MK1705A RENESAS | Alldatasheet

Document overview

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  • PDF pages: 7

Technical content

Features

  • 8-pin SOIC package
  • Provides a spread spectrum output clock
  • Supports ATI’s flat panel controllers
  • Accepts a clock input, provides same frequency dithered out put
  • Good for all VGA modes from 40 to 167 MHz
  • Peak reduction by 7 dB - 14 dB typical on 3rd - 19th odd har monics
  • Low EMI feature can be disabled
  • Operating voltage of 3.3 V or 5 V
  • Advanced, low power CMOS process Block Diagram Input Buffer PLL Clock Synthesis and Spread Spectrum Circuitry CLK S1:0 VDD GND Low EMI Enable Power Down Input Clock

ATI LOW EMI CLOCK GENERATOR SSCG IDT™ ATI LOW EMI CLOCK GENERATOR 2 MK1705A REV E 101308 Pin Assignment 8 pin (150 mil) SOIC Output Clock Selection Table Pin Descriptions External Components Series Termination Resistor Clock output traces over one inch should use series termination. To series terminate a 50Ω trace (a commonly used trace 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. Decoupling Capacitor A decoupling capacitor of 0.01µF must be connected between VDD and GND on pins 2 and 3 as close to the chip as possible. PCB Layout Recommendations For optimum device performance and lowest output phase noise, the following guidelines should be observed. The 0.01µF decoupling capacitor should be mounted on the component side of the board as close to the VDD pin as ICLK VDD GND CLK LEE PD1 pin 6 pin 7 Input/Output Range pin 1/pin 4 Frequency Spread vs. CLK 0 0 40 to 167 MHz Center ±1.25% 0 1 60 to 167 MHz Center ±0.5% 1 0 Test Test 1 1 40 to 100 MHz Center ±1% Pin Number Pin Name Pin Type Pin Description 1 ICLK XI Connect to a clock input as shown in table above. 2 VDD Power Connect to +3.3 V or +5 V. 3 GND Power Connect to ground. 4 CLK Output Clock output equal to input frequency. 5 LEE Input Low EMI enable. Turns on the spread spectrum when high. Internal pull-up. 6 S1 Input Frequency select 1 input. Selects input/output clock range per table above. Internal pull-up.

7 S0 Input

Frequency select 0 input. Selects input/output clock range per table above. Internal pull-up. 8P D Input Power down. Stops output low when this pin is low. Internal pull-up.

ATI LOW EMI CLOCK GENERATOR SSCG IDT™ ATI LOW EMI CLOCK GENERATOR 3 MK1705A REV E 101308 possible. No vias should be used between decoupling capacitor and VDD pin. The PCB trace to VDD pin should 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. The external crystal should be mounted just next to the d evice with short traces. The X1 and X2 traces should not b e routed next to each other with minimum spaces, instead th ey should be separated and away from other traces. 3) T o minimize EMI the 33Ω series termination resistor, if ne eded, should be placed close to the clock output. 4) An opt imum layout is one with all components on the same side of the board, minimizing vias through other signal la yers. Other signal traces should be routed away from the MK1705A. This includes signal traces just underneath the device, or on layers adjacent to the ground plane layer used by the device Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK1705A. 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. Recommended Operation Conditions Item Rating Supply Voltage, VDD 7 V All Inputs and Outputs -0.5 V to VDD+0.5 V Ambient Operating Temperature 0 to +70° C Storage Temperature -65 to +150° C Junction Temperature 125° C Soldering Temperature 260° C Parameter Min. Typ. Max. Units Ambient Operating Temperature 0 +70 ° C Power Supply Voltage (measured in respect to GND) +3.0 +5.5 V

ATI LOW EMI CLOCK GENERATOR SSCG IDT™ ATI LOW EMI CLOCK GENERATOR 4 MK1705A REV E 101308 Unless stated otherwise, VDD = 5 V, Ambient Temperature 0 to +70° C Unless stated otherwise, VDD = 5 V, Ambient Temperature 0 to +70° C Note 1: Measured with 15 pF load. Thermal Characteristics Parameter Symbol Conditions Min. Typ. Max. Units Operating Voltage VDD 3.0 5.5 V Supply Current IDD No load, 3.3V 20 mA No load, 5V 15 mA Input High Voltage V IH Clock input (VDD/2)+1 VDD/2 V Input Low Voltage V IL Clock input VDD/2 (VDD/2)-1 V Output High Voltage V OH IOH = -4 mA VDD-0.4 V Output High Voltage V OH IOH = -25 mA 2.4 V Output Low Voltage V OL IOL = 25 mA 0.4 V Input Capacitance C IN S0 pin 7 pF Nominal Output Impedance Z OUT 20 Ω Internal Pull-up Resistor R PU LEE pin only 500 k Ω Parameter Symbol Conditions Min. Typ. Max. Units Input Frequency 40 167 MHz Input Clock Duty Cycle Time above VDD/2 20 80 % Output Rise Time t OR 0.8 to 2.0 V, Note 1 1.5 ns Output Fall Time t OF 2.0 to 0.8 V, Note 1 1.5 ns Output Clock Duty Cycle Time above 1.5 V 40 50 60 % Output Clock Frequency Variation from Mean LEE high ±0.5 2.5 % EMI Peak Frequency Reduction 3rd - 19th odd harmonics 7 14 dB Parameter Symbol Conditions Min. Typ. Max. Units Thermal Resistance Junction to Ambient θJA Still air 150 ° C/W θJA 1 m/s air flow 140 ° C/W θJA 3 m/s air flow 120 ° C/W Thermal Resistance Junction to Case θJC 40 ° C/W

ATI LOW EMI CLOCK GENERATOR SSCG IDT™ ATI LOW EMI CLOCK GENERATOR 5 MK1705A REV E 101308 Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Body) Package dimensions are kept current with JEDEC Publication No. 95

Ordering Information

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 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. Part / Order Number Marking Shipping Packaging Package Temperature MK1705A MK1705A Tubes 8-pin SOIC 0 to +70 ° C MK1705ATR MK1705A Tape and Reel 8-pin SOIC 0 to +70 ° C MK1705ALF MK1705AL Tubes 8-pin SOIC 0 to +70 ° C MK1705ATRLF MK1705AL Tape and Reel 8-pin SOIC 0 to +70 ° C INDEX AREA 1 2 D E SEATING PLANE A e - C - B .10 (.004) C C L H h x 45 Millimeters Inches Symbol Min Max Min Max A 1.35 1.75 .0532 .0688 A1 0.10 0.25 .0040 .0098 B 0 . 3 30 . 5 1. 0 1 3. 0 2 0 C 0.19 0.25 .0075 .0098 D 4.80 5.00 .1890 .1968 E 3.80 4.00 .1497 .1574 e 1.27 BASIC 0.050 BASIC H 5.80 6.20 .2284 .2440 h 0 . 2 50 . 5 0. 0 1 0. 0 2 0 L 0 . 4 01 . 2 7. 0 1 6. 0 5 0 α 0° 8° 0° 8°

© 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 a nd marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA Corporate Headquarters Integrated Device Technology, Inc. www.idt.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 For Tech Support www.idt.com/go/clockhelp Innovate with IDT and accelerate your future networks. Contact: www.IDT.com MK1705A ATI LOW EMI CLOCK GENERATOR SSCG

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