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| ICS651 LOW SKEW 1 TO 4 CLOCK BUFFER Description The ICS651 is a low skew, single input to four output, clock buffer. Part of ICS' ClockBlocksTM family, this is a low skew, small clock buffer. 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 * * * * * * * * Low skew outputs (250 ps) Packaged in 8-pin SOIC Available in Pb (lead) free package Low power CMOS technology Operating Voltages of 1.8 V to 2.5 V Output Enable pin tri-states outputs 3.3 V tolerant input clock Industrial temperature range Block Diagram Q0 Q1 ICLK Q2 Q3 Output Enable MDS 651 C I n t e gra te d C i r c u i t S y s t e m s 1 525 Race Stre et, San Jo se, CA 9 5126 Revision 120805 te l (40 8) 2 97-12 01 w w w. i c st . c o m ICS651 LOW SKEW 1 TO 4 CLOCK BUFFER Pin Assignment ICLK Q1 Q2 Q3 1 2 3 4 8 7 6 5 OE VDD GND Q4 Pin Descriptions Pin Pin Number Name 1 2 3 4 5 6 7 8 ICLK Q1 Q2 Q3 Q4 GND VDD OE Pin Type Input Output Output Output Output Power Power Input Clock Output 1. Clock Output 2. Clock Output 3. Clock Output 4. Connect to ground. Connect to +1.8 V or +2.5 V. Pin Description Clock Input. 3.3 V tolerant input. Output Enable. Tri-states outputs when low. Connect to VDD for normal operation. 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 7 and GND on pin 6, 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 ICS651 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. MDS 651 C In te grated Circuit Systems 2 525 Ra ce Street, San Jose, CA 9512 6 Revision 120805 tel (4 08) 297-1 201 w w w. i c s t . c o m ICS651 LOW SKEW 1 TO 4 CLOCK BUFFER Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS651. 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 Output Enable and All Outputs ICLK Ambient Operating Temperature Storage Temperature Junction Temperature Soldering Temperature 7V Rating -0.5 V to VDD+0.5 V -0.5 V to 3.6 V (VDD > 0V) -40 to +85 C -65 to +150C 125C 260C Recommended Operation Conditions Parameter Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) Min. -40 +1.6 Typ. Max. +85 +3.6 Units C V MDS 651 C In te grated Circuit Systems 3 525 Ra ce Street, San Jose, CA 9512 6 Revision 120805 tel (4 08) 297-1 201 w w w. i c s t . c o m ICS651 LOW SKEW 1 TO 4 CLOCK BUFFER DC Electrical Characteristics VDD=1.8 V 5%, Ambient temperature -40 to +85C, unless stated otherwise Parameter Operating Voltage Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage Operating Supply Current Nominal Output Impedance Input Capacitance Short Circuit Current Symbol VDD VIH VIL VOH VOL IDD ZO CIN IOS Conditions Note 1, ICLK, OE Note 1, ICLK, OE IOH = -6 mA IOL = 6 mA No load, 133 MHz ICLK, OE pin Min. 1.71 1.17 1.35 Typ. Max. 1.89 3.6 0.63 0.45 Units V V V V V mA 25 20 5 28 pF mA Notes: 1. Nominal switching threshold is VDD/2 VDD=2.5 V 5%, Ambient temperature -40 to +85C, unless stated otherwise Parameter Operating Voltage Input High Voltage, ICLK Input Low Voltage, ICLK Output High Voltage Output Low Voltage Operating Supply Current Nominal Output Impedance Input Capacitance Short Circuit Current Symbol VDD VIH VIL VOH VOL IDD ZO CIN IOS Conditions Note 1, ICLK, OE Note 1, ICLK, OE IOH = -8 mA IOL = 8mA No load, 133 MHz ICLK, OE pin Min. 2.375 1.7 2 Typ. Max. 2.625 3.6 0.7 0.4 Units V V V V V mA 50 20 5 50 pF mA Notes: 1. Nominal switching threshold is VDD/2 MDS 651 C In te grated Circuit Systems 4 525 Ra ce Street, San Jose, CA 9512 6 Revision 120805 tel (4 08) 297-1 201 w w w. i c s t . c o m ICS651 LOW SKEW 1 TO 4 CLOCK BUFFER AC Electrical Characteristics VDD = 1.8 V 5%, Ambient Temperature -40 to +85C, unless stated otherwise Parameter Input Frequency Output Rise Time Output Fall Time Propagation Delay Output to Output Skew Symbol tOR tOF Note 1 Note 2 Conditions 0.63 V to 1.17 V 1.17 V to 0.63 V Min. 0 Typ. 1.0 1.0 Max. Units 166 1.5 1.5 5 250 MHz ns ns ns ps 2.2 Rising edges at VDD/2 3 0 VDD = 2.5 V 5%, Ambient Temperature -40 to +85C, unless stated otherwise Parameter Input Frequency Output Rise Time Output Fall Time Propagation Delay Output to Output Skew Symbol tOR tOF Note 1 Note 2 Conditions 0.7 V to 1.7 V 1.7 V to 0.7 V Min. 0 Typ. 1.0 1.0 Max. Units 200 1.5 1.5 5 250 MHz ns ns ns ps 2.2 Rising edges at VDD/2 3 0 Notes: 1. With rail to rail input clock 2. Between any 2 outputs with equal loading. Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Symbol JA JA JA JC Conditions Still air 1 m/s air flow 3 m/s air flow Min. Typ. 150 140 120 40 Max. Units C/W C/W C/W C/W Thermal Resistance Junction to Case MDS 651 C In te grated Circuit Systems 5 525 Ra ce Street, San Jose, CA 9512 6 Revision 120805 tel (4 08) 297-1 201 w w w. i c s t . c o m ICS651 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 8 Inches* Min Max Symbol Min Max A A1 B E INDEX AREA H 1.35 0.10 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 .0532 .0040 .013 .0075 .1890 .1497 .2284 .010 .016 0 .0688 .0098 .020 .0098 .1968 .1574 .2440 .020 .050 8 C D E e 1.27 BASIC 0.050 BASIC 12 D H h L A A1 *For reference only. Controlling dimensions in mm. h x 45 C -Ce B SEATING PLANE L .10 (.004) C Ordering Information Part / Order Number ICS651MI ICS651MIT ICS651MILF ICS651MILFT Marking ICS651MI ICS651MI 651MILF 651MILF Shipping Packaging Tubes Tape and Reel Tubes Tape and Reel Package 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC Temperature -40 to +85C -40 to +85C -40 to +85C -40 to +85C 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. MDS 651 C In te grated Circuit Systems 6 525 Ra ce Street, San Jose, CA 9512 6 Revision 120805 tel (4 08) 297-1 201 w w w. i c s t . c o m ICS651 LOW SKEW 1 TO 4 CLOCK BUFFER Revision History Rev. A B Originator K. Beckmeyer K. Beckmeyer Date 6/27/05 8/31/05 Description of Change Preliminary Datasheet Output high and low voltage current conditions changed to 6mA and 6mA respectively at 1.8V, and -8mA and 8mA respectively at 2.5V operation. Short circuit current spec changed to 50mA typical at 2.5V operation. Output-to-output skew max spec changed to 250ps at both 1.8V and 2.5V operation. Added LF ordering info. C K. Beckmeyer 12/08/05 MDS 651 C In te grat ed Circuit Syst ems 7 525 Ra ce St reet , San Jose, CA 9512 6 Revision 120805 t el (4 08) 297-1 201 w w w. i c s t . c o m |
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