4 8 Pi n ( 150 mi l ) SOI C Pin Descriptions Pin Number Pin Name Pin Type Pin Description 1 ICLK Input 2 Q1 Output Clock output 1. 3 Q2 Output Clock output 2. 4 Q3 Output Clock output 3. 5 Q4 Output Clock output 4. 6 GND Power Connect to ground. 7 VDD Power Connect to 3.3 V or 5.0 V. 8 OE Input Output Enable. Tri-states outputs when low. Internal pull-up resistor. Clock input. Internal pull-up resistor. External Components A minimum number of external components are required for proper operation. A decoupling capacitor of 0.01 µF should be connected between VDD on pin 7 and GND on pin 6, as close to the device as possible. A 33Ω series terminating resistor may be used on each clock output if the trace is longer than 1 inch. IDT™ 1 TO 4 CLOCK BUFFER 2 ICS551 REV P 051310 ICS551 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS551. 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, Commercial 0 to +70° C Ambient Operating Temperature, Industrial -40 to +85° C Storage Temperature -65 to +150° C Junction Temperature 125° C Soldering Temperature 260° C Recommended Operation Conditions Parameter Min. Typ. Max. Units Ambient Operating Temperature -40 – +85 °C Power Supply Voltage (measured in respect to GND) +3.0 +5.5 V IDT™ 1 TO 4 CLOCK BUFFER 3 ICS551 REV P 051310 ICS551 1 TO 4 CLOCK BUFFER FAN OUT BUFFER DC Electrical Characteristics VDD=3.3 V ±10% , Ambient temperature -40 to +85 ° C, unless stated otherwise Parameter Operating Voltage Symbol Conditions VDD Input High Voltage, ICLK VIH Note 1 Input Low Voltage, ICLK VIL Note 1 Input High Voltage, OE VIH Input Low Voltage, OE VIL 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 Internal Pull-up Resistor RPU OE Input Capacitance CIN OE pin Short Circuit Current IOS Min. Typ. Max. Units 3.0 3.6 V VDD/2+0.7 3.8 V VDD/2-0.7 V VDD V 0.8 V 2 2.4 V 0.4 VDD-0.4 V V 18 mA 20 Ω 500 kΩ 5 pF ±50 mA VDD = 5 V ±10% , Ambient temperature -40 to +85 ° C, unless stated otherwise Parameter Operating Voltage Symbol Conditions VDD Input High Voltage, ICLK VIH Note 1 Input Low Voltage, ICLK VIL Note 1 Input High Voltage, OE VIH Input Low Voltage, OE VIL 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 Internal Pull-up Resistor RPU OE Input Capacitance CIN OE pin Short Circuit Current IOS Min. Typ. Max. Units 4.5 5.5 V VDD/2+1 5.5 V VDD/2-1 V VDD V 0.8 V 2 2.4 V 0.4 VDD-0.4 V V 35 mA 20 Ω 220 kΩ 5 pF ±80 mA Notes: 1. Nominal switching threshold is VDD/2. IDT™ 1 TO 4 CLOCK BUFFER 4 ICS551 REV P 051310 ICS551 1 TO 4 CLOCK BUFFER FAN OUT BUFFER AC Electrical Characteristics VDD = 3.3 V ±10%, Ambient Temperature -40 to +85 ° C, unless stated otherwise Parameter Symbol Conditions Min. Input Frequency Typ. 0 Output Frequency Max. Units 160 MHz 15 pF load, Note 4 160 MHz Output Clock Rise Time tOR 0.8 to 2.0 V 1.0 ns Output Clock Fall Time tOF 2.0 to 0.8 V 1.0 ns 8 ns 250 ps Propagation Delay Note 1 135 MHz Output to Output Skew Note 2 Rising edges at VDD/2 2 4 VDD = 5 V ±10%, Ambient Temperature -40 to +85 ° C, unless stated otherwise Parameter Symbol Conditions Min. Input Frequency Typ. 0 Output Frequency Max. Units 135 MHz 15 pF load, Note 4 135 MHz Output Clock Rise Time tOR 0.8 to 2.0 V 1.0 ns Output Clock Fall Time tOF 2.0 to 0.8 V 1.0 ns 6 ns 250 ps Propagation Delay Note 1 135 MHz Output to Output Skew Note 2 Rising edges at VDD/2 1.5 3 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 IDT for tight duty cycle clock generators. 4. With external series resistor of 33Ω positioned close to each output pin. Marking Diagram (ICS551MLF) 8 Marking Diagram (ICS551MLN) 8 5 551MLN ###### YYWW 551MLF ###### YYWW 1 IDT™ 1 TO 4 CLOCK BUFFER 5 1 4 5 4 ICS551 REV P 051310 ICS551 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Marking Diagram (ICS551MILF) 8 5 551MILF ###### YYWW 1 4 Notes: 1. ###### is the lot number. 2. YYWW is the last two digits of the year and week that the part was assembled. 3. “LF” denotes Pb (lead) free package. 4. Bottom marking: (origin) Origin = country of origin if not USA. IDT™ 1 TO 4 CLOCK BUFFER 6 ICS551 REV P 051310 ICS551 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 Inches 8 E 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 H INDEX AREA e 1 2 D 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 α 0° 8° 0° 8° A h x 45 A1 C -Ce B SEATING PLANE L .10 (.004) IDT™ 1 TO 4 CLOCK BUFFER C 7 ICS551 REV P 051310 ICS551 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature 551MLF 551MLFT 551MLN 551MLNT 551MILF 551MILFT 551MLF 551MLF 551MLN 551MLN 551MILF 551MILF Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 0 to +70 ° C 0 to +70 ° C 0 to +70 ° C 0 to +70 ° C -40 to +85 ° C -40 to +85 ° C "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. “LN” denotes parts that are Pb free and annealed. 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™ 1 TO 4 CLOCK BUFFER 8 ICS551 REV P 051310 ICS551 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 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