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
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(C
L
-18), where C
L
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
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
µA
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 25°C.
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
0-70°C
0-70°C
0-70°C
0-70°C
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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