MK2712 ICST | Alldatasheet

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Technical content

Integrated Circuit Systems • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com The MK2712 is the ideal way to generate clocks for NTSC/PAL video encoders and decoders. Stored in the device are two sets of popular frequencies for NTSC and PAL. In an 8 pin SOIC, the chip can save component count, board space, and cost over surface mount crystals and oscillators, and increase reliability by eliminating one or two mechanical devices from the board. The power down pin turns off the device, drawing less than 20µA. ICS/MicroClock offers many other clocks for computers and computer peripherals. Consult us when you need to remove crystals and oscillators from your board. Block Diagram Description Features

  • Packaged in 8 pin SOIC
  • Ideal for chips such as Analog Devices AD722 and Brooktree BT819
  • Input clock frequency of 27.0000 MHz
  • Power down turns off chip
  • Output enable tri-states output for system testing
  • Frequencies are within 1 ppm with accurate input clock
  • Low jitter
  • Output clock frequencies of 14.31818MHz, 17.7345MHz, 28.6364MHz, or 35.46896MHz
  • 25mA drive capability at TTL levels
  • 3.3V or 5V supply voltage
  • Advanced, low power CMOS process
  • Insensitive to input clock duty cycle VDD GND PLL Clock Synthesis Circuitry

27.00 MHz

FS0, 1 PD OE

Integrated Circuit Systems • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com Number Name Type DescriptionDescription 2 VDD P Connect to +3.3V or +5V.Connect to +3.3V or +5V. 3 GND P Connect to ground.Connect to ground. 4 NPCLK O NTSC or PAL output clock. Selected by FS1, FS0 per tables above.NTSC or PAL output clock. Selected by FS1, FS0 per tables above. 5 FS1 I Frequency Select pin #1. Selects NTSC or PAL frequency per table above.Frequency Select pin #1. Selects NTSC or PAL frequency per table above. 8 FS0 I Frequency Select pin #0. Selects NTSC or PAL frequency per table above.Frequency Select pin #0. Selects NTSC or PAL frequency per table above. Pin Descriptions Key: I = Input, O = output, P = power supply connection Pin Assignment External Components/Crystal Selection A minimum number of external components are required for proper oscillation. Connect a 27.000 MHz clock to ICLK. A decoupling capacitor of 0.1µF should be connected between VDD and GND on pins 2 and 3, and a 33Ω terminating resistor should be used on the clock output if the trace is longer than 1 inch. 1 8 ICLK FS0 GND PDVDD OE 8 pin SOIC NPCLK Decoding Table FS1 FS0 NPCLK (MHz) Error (ppm) 0 0 14.31818 0.3 ppm 0 1 17.73447 0.3 ppm 1 0 28.63636 0.3 ppm 1 1 35.46894 0.3 ppm FS1

Integrated Circuit Systems • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability. 2. Typical values are at 25°C. Electrical Specifications Parameter Conditions Minimum Typical Maximum Units ABSOLUTE MAXIMUM RATINGS (note 1) ABSOLUTE MAXIMUM RATINGS (note 1) Supply Voltage, VDD Referenced to GND 7 V Inputs Referenced to GND -0.5 VDD+.5V V Clock Outputs Referenced to GND -0.5 VDD+.5V V Ambient Operating Temperature 0 70 °C Soldering Temperature Max of 10 seconds 260 °C Storage temperature -65 150 °C DC CHARACTERISTICS (at 5.0V unless otherwise noted)DC CHARACTERISTICS (at 5.0V unless otherwise noted) Operating Voltage, VDD 4.5 5.5 V Input High Voltage, VIH, input clock onlyICLK pin 3.5 2.5 V Input Low Voltage, VIL, input clock onlyICLK pin 2.5 1.5 V Input High Voltage, VIH 2 V Input Low Voltage, VIL 0.8 V Output High Voltage, VOH IOH=-4mA VDD-0.4 V Output High Voltage, VOH IOH=-25mA 2.4 V Output Low Voltage, VOL IOL=25mA 0.4 V Operating Supply Current, IDD No Load, FS1=1. FS0=1 13 mA Power Down Supply Current, IDDPD No Load 10 µA Input Capacitance 5 pF Actual Mean Frequency versus Target With exact ICLK 0.3 0.3 ppm AC CHARACTERISTICS (at 5.0V unless otherwise noted)AC CHARACTERISTICS (at 5.0V unless otherwise noted) Input Clock Frequency 27 MHz Input Clock Duty Cycle Time above 2.5V 20 80 % Output Clock Rise Time 0.8 to 2.0V 1.5 ns Output Clock Fall Time 2.0 to 0.8V 1.5 ns Output Clock Duty Cycle Time above 1.5V 40 50 60 % Absolute Maximum Clock Period Jitter, 15 pF Variation from mean ± 90 ps One Sigma Clock Period Jitter, 15 pF load 30 ps Absolute Maximum Clock Period Jitter, 15 pFVDD=3.3V ± 180 ps One Sigma Clock Period Jitter, 15 pF loadVDD=3.3V 50 ps

Integrated Circuit Systems • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Inc (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. Package Outline and Package Dimensions Inches Inches Millimeters Millimeters Symbol Min Max Min Max A 0.055 0.061 1.397 1.5494 b 0.013 0.019 0.330 0.483 D 0.185 0.200 4.699 5.080 E 0.150 0.160 3.810 4.064 H 0.225 0.245 5.715 6.223 e .050 BSC .050 BSC 1.27 BSC 1.27 BSC h 0.015 0.381 L 0.016 0.035 0.406 0.889 Q 0.004 0.01 0.102 0.254 8 pin SOIC

Ordering Information

Part/Order Number Marking Package Temperature MK2712S MK2712S 8 pin SOIC 0-70°C MK2712STR MK2712S Add tape and reel 0-70°C c A b D E H e h x 45° Q Pin 1 L