MK2746-01GLFTR

DATASHEET MK2746-01 USB-DVR CLOCK SOURCE Description Features The MK2746-01 is a low cost, low jitter, high performance clock synthesizer for USB-DVR based applications. Using analog Phase Locked Loop (PLL) techniques, the device accepts a 27 MHz fundamental mode crystal or clock input to produce multiple output clocks for USB and Video applications. • Packaged in 16 pin TSSOP • Operating voltage of 3.3 V • Provides three fixed outputs of 27 MHz, 24.576 MHz (Video), and 24 MHz (USB). • Advanced, low power, sub-micron CMOS process • RoHS 5 (green) or RoHS 6 (green and lead free) IDT manufacturers the largest variety of DVD, set top box, and multimedia clock synthesizers for all applications. compliant package Block Diagram VDD 4 24.576M Video decoder clock.. PLL / Clock Circuit 24M USB Clock 27 MHz crystal or clock X1/ICLK X2 Clock Buffer/ Crystal Ocsillator 3 27M Video Clock 4 OE G ND External crystal capacitors may be required IDT™ USB-DVR CLOCK SOURCE 1 MK2746-01 REV E 051310 MK2746-01 USB-DVR CLOCK SOURCE CLOCK SYNTHESIZER Pin Assignment X2 1 16 27M X1/ICLK 2 15 27M VDD 3 14 27M GND 4 13 VDD 24M 5 12 GND VDD 6 11 GND OE 7 10 VDD 24.576M 8 9 GND 16 pin (173 mil) TSSOP Pin Descriptions Pin Number Pin Name Pin Type Pin Description 1 X2 Input Connect to a 27 MHz fundamental mode crystal. Leave open for clock input. 2 X1/ICLK Input Connect to a 27 MHz fundamental mode crystal or clock. 3 VDD Power Connect to +3.3 V. 4 GND Power Connect to ground. 5 24M Output 24MHz USB clock output . Internal pull-down to low when OE is low. 6 VDD Power Connect to +3.3 V. 7 OE Input Output enable (OE high enables outputs). Internal pull-up. 8 24.576M Output 24.576 MHz clock output. Internal pull-down to low when OE is low. 9 GND Power Connect to ground. 10 VDD Power Connect to +3.3 V. 11 GND Power Connect to ground. 12 GND Power Connect to ground. 13 VDD Power Connect to +3.3 V. 14 27M Output 27 MHz clock output. Internal pull-down to low when OE is low. 15 27M Output 27 MHz clock output. Internal pull-down to low when OE is low. 16 27M Output 27 MHz clock output. Internal pull-down to low when OE is low. External Component Selection The MK2746-01 requires a minimum number of external components for proper operation. capacitors should be mounted on the component side of the PCB. Avoid the use of vias in the decoupling circuit. Decoupling Capacitors Series Termination Resistor Decoupling capacitors of 0.01µF should be connected between VDD and GND as close to the MK2746-01 as possible. For optimum device performance, the decoupling When the PCB traces between the clock outputs and the loads are over 1 inch, series termination should be used. To series terminate a 50Ω trace (a commonly used trace IDT™ USB-DVR CLOCK SOURCE 2 MK2746-01 REV E 051310 MK2746-01 USB-DVR CLOCK SOURCE CLOCK SYNTHESIZER impedance) place a 33Ω resistor in series with the clock line, as close to the clock output pin as possible. The nominal impedance of the clock output is 20Ω. be kept as short as possible, as should the PCB trace to the ground via. Distance of the ferrite bead and bulk decoupling from the device is less critical. Crystal Tuning Load Capacitors 2) The external crystal should be mounted just next to the device with short traces. The X1 and X2 traces should not be routed next to each other with minimum spaces, instead they should be separated and away from other traces. For a crystal input, a parallel resonant fundamental mode crystal should be used. Crystal capacitors must be connected between each of the pins X1 and X2 to ground. The value (in pF) of these crystal caps should equal (CL-6)*2. In this equation CL is equal to the crystal load capacitance in pF. As an example, for a crystal with an 18pF load capacitance, each crystal capacitor would be 24pF [(18-6)*2]=24. 3) To minimize EMI the 33Ω series termination resistor, if needed, should be placed close to the clock output. 4) An optimum layout is one with all components on the same side of the board, minimizing vias through other signal layers (the ferrite bead and bulk decoupling capacitor can be mounted on the back). Other signal traces should be routed away from the MK2746-01-01. This includes signal traces just underneath the device, or on layers adjacent to the ground plane layer used by the device. PCB Layout Recommendations For optimum device performance and lowest output phase noise, the following guidelines should be observed. 1) The 0.01µF decoupling capacitor should be mounted on the component side of the board as close to the VDD pin as possible. No vias should be used between decoupling capacitor and VDD pin. The PCB trace to VDD pin should Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK2746-01. 