 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| MK3805 Buffer/Clock Driver Description The MK3805 is a non-inverting clock driver/buffer providing two independent banks of four outputs each. These buffers have a tri-state output enable input (active low) with 1-input, 5-output configuration per group. The skew between the outputs of the same package is 0.5 ns and the skew between the outputs of different packages is 0.8 ns. The maximum input to output delay is 4.5 ns. Features * * * * * * * * Packaged in 20-pin SSOP Five outputs for each bank with one clock input Two separate banks of five outputs each Advanced, low-power, CMOS process Ten output clocks Two separate inputs Industrial temperature range -40C to +85C Hysteresis on all inputs Block Diagram VDD 2 OEA INA OA0-4 5 OEB INB OB0-4 5 MON 3 GND MDS 3805 B 1 Revision 031104 Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com MK3805 Buffer/Clock Driver Pin Assignment VCC OA0 OA1 OA2 GND OA3 OA4 GND OEA INA 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC OB0 OB1 OB2 GND OB3 OB4 MON OEB INB Truth Table Inputs OEA, OEB L L H H INA, INB L H L H Outputs OAN, OBN L H Z Z MON L H L H 20 pin (150 mil) SSOP/20 pin (300mil) SOIC Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Pin Name VCC OA0 OA1 OA2 GND OA3 OA4 GND OEA INA INB OEB MON OB4 OB3 GND OB2 OB1 OB0 VCC Pin Type Power Output Output Output Power Output Output Power Input Input Input Input Output Output Output Power Output Output Output Power Connect to +3.3 V Clock output. Clock output. Clock output. Connect to ground. Clock output. Clock output. Connect to ground. Pin Description Tri state output enable input (active low). Clock input. Clock input. Tri state output enable input (active low). Monitor output. Clock output. Clock output. Connect to ground. Clock output. Clock output. Clock output. Connect to +3.3 V MDS 3805 B 2 Revision 031104 Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com MK3805 Buffer/Clock Driver External Components The MK3805 requires a minimum number of external components for proper operation. PCB Layout Recommendations For optimum device performance and lowest output phase noise, the following guidelines should be observed. 1) The 0.01F decoupling capacitors should be mounted on the component side of the board as close to the VDD pins as possible. No vias should be used between the decoupling capacitors and VDD pins. The PCB trace to VDD pin should be kept as short as possible, as should the PCB trace to the ground via. 2) To minimize EMI, the 33 series termination resistor (if needed) should be placed close to the clock output. 3) An optimum layout is one with all components on the same side of the board, minimizing vias through the signal layers. Other signal traces should be routed away from the MK3805. This includes signal traces just underneath the device, or on layers adjacent to the ground plane layer used by the device. Decoupling Capacitors Decoupling capacitors of 0.01F must be connected between VDD and GND, as close to these pins as possible. For optimum device performance, the decoupling capacitors should be mounted on the component side of the PCB. Avoid the use of vias in the decoupling circuit. Series Termination Resistor When the PCB trace between the clock outputs and the loads are over 1 inch, series termination should be used. To series terminate a 50 trace (a commonly used trace impedance) place a 33 resistor in series with the clock line, as close to the clock output pin as possible. The nominal impedance of the clock output is 20. Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK3805. 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 -0.5 V to VDD+0.5 V -40 to +85C -65 to +150C 125C 260C MDS 3805 B 3 Revision 031104 Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com MK3805 Buffer/Clock Driver Recommended Operation Conditions Parameter Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) Min. -40 +3.13 Typ. +3.3 Max. +85 +3.46 Units C V DC Electrical Characteristics Unless stated otherwise, VDD = 3.3 V 5%, Ambient Temperature -40C to +85C Parameter Operating Voltage Supply Current Symbol VDD IDD Conditions No load, OEA,OEB GND, fo=10MHz, 50% duty cycle No load, OEA,OEB GND, fo=2.5MHz, 50% duty cycle Min. 3.13 Typ. 3.3 3.3 Max. 3.46 Units V mA IDD 1.8 mA Quiescent Current Input High Voltage Input Low Voltage Output High Voltage Output High Voltage Output Low Voltage Short Circuit Current Input Capacitance Nominal Output Impedance Input Hysteresis ICC VIH VIL VOH VOH VOL IOS ZO VH IOH = -4 mA IOH = -12 mA IOL = 12 mA CLK output VDD-0.4 2.4 2 3 30 0.8 A V V V V 0.4 50 5 20 150 V mA pF mV MDS 3805 B 4 Revision 031104 Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com MK3805 Buffer/Clock Driver AC Electrical Characteristics Unless stated otherwise, VDD = 3.3 V 5%, Ambient Temperature -40C to +85C Parameter Skew between outputs of same package) Skew between outputs of different packages at same temp (same transition) Propagation Delay INA to OAN INB to OBN Output Rise Time 0.8 V to 2.0 V Output Fall Time 2.0 V to 0.8 V Output Enable Time Output Disable Time Duty Cycle Measured at VDD/2 Operating Frequency Symbol tsk(o) tsk(t) Conditions CL=50 pF, RL=500 CL=50 pF, RL=500 Min. Typ. Max. Units 0.5 0.8 ns ns tPLH, tPHL tR tF OEA to OAN, OEB to OBN OEA to OAN, OEB to OBN CL=50 pF, RL=500 CL=50 pF, RL=500 CL=50 pF, RL=500 CL=50 pF, RL=500 CL=50 pF, RL=500 CL=50 pF, RL=500 CL=50 pF, RL=500 1.5 4.5 2 2 ns ns ns ns ns % MHz 1.5 1.5 45 1 6.2 5.0 55 100 MDS 3805 B 5 Revision 031104 Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com MK3805 Buffer/Clock Driver Package Outline and Package Dimensions (20-pin SSOP, 150Mil. Body) Package dimensions are kept current with JEDEC Publication No. 95 20 Millimeters Symbol E1 INDEX AREA E Inches Min Max Min Max 12 D A A1 A2 b C D E E1 e L 1.35 1.75 0.10 0.25 -1.50 0.20 0.30 0.18 0.25 8.55 8.75 5.80 6.20 3.80 4.00 0.635 Basic 0.40 1.27 0 8 .053 .069 .0040 .010 -.059 0.008 0.012 .007 .010 .337 .344 .228 .244 .150 .157 0.025 Basic .016 .050 0 8 A2 A1 A c -Ce b SEATING PLANE L .10 (.004) C Ordering Information Part / Order Number MK3805RI MK3805RIT Marking MK3805RI MK3805RI Shipping packaging Tubes Tape and Reel Package 20-pin SSOP 20-pin SSOP Temperature -40 to +85 C -40 to +85 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 3805 B 6 Revision 031104 Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com |
Price & Availability of MK3805
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |