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MK1410/MK1411 NTSC/PAL Clock Source
Description
The MK1410 and MK1411 are the ideal way to generate clocks for NTSC/PAL video encoders and decoders. Stored in the devices are two or four popular frequencies for NTSC and PAL. In an 8 pin SOIC, the chips 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 20A. MicroClock offers many other clocks for computers and computer peripherals. Consult MicroClock when you need to remove crystals and oscillators from your board.
Features
* Packaged in 8 pin SOIC * Ideal for devices such as AD722/AD725 from Analog Devices and Brooktree BT819 * Input crystal or clock frequency of 14.31818 MHz * Power down turns off chip * Frequencies are within 5 ppm with properly tuned reference crystal or 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
Block Diagram
VDD GND
S1 S0 PD 14.31818 MHz crystal X1 or clock
X2
Clock Synthesis and Control Circuitry
Output Buffer
NTSC or PAL clock
Clock Buffer/ Crystal Oscillator
Output Buffer
14.31818 MHz (MK1410 only)
MDS 1410/11 E
1 Revision 102298 Printed 11/15/00 Integrated Circuit Systems, Inc.*525 Race Street*San Jose*CA*95126*(408)295-9800tel*www.icst.com
MK1410/MK1411 NTSC/PAL Clock Source
Pin Assignment
X1/ICLK VDD GND 14.3M 1 2 3 4 8 7 6 5 X2 PD SEL NPCLK X1/ICLK VDD GND NPCLK 1 2 3 4 8 7 6 5 X2 PD S0 S1
MK1411
NTSC/PAL Clock - MK1411
MK1410
NTSC/PAL Clock - MK1410
SEL pin 6 0 1 NPCLK pin 5 (MHz) 17.73448 14.31818 ppm error 5 ppm 0 ppm S1 pin 5 0 0 1 1 S0 pin 6 0 1 0 1 NPCLK pin 4 (MHz) 35.46896 17.73448 28.63636 14.31818 ppm error 5 ppm 5 ppm 0 ppm 0 ppm
Pin Descriptions
MK1410 MK1411 Name Type Description 1 1 X1/ICLK I Crystal Connection. Connect to a 14.31818 MHz crystal or clock. 2 2 VDD P Connect to +3.3V or +5V. 3 3 GND P Connect to ground. 4 14.3M O 14.31818 MHz buffered crystal clock output. 5 4 NPCLK O NTSC or PAL output clock. Selected by SEL pin per tables above. 5 S1 I Select pin. Selects NTSC or PAL frequency per tables above. 6 SEL I Select pin. Selects NTSC or PAL frequency per tables above. 6 S0 I Select pin. Selects NTSC or PAL frequency per tables above. Internal pull-up. 7 7 PD I Power Down. Active low. Clocks stop low. 8 8 X2 O Crystal Connection to a 14.31818 MHz crystal, or leave unconnected for clock input.
Key: I = Input, O = output, P = power supply connection
External Components/Crystal Selection
A minimum number of external components are required for proper oscillation. For a crystal input, a parallel resonant 14.31818 MHz, 18pF load, crystal is recommended. Do not use a crystal with lower load capacitance. It is possible to use a crystal with higher load capacitance. In this case, external capacitors must be connected from each of X1 and X2 to ground. The value of these caps equals 2(CL -18), where CL is the crystal load capacitance in pF. So for a 20 pF crystal, use 4 pF caps. The frequency tolerance of the crystal should be 30ppm or better. For a clock input, connect to X1 and leave X2 unconnected. A decoupling capacitor of 0.1F should be connected between VDD and GND on pins 2 and 3, and a 33 terminating resistor should be used on the clock output if the trace is longer than 1 inch.
MDS 1410/11 E
2 Revision 102298 Printed 11/15/00 Integrated Circuit Systems, Inc.*525 Race Street*San Jose*CA*95126*(408)295-9800tel*www.icst.com
MK1410/MK1411 NTSC/PAL Clock Source
Electrical Specifications
Parameter Supply Voltage, VDD Inputs Clock Outputs Ambient Operating Temperature Soldering Temperature Storage temperature Operating Voltage, VDD Input High Voltage, VIH, input clock only Input Low Voltage, VIL, input clock only Input High Voltage, VIH Input Low Voltage, VIL Output High Voltage, VOH Output High Voltage, VOH Output Low Voltage, VOL Operating Supply Current, IDD, 5.0V Operating Supply Current, IDD, 3.0V Power Down Supply Current, IDDPD, 5V Input Capacitance Actual Mean Frequency versus Target Conditions Referenced to GND Referenced to GND Referenced to GND Max of 10 seconds -65 3.0 3.5 2 0.8 IOH=-4mA IOH=-25mA IOL=25mA No Load, 17.7 MHz No Load, 17.7 MHz No Load SEL, PD pins With exact crystal VDD-0.4 2.4 0.4 16 9 25 7 5 Minimum Typical Maximum 7 VDD+.5V VDD+.5V 70 260 150 5.5 2.5 2.5 1.5 Units V V V C C C V V V V V V V V mA mA A pF ppm
ABSOLUTE MAXIMUM RATINGS (note 1)
-0.5 -0.5 0
DC CHARACTERISTICS (at 5.0V unless otherwise noted)
Clock input Clock input
5
AC CHARACTERISTICS (at 5.0V unless otherwise noted)
Input Clock or Crystal Frequency 14.31818 14.31818 MHz Input Crystal Accuracy 30 ppm 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 45 50 55 % Absolute Maximum Clock Period Jitter Variation from mean 130 ps One Sigma Clock Period Jitter 40 ps 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 25C.
Application Note
The MK1410/11 is commonly used to drive an AD722/4 NTSC/PAL encoder. If the encoder is not displaying the proper color, this means that the input frequency to the MK1410/11 is incorrect. This is caused by using the wrong type of crystal, or by connecting incorrect capacitors to X1 and X2. To get correct color, specify the crystal as listed on page 2. The MK1410/11 has internal crystal capacitors set for a crystal with 18 pF load capacitance. Contact MicroClock if unable to obtain the listed crystal.
MDS 1410/11 E
3 Revision 102298 Printed 11/15/00 Integrated Circuit Systems, Inc.*525 Race Street*San Jose*CA*95126*(408)295-9800tel*www.icst.com
MK1410/MK1411 NTSC/PAL Clock Source
Package Outline and Package Dimensions 8 pin SOIC
Symbol A b D E H e h Q Inches Min Max 0.055 0.068 0.013 0.019 0.185 0.200 0.150 0.160 0.225 0.245 .050 BSC 0.015 0.004 0.01 Millimeters Min Max 1.397 1.7272 0.330 0.483 4.699 5.080 3.810 4.064 5.715 6.223 1.27 BSC 0.381 0.102 0.254
E Pin 1
H
D Q e b c
h x 45 A
Ordering Information
Part/Order Number MK1410S MK1410STR MK1411S MK1411STR Marking MK1410S MK1410S MK1411S MK1411S Package 8 pin SOIC Add tape and reel 8 pin SOIC Add tape and reel Temperature 0-70C 0-70C 0-70C 0-70C
While the information presented herein has been checked for both accuracy and reliability, MicroClock Incorporated 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 MicroClock. MicroClock reserves the right to change any circuitry or specifications without notice. MicroClock does not authorize or warrant any MicroClock product for use in life support devices or critical medical instruments.
MDS 1410/11 E
4 Revision 102298 Printed 11/15/00 Integrated Circuit Systems, Inc.*525 Race Street*San Jose*CA*95126*(408)295-9800tel*www.icst.com

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