DATASHEET MK2308-1 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER Description Features The MK2308-1 is a low phase noise, high-speed PLL based, 8-output, low-skew zero delay buffer. Based on IDT's proprietary low jitter Phase Locked Loop (PLL) techniques, the device provides eight low skew outputs at speeds up to 133 MHz at 3.3 V. The outputs can be generated from the PLL (for zero delay), or directly from the input (for testing), and can be set to tri-state mode or to stop at a low level. For normal operation as a zero delay buffer, any output clock is tied to the FBIN pin. * * * * * Clock outputs from 10 to 133 MHz * * * * * * * 5 V tolerant FBIN and CLKIN pins Zero input-output delay Eight low skew (<200 ps) outputs Device-to-device skew <700 ps Full CMOS outputs with 25 mA output drive capability at TTL levels Tri-state mode for board-level testing Advanced, low power, sub-micron CMOS process Operating voltage of 3.3 V Industrial temperature range available Available in Pb (lead) free package Packaged in 16-pin SOIC Block Diagram VDD 2 S2, S1 2 Control Logic CLKA1 CLKA2 CLKA3 CLKIN CLKA4 FBIN 1 Clock Synthesis PLL 0 CLKB1 CLKB2 CLKB3 CLKB4 GND IDTTM / ICSTM 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER 2 1 Feedback is shown from CLKB4 for illustration, but may come from any output. MK2308-1 REV B 012805 MK2308-1 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER ZDB Pin Assignment C L K IN 1 16 F B IN C LKA1 2 15 C LKA4 C LKA2 3 14 C LKA3 VDD 4 13 VDD GND 5 12 GND C LKB1 6 11 C LKB4 C LKB2 7 10 C LKB3 S2 8 9 S1 1 6 p in n a rro w (1 5 0 m il) S O IC Output Clock Mode Select Table S2 S1 CLKA1:A4 CLKB1:B4 A & B Source PLL Status 0 0 Tri-state (note 1) Tri-state (note 1) PLL OFF 0 1 Running Tri-state (note 1) PLL ON 1 0 Running Running CLKIN (note 2) OFF 1 1 Running Running PLL ON Note 1. Outputs are in high impedance state Note 2. Buffer mode only; not zero delay between input and output Pin Descriptions Pin Number Pin Name Pin Type Pin Description 1 CLKIN Input 2-3 CLKA1:A4 Output Clock outputs A1:A4. See table above. 4 VDD Power Power supply. Connect to 3.3 V. 5 GND Power Connect to ground. 6-7 CLKB1:B4 Output Clock outputs B1:B4. See table above. 8 S2 Input Select input 2. See table above. Internal pull-up. 9 S1 Input Select input 1. See table above. Internal pull-up. 10 - 11 CLKB1:B4 Output Clock outputs B1:B4. See table above. 12 GND Power Connect to ground. 13 VDD Power Power supply. Connect to 3.3 V. 14 - 15 CLKA1:A4 Output Clock outputs A1:A4. See table above. 16 FBIN Input Clock input (5 V tolerant). Feedback input. Connect to any output under normal operation (5 V tolerant). IDTTM / ICSTM 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER 2 MK2308-1 REV B 012805 MK2308-1 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER ZDB External Components The MK2308-1 requires a minimum number of external components for proper operation. Decoupling capacitors of 0.01 F should be connected between VDD and GND on pins 4 and 5, and VDD and GND on pins 13 and 12, as close to the device as possible. A series termination resistor of 33 may be used to each clock output pin to reduce reflections. Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK2308-1. 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 CLKIN and FBIN inputs -0.5 V to 5.5 V Electrostatic Discharge 2000 V Ambient Operating Temperature 0 to +70C Industrial Temperature -40 to +85C Commercial temperature 0 to 70C Storage Temperature -65 to +150C Junction Temperature 150C Soldering Temperature 260C Recommended Operation Conditions Parameter Min. Ambient Operating Temperature (Industrial) Ambient Operating Temperature (Commercial) Power Supply Voltage (measured in respect to GND) IDTTM / ICSTM 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER 3 Typ. Max. Units -40 +85 C 0 +70 C +3.0 +3.6 V MK2308-1 REV B 012805 MK2308-1 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER ZDB DC Electrical Characteristics VDD=3.3 V 10%, Ambient temperature -40 to +85C(Industrial), (0-70C Commercial), Parameter Symbol Conditions Min. Operating Voltage VDD 3.0 Input High Voltage VIH 2 Input Low Voltage VIL Input Low Current IIL Input High Current IIH Typ. Max. Units 3.6 V V 0.8 V VIN = 0V 50 A VIN = VDD 100 A Output High Voltage VOH IOH = -12 mA Output Low Voltage VOL IOL = 12 mA Output High Voltage, CMOS level VOH IOH = -4 mA Operating Supply Current IDD No Load, S2 = 1, S1 = 1, Note 1 Power Down Supply Current IDDPD CLKIN = 0, S2 = 0, S1 = 1 12 A CLKIN = 0, Note 2 12 A Short Circuit Current IOS Each output 50 mA Input Capacitance CIN S2, S1, FBIN 5 pF 2.4 V 0.4 VDD-0.4 V V 70 mA AC Electrical Characteristics VDD = 3.3 V 10%, Ambient Temperature -40 to +85C(Industrial), (0-70C Commercial) Parameter Input Clock Frequency Symbol Conditions fIN Output Clock Frequency Min. Typ. Max. Units See table on page 2 10 133 MHz See table on page 2 10 133 MHz Output Rise Time tOR 0.8 to 2.0 V, CL=30 pF 1.5 ns Output Fall Time tOF 2.0 to 0.8 V, CL=30 pF 1.25 ns Output Clock Duty Cycle tDC measured at VDD/2 55 % 45 50 Device to Device Skew rising edges at VDD/2 700 ps Output to Output Skew rising edges at VDD/2 200 ps Input to Output Skew Delay CLKIN Rising Edge to FBIN Rising Edge 250 ps Maximum Absolute Jitter CL=15 pF, measured at 66.67M Cycle to Cycle Jitter CL=30 pF, measured at 66.67M 200 ps CL=15 pF, measured at 66.67M 200 ps CL=15 pF, measured at 133.33M 100 ps Note 3 1.0 ms PLL Lock Time 130 ps Note 1: With CLKIN = 100MHz, FBIN to CLKA4, all outputs at 100 MHz IDTTM / ICSTM 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER 4 MK2308-1 REV B 012805 MK2308-1 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER ZDB Note 2: When there is no clock signal present at CLKIN, the MK2308-1 will enter power down mode. The PLL is stopped and the outputs are tri-state. Note 3: With VDD at a steady rate and valid clocks at CLKIN and FBIN Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case IDTTM / ICSTM 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER Symbol Conditions Min. Typ. Max. Units JA Still air 120 C/W JA 1 m/s air flow 115 C/W JA 3 m/s air flow 105 C/W 58 C/W JC 5 MK2308-1 REV B 012805 DATASHEET MK2308-1 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER Package Outline and Package Dimensions (16-pin SOIC, 150 Mil. Narrow Body) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters 16 Symbol E A A1 B C D E e H h L H INDEX AREA 1 2 D A Min Inches Max 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 9.80 10.00 3.80 4.00 1.27 BASIC 5.80 6.20 0.25 0.50 0.40 1.27 0 8 Min Max .0532 .0688 .0040 .0098 .013 .020 .0075 .0098 .3859 .3937 .1497 .1574 0.050 BASIC .2284 .2440 .010 .020 .016 .050 0 8 h x 45 A1 C -Ce B SEATING PLANE L .10 (.004) C Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature MK2308S-1I MK2308S-1IT MK2308S-1 MK2308S-1T MK2308S-1ILF MK2308S-1ILFT MK2308S-1LF MK2308S-1LFT MK2308S-1I MK2308S-1I MK2308S-1 MK2308S-1 MK2308S-1ILF MK2308S-1ILF MK2308S-1LF MK2308S-1LF Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel 16-pin SOIC 16-pin SOIC 16-pin SOIC 16-pin SOIC 16-pin SOIC 16-pin SOIC 16-pin SOIC 16-pin SOIC -40 to +85 C -40 to +85 C 0 to +70 C 0 to +70 C -40 to +85 C -40 to +85 C 0 to +70 C 0 to +70 C 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. IDTTM / ICSTM 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER 6 MK2308-1 REV B 012805 MK2308-1 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER ZDB 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 408-284-4522 clockhelp@idt.com Corporate Headquarters Integrated Device Technology, Inc. www.idt.com (c) 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