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 -0.5V to VDD+0.5V Ambient Operating Temperature 0 to +70° C Storage Temperature -65 to +150° C Soldering Temperature 260° C Recommended Operation Conditions Parameter Min. Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) IDT™ USB-DVR CLOCK SOURCE 3 Typ. Max. Units 0 +70 °C +3.0 +3.6 V MK2746-01 REV E 051310 MK2746-01 USB-DVR CLOCK SOURCE CLOCK SYNTHESIZER DC Electrical Characteristics VDD=3.3V ±10% , Ambient temperature 0 to +70° C, unless stated otherwise Parameter Symbol Conditions Min. Typ. Max. Units 3.6 V 0.8 V V V (VDD/2)+1 V Operating Voltage VDD 3.0 Input High Voltage Input Low Voltage Input High Voltage VIH VIL VIH 2.0 ICLK Input Low Voltage VIL ICLK Output High Voltage VOH IOH = -20 mA Output Low Voltage VOL IOL = 20 mA Output High Voltage (CMOS Level) VOH IOH = -4 mA Operating Supply Current IDD No load, OE=1 21 mA No load, OE=0 15 mA (VDD/2)-1 VDD/2 VDD/2 2.4 V 0.4 V VDD-0.4 V Short Circuit Current IOS ±50 mA Input Capacitance CIN 5 pF Nominal Output Impedance ZOUT 20 Ω On Chip Pull Up Resistor RPU 510 kΩ On Chip Pull Down Resistor RPD 240 kΩ AC Electrical Characteristics VDD = 3.3V ±10%, Ambient Temperature 0 to +70° C, unless stated otherwise Parameter Symbol Conditions Min. Input Frequency Typ. Max. Units 27 MHz Output Rise Time tOR 20% to 80% of VDD, Note 1 1.2 1.8 ns Output Fall Time tOF 80% to 20% of VDD, Note 1 1.2 1.8 ns Output Clock Duty Cycle tD at VDD/2, Note 1 50 55 % Maximum Output Jitter, short term tJ All clocks, except REF clocks Note 1 +75 ps REF clocks, Note 1 +150 ps 45 Output Enable time OE high to valid output (PLL running) 20 ns Output Disable time OE low to output disable 20 ns Note 1: Measured with 15pF load. IDT™ USB-DVR CLOCK SOURCE 4 MK2746-01 REV E 051310 MK2746-01 USB-DVR CLOCK SOURCE CLOCK SYNTHESIZER Package Outline and Package Dimensions (16 pin TSSOP, 4.40 mm Body, 0.65 mm Pitch) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters 16 Symbol E1 A A1 A2 b C D E E1 e L α aaa E IN D EX AR EA 1 2 D A 2 Min Inches Max -1.20 0.05 0.15 0.80 1.05 0.19 0.30 0.09 0.20 4.90 5.1 6.40 BASIC 4.30 4.50 0.65 Basic 0.45 0.75 0° 8° -0.10 Min Max -0.047 0.002 0.006 0.032 0.041 0.007 0.012 0.0035 0.008 0.193 0.201 0.252 BASIC 0.169 0.177 0.0256 Basic 0.018 0.030 0° 8° -0.004 A A 1 c -C e b S E A TIN G P LA N E L aaa C Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature MK2746-01GLF MK2746-01GLFT 274601GL 274601GL Tubes Tape and Reel 16 pin TSSOP 16 pin TSSOP 0 to +70° C 0 to +70° C "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 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. IDT™ USB-DVR CLOCK SOURCE 5 MK2746-01 REV E 051310 MK2746-01 USB-DVR CLOCK SOURCE CLOCK SYNTHESIZER 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 www.idt.com/go/clockhelp Corporate Headquarters Integrated Device Technology, Inc. www.idt.com © 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 IMPORTANT NOTICE AND DISCLAIMER RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (“RENESAS”) PROVIDES TECHNICAL SPECIFICATIONS AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. These resources are intended for developers skilled in the art designing with Renesas products. You are solely responsible for (1) selecting the appropriate products for your application, (2) designing, validating, and testing your application, and (3) ensuring your application meets applicable standards, and any other safety, security, or other requirements. These resources are subject to change without notice. Renesas grants you permission to use these resources only for development of an application that uses Renesas products. Other reproduction or use of these resources is strictly prohibited. No license is granted to any other Renesas intellectual property or to any third party intellectual property. Renesas disclaims responsibility for, and you will fully indemnify Renesas and its representatives against, any claims, damages, costs, losses, or liabilities arising out of your use of these resources. Renesas' products are provided only subject to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use of any Renesas resources expands or otherwise alters any applicable warranties or warranty disclaimers for these products. (Rev.1.0 Mar 2020) Corporate Headquarters Contact Information TOYOSU FORESIA, 3-2-24 Toyosu, Koto-ku, Tokyo 135-0061, Japan www.renesas.com For further information on a product, technology, the most up-to-date version of a document, or your nearest sales office, please visit: www.renesas.com/contact/ Trademarks Renesas and the Renesas logo are trademarks of Renesas Electronics Corporation. All trademarks and registered trademarks are the property of their respective owners. © 2020 Renesas Electronics Corporation. All rights reserved.