ICS651 LOW SKEW 1 TO 4 CLOCK BUFFER Description Features 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. 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 1 MDS 651 C I n t e gra te d C i r c u i t S y s t e m s ● 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 1 8 OE Q1 2 7 VDD Q2 3 6 GND Q3 4 5 Q4 Pin Descriptions Pin Pin Number Name Pin Type Pin Description 1 ICLK Input Clock Input. 3.3 V tolerant 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 +1.8 V or +2.5 V. 8 OE 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 µF should be connected between VDD on pin 7 and GND on pin 6, as close to the device as possible. A 33 Ω 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 30Ω series termination on one output (with 33Ω on the others) will cause at least 15 ps of skew. 2 MDS 651 C In te grated Circuit Systems ● 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 Rating Supply Voltage, VDD 7V Output Enable and All Outputs -0.5 V to VDD+0.5 V ICLK -0.5 V to 3.6 V (VDD > 0V) Ambient Operating Temperature -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) +1.6 +3.6 V 3 MDS 651 C In te grated Circuit Systems ● 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 +85°C, unless stated otherwise Parameter Symbol Conditions Operating Voltage VDD Input High Voltage VIH Note 1, ICLK, OE Input Low Voltage VIL Note 1, ICLK, OE Output High Voltage VOH IOH = -6 mA Output Low Voltage VOL IOL = 6 mA Operating Supply Current IDD No load, 133 MHz Nominal Output Impedance ZO Input Capacitance CIN Short Circuit Current IOS Min. Typ. Max. Units 1.71 1.89 V 1.17 3.6 V 0.63 V 1.35 V 0.45 ICLK, OE pin V 25 mA 20 Ω 5 pF ±28 mA Notes: 1. Nominal switching threshold is VDD/2 VDD=2.5 V ±5%, Ambient temperature -40 to +85°C, unless stated otherwise Parameter Symbol Operating Voltage Conditions Min. VDD Input High Voltage, ICLK VIH Note 1, ICLK, OE Input Low Voltage, ICLK VIL Note 1, ICLK, OE Output High Voltage VOH IOH = -8 mA Output Low Voltage VOL IOL = 8mA Operating Supply Current IDD No load, 133 MHz Nominal Output Impedance ZO Input Capacitance CIN Short Circuit Current IOS Typ. Max. Units 2.375 2.625 V 1.7 3.6 V 0.7 V 2 V 0.4 ICLK, OE pin V 50 mA 20 Ω 5 pF ±50 mA Notes: 1. Nominal switching threshold is VDD/2 4 MDS 651 C In te grated Circuit Systems ● 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 +85°C, unless stated otherwise Parameter Symbol Conditions Min. Input Frequency Typ. 0 Max. Units 166 MHz Output Rise Time tOR 0.63 V to 1.17 V 1.0 1.5 ns Output Fall Time tOF 1.17 V to 0.63 V 1.0 1.5 ns 3 5 ns 0 ±250 ps Propagation Delay Note 1 Output to Output Skew Note 2 2.2 Rising edges at VDD/2 VDD = 2.5 V ±5%, Ambient Temperature -40 to +85°C, unless stated otherwise Parameter Symbol Conditions Min. Input Frequency Typ. 0 Max. Units 200 MHz Output Rise Time tOR 0.7 V to 1.7 V 1.0 1.5 ns Output Fall Time tOF 1.7 V to 0.7 V 1.0 1.5 ns 3 5 ns 0 ±250 ps Propagation Delay Note 1 Output to Output Skew Note 2 2.2 Rising edges at VDD/2 Notes: 1. With rail to rail input clock 2. Between any 2 outputs with equal loading. Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case Conditions Min. Typ. Max. Units θJA Still air 150 °C/W θJA 1 m/s air flow 140 °C/W θJA 3 m/s air flow 120 °C/W 40 °C/W θJC 5 MDS 651 C In te grated Circuit Systems Symbol ● 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 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 α 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 ICS651MI ICS651MIT ICS651MILF ICS651MILFT ICS651MI ICS651MI 651MILF 651MILF Tubes Tape and Reel Tubes Tape and Reel 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC -40 to +85°C -40 to +85°C -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. 6 MDS 651 C In te grated Circuit Systems ● 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. Originator Date A K. Beckmeyer 6/27/05 Preliminary Datasheet B K. Beckmeyer 8/31/05 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. C K. Beckmeyer 12/08/05 Added LF ordering info. 7 MDS 651 C In te grat ed Circuit Syst ems Description of Change ● 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