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| PI6C18551 3.3V/5V 1 to 4 Clock Buffer Features * * * * * * * 160MHz maximum frequency Low skew: 250ps Fast rise/fall time: 1.5ns Output Enable with tri-states Industrial Temperature 3.3V or 5V power supply Packaging (Pb-free & Green available): -8-pin SOIC (W) Description PI6C18551 is a low skew, low noise and high-speed clock buffer for computing, networking and communication applications. It is a non-inverting buffer with four outputs from a single input. The outputs are controlled by output enable pin (OE), outputs are tri-states when OE is LOW, and outputs are enabled when OE is HIGH. Applications * * * * * * 33MHz for PCI MHz for SDRAM 106.25MHz for Fibre Channel 125MHz for Ethernet 133MHz for PCIX 155.52MHz for OC3/SONET Pin Description CLK_IN Y0 Y1 Y2 1 2 3 4 8 7 6 5 OE VDD GND Y3 Logic Block Diagram Y0 Y1 Y2 CLK_IN OE Y3 Function Table Inputs CLK_IN X L H Note: 1. X = Don't Care; Z = Tri-state Outputs OE L H H Y[3:0] Z L H 1 PS8733A 09/27/04 PI6C18551 3.3V/5V 1 to 4 Clock Buffer Pin Description Pin Name CLK_IN Y0 Y1 Y2 Y3 GND VDD OE Type Input Output Output Output Output Ground Power Input Pin No 1 2 3 4 5 6 7 8 Output clock Output clock Output clock Output clock GROUND 3.3V or 5V power supply Output Enable with pull-up resistor Descriptions Input clock with pull-up resistor External Components A minimum number of external components are required for proper operation. A decoupling capacitor of 0.01F 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. Absolute Maximun Ratings (Over operating free-air temperature range) Symbol VDD VI VO Ts Ta Tso Parameters Supply Voltage Input Voltage Output Voltage Storage Temperature Ambient Temperature Soldering Temperature -0.5 -0.5 -65 -40 Min. Max. 7 VDD+0.5 VDD+0.5 150 85 260 C V Units 2 PS8733A 09/27/04 PI6C18551 3.3V/5V 1 to 4 Clock Buffer DC Electrical Characteristics (VDD = 3.3V 5%, TA = -40 to 85C) Symbol VDD VIH VIL VOH VOL VOH IDD ZO CIN RPU IOS Parameters 3.3V I/O Supply Voltage Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage Output High Voltage (CMOS Level) Power Supply Current Output Impedance Input Capacitance Internal Pull-up Resistor Short Circuit Current CLK_IN OE CLK_IN & OE CLK_IN, Note 1 OE CLK_IN, Note 1 OE IOH = -25mA IOL = 25mA IOH = -12mA No load at 135MHz VDD - 0.4 18 20 TBD TBD 120 50 mA pF k mA 2.4 0.4 Condition Min. 3.135 VDD/2 + 0.7 2 Typ. Max. 3.465 3.8 VDD VDD/2 - 0.7 0.8 V Units Notes: 1. Nominal switching threshold is VDD/2 3 PS8733A 09/27/04 PI6C18551 3.3V/5V 1 to 4 Clock Buffer DC Electrical Characteristics (VDD = 5V 5%, TA = -40 to 85C) Symbol VDD VIH VIL VOH VOL VOH IDD ZO Cin RPU IOS Parameters 5V I/O Supply Voltage Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage Output High Voltage (CMOS Level) Power Supply Current Output Impedance Input Capacitance Internal Pull-up Resistor Short Circuit Current CLK_IN OE CLK_IN & OE CLK_IN, Note 1 OE CLK_IN, Note 1 OE IOH = -35mA IOL = 35mA IOH = -12mA No load at 135MHz VDD - 0.4 35 20 TBD TBD 77 80 mA pF k mA 2.4 0.4 Condition Min. 4.75 VDD/2 + 1 2 Typ. Max. 5.25 5.5 VDD VDD/2 - 1 0.8 V Units Notes: 1. Nominal switching threshold is VDD/2 AC Electrical Characteristics (VDD = 3.35%, TA = -40 to 85C) Symbol Fin Fo Fo TR TF TPD TPD TSK Parameters Input Frequency Output Frequency Output Frequency Rise Time Fall Time Propagation Delay Propagation Delay Output Skew 3.3V, 15pF load(5) 5V, l5pF load(5) 0.8V to 2.0V 2.0V to 0.8V 3.3V, 135MHz(2) /2(3) 2 1.5 4 3 5V, 135MHz(2) VDD Condition Min. 0 Typ. Max. 160 160 135 1.5 1.5 8 6 250 ps ns MHz Units Notes: 1. With rail to rail input clock. 2. All outputs with equal loading. 3. Duty cycle on outputs will match incoming clock duty cycle. 4. With external series resistor 33 positioned close to each output pin. 4 PS8733A 09/27/04 PI6C18551 3.3V/5V 1 to 4 Clock Buffer Packaging Mechcanical: 8-pin SOIC (W) 8 .149 .157 3.78 3.99 .0099 .0196 0.25 x 45 0.50 1 .189 .196 .016 .026 0.406 0.660 REF 0-8 4.80 5.00 .053 .068 .0075 .0098 0.40 .016 1.27 .050 0.19 0.25 1.35 1.75 SEATING PLANE .2284 .2440 5.80 6.20 .050 BSC 1.27 .0040 0.10 .0098 0.25 .013 0.330 .020 0.508 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Ordering Information: Ordering Code PI6C18551W PI6C18551WE Packaging Code W W 8-pin SOIC Pb-free & Green, 8-pin SOIC Package Type Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com 5 PS8733A 09/27/04 |
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