ICST MK1411STR, MK1411S, MK1410STR Datasheet
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 20µA.
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
S1
S0
PD
14.31818 MHz
crystal
or
clock
MDS 1410/11 E 1 Revision 102298 Printed 11/15/00
X1
X2
Clock
Buffer/
Crystal
Oscillator
Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•(408)295-9800tel•www.icst.com
GND
Clock Synthesis
and Control
Circuitry
Output
Buffer
Output
Buffer
NTSC or
PAL clock
14.31818 MHz
(MK1410 only)
MK1410/MK1411
NTSC/PAL Clock Source
Pin Assignment
1 8
2
3
4
MK1411
7
6
5
X1/ICLK
VDD
GND
14.3M
1 8
2
3
4
7
6
5
X2
PD
SEL
NPCLK
X1/ICLK
VDD
GND
NPCLK
MK1410
NTSC/PAL Clock - MK1411
NTSC/PAL Clock - MK1410
SEL NPCLK ppm error
pin 6 pin 5 (MHz)
0 17.73448 5 ppm
1 14.31818 0 ppm
S1 S0 NPCLK ppm error
pin 5 pin 6 pin 4 (MHz)
0 0 35.46896 5 ppm
0 1 17.73448 5 ppm
1 0 28.63636 0 ppm
1 1 14.31818 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.
X2
PD
S0
S1
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 0.1µF 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.
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
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