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| ICS553 LOW SKEW 1 TO 4 CLOCK BUFFER Description The ICS553 is a low skew, single input to four output, clock buffer. Part of ICS' Clock BlocksTM family, this is our lowest skew, small clock buffer. See the ICS552-02 for a 1 to 8 low skew buffer. For more than 8 outputs see the MK74CBxxx Buffalo TM 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. Features * * * * * * Extremely low skew outputs (50ps maximum) Packaged in 8 pin SOIC Low power CMOS technology Operating Voltages of 2.5 to 5V Output Enable pin tri-states outputs 5V tolerant input clock Block Diagram Q0 Q1 IC LK Q2 Q3 O utput E nable MDS 553 B In tegr ated C ir cu it S yst ems q 1 5 25 Ra ce Str eet, San Jose, C A 95 126 q Revision 052501 tel ( 408) 2 95-9 800 q www. i c s t. c om ICS553 LOW SKEW 1 TO 4 CLOCK BUFFER Pin Assignment VDD Q0 Q1 GND 1 2 3 4 8 7 6 5 OE Q3 Q2 I CLK 8 Pi n (150 mi l) SOIC Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 Pin Name VDD Q0 Q1 GND ICLK Q2 Q3 OE Pin Type Power Output Output Power Input Output Output Input Clock Output 0 Clock Output 1 Ground Pin Description Connect to +2.5V, +3.3V or +5.0V. Clock Input. 5V tolerant input. Clock Output 2 Clock Output 3 Output Enable. Tri-states outputs when low. 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 1 and GND on pin 4, 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 ICS553 is capable of, careful attention must be paid to board layout. Essentially, all 4 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 15ps of skew. MDS 553 B Int egrat ed C ircuit Syste ms q 2 525 R ace S tr eet, San Jose, CA 95126 q Revision 052501 t el (40 8) 295 -9800 q w ww. ic s t .c o m ICS553 LOW SKEW 1 TO 4 CLOCK BUFFER Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS553. 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 Supply Voltage, VDD All Inputs and Outputs Ambient Operating Temperature Storage Temperature Junction Temperature Soldering Temperature 7V Rating -0.5V to VDD+0.5V 0 to +70C -65 to +150C 175C 260C Recommended Operation Conditions Parameter Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) Min. 0 +2.375 Typ. - Max. +70 +5.25 Units C V DC Electrical Characteristics VDD=2.5V 5%, Ambient temperature 0 to +70C, unless stated otherwise Parameter Operating Voltage Input High Voltage, ICLK Input Low Voltage, ICLK Input High Voltage, OE Input Low Voltage, OE Output High Voltage Output Low Voltage Operating Supply Current Short Circuit Current Symbol VDD VIH VIL VIH VIL VOH VOL IDD IOS Conditions Note 1 Note 1 Min. 2.375 VDD/2+0.5 2 Typ. Max. 2.625 5.5 VDD/2-0.5 VDD 0.4 Units V V V V V V V mA mA IOH = -16 mA IOL = 16 mA No load, 135 MHz 2 0.5 25 28 MDS 553 B Int egrat ed C ircuit Syste ms q 3 525 R ace S tr eet, San Jose, CA 95126 q Revision 052501 t el (40 8) 295 -9800 q w ww. ic s t .c o m ICS553 LOW SKEW 1 TO 4 CLOCK BUFFER DC Electrical Characteristics (continued) VDD=3.3V 5% , Ambient temperature 0 to +70C, unless stated otherwise Parameter Operating Voltage Input High Voltage, ICLK Input Low Voltage, ICLK Input High Voltage, OE Input Low Voltage, OE Output High Voltage Output Low Voltage Output High Voltage (CMOS Level) Operating Supply Current Short Circuit Current Symbol VDD VIH VIL VIH VIL VOH VOL VOH IDD IOS Conditions Note 1 Note 1 Min. 3.15 VDD/2+0.7 2 Typ. Max. 3.45 5.5 VDD/2-0.7 VDD 0.4 Units V V V V V V V V IOH = -25 mA IOL = 25 mA IOH = -12 mA No load, 135 MHz 2.4 0.8 VDD-0.4 35 50 mA mA VDD=5V 5% , Ambient temperature 0 to +70C, unless stated otherwise Parameter Operating Voltage Input High Voltage, ICLK Input Low Voltage, ICLK Input High Voltage, OE Input Low Voltage, OE Output High Voltage Output Low Voltage Output High Voltage (CMOS Level) Operating Supply Current Short Circuit Current Symbol VDD VIH VIL VIH VIL VOH VOL VOH IDD IOS Conditions Note 1 Note 1 Min. 4.75 VDD/2+1 2 Typ. Max. 5.25 5.5 VDD/2-1 VDD 0.4 Units V V V V V V V V IOH = -45 mA IOL = 45 mA IOH = -12 mA No load, 135 MHz 2.4 0.8 VDD-0.4 50 80 mA mA Notes: 1. Nominal switching threshold is VDD/2 MDS 553 B Int egrat ed C ircuit Syste ms q 4 525 R ace S tr eet, San Jose, CA 95126 q Revision 052501 t el (40 8) 295 -9800 q w ww. ic s t .c o m ICS553 LOW SKEW 1 TO 4 CLOCK BUFFER AC Electrical Characteristics VDD = 2.5V 5%, Ambient Temperature 0 to +70 C, unless stated otherwise Parameter Input Frequency Output Rise Time Output Fall Time Propagation Delay Output to output skew tOR tOF Note 1 Note 2 Rising edges at VDD/2 0.8 to 2.0V, CL=15pF 2.0 to 0.8V, CL=15pF 3 0 50 Symbol Conditions Min. 0 Typ. Max. Units 200 1.5 1.5 MHz ns ns ns ps VDD = 3.3V 5%, Ambient Temperature 0 to +70 C, unless stated otherwise Parameter Input Frequency Output Rise Time Output Fall Time Propagation Delay Output to output skew tOR tOF Note 1 Note 2 Rising edges at VDD/2 0.8 to 2.0V, CL=15pF 2.0 to 0.8V, CL=15pF 2.6 0 50 Symbol Conditions Min. 0 Typ. Max. Units 200 1.0 1.0 MHz ns ns ns ps VDD = 5V 5%, Ambient Temperature 0 to +70 C, unless stated otherwise Parameter Input Frequency Output Rise Time Output Fall Time Propagation Delay Output to output skew 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. tOR tOF Note 1 Note 2 Rising edges at VDD/2 0.8 to 2.0V, CL=15pF 2.0 to 0.8V, CL=15pF 2.5 0 50 Symbol Conditions Min. 0 Typ. Max. Units 200 0.7 0.7 MHz ns ns ns ps MDS 553 B Int egrat ed C ircuit Syste ms q 5 525 R ace S tr eet, San Jose, CA 95126 q Revision 052501 t el (40 8) 295 -9800 q w ww. ic s t .c o m ICS553 LOW SKEW 1 TO 4 CLOCK BUFFER Package Outline and Package Dimensions (8 pin SOIC, 150 Mil. Narrow Body) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters Symbol Min Max Inches Min Max A A1 B C D E In d e x A re a 1.35 1.10 0.33 0.19 4.80 3.80 5.80 0.25 0.40 0 1.75 0.25 0.51 0.25 5.00 4.00 6.20 0.50 1.27 8 0.0532 0.0040 0.013 0.0075 .1890 0.1497 0.2284 0.010 0.016 0 0.0688 0.0098 0.020 0.0098 .1968 0.1574 0.2440 0.020 0.050 8 e E H 1.27 Basic 0.050 Basic H h L a P in 1 D h x 450 A Q e b c Ordering Information Part / Order Number ICS553M ICS553MT Marking ICS553M ICS553M Shipping packaging Tubes Tape and Reel Package 8 pin SOIC 8 pin SOIC Temperature 0 to +70 C 0 to +70 C While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (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. MDS 553 B Int egrat ed C ircuit Syste ms q 6 525 R ace S tr eet, San Jose, CA 95126 q Revision 052501 t el (40 8) 295 -9800 q w ww. ic s t .c o m |
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