MK1573-02STR ICST [Integrated Circuit Systems], MK1573-02STR Datasheet

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MK1573-02STR

Manufacturer Part Number
MK1573-02STR
Description
Manufacturer
ICST [Integrated Circuit Systems]
Datasheet
MDS 1573-02 B
The MK1573 GenClock™ provides genlock
timing for video overlay systems. The device
accepts the horizontal sync (HSYNC) signal as the
input reference clock, and generates a frequency-
locked high speed output. Stored in the device are
the multipliers for 16 combinations of popular
frequencies for analog and digital TV and set-top
box systems. Frequency-locked outputs include
1X, 4X, and 8X the subcarrier frequencies of
NTSC and PAL systems, and 27MHz plus
13.5MHz for digital video systems. In most
selections, the chip recovers the HSYNC clock by
outputting a low jitter 50% duty cycle version of
HSYNC. Also available is an inverted recovered
HSYNC clock, and a double speed recovered
HSYNC clock.
MicroClock can customize this device for any
other different frequencies.
Description
Block Diagram
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel•www.icst.com
HSYNC
Input Clock
FS0-3
4
VDD
Buffer
Input
2
GND
2
GenClock
Synthesis
Circuitry
Control
1
Clock
and
Features
• Packaged in 16 pin narrow (150 mil) SOIC
• The -02 version has one frequency changed
• Exact ratios stored in the device eliminate the need
• Accepts HSYNC of 15.625kHz or 15.73426kHz
• Highly accurate frequency generation within 1 ppm
• Generates NTSC/PAL subcarrier frequencies, and
• Generates 27MHz and 13.5MHz
• 2X HSYNC clock available
• Recovered HSYNC clock available
• Inverted HSYNC clock available
• 4.5V to 5.5V operation
(32MHz was added), and tracks the HSYNC
better than the -01 version.
for external dividers
4X and 8X of those frequencies
OE (all outputs)
HSYNC to Video Clock
Output
Output
Output
Buffer
Buffer
Buffer
Revision 120497
MK1573-02
CLK1
CLK2
CLK3
Printed 11/15/00

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MK1573-02STR Summary of contents

Page 1

... Description The MK1573 GenClock™ provides genlock timing for video overlay systems. The device accepts the horizontal sync (HSYNC) signal as the input reference clock, and generates a frequency- locked high speed output. Stored in the device are the multipliers for 16 combinations of popular frequencies for analog and digital TV and set-top box systems ...

Page 2

... Frequency Select 3. Determines CLK outputs (with given input) per table above. Type Input output power supply connection MDS 1573-02 B Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel•www.icst.com GenClock Output Clocks Decoding Table MK1573-02 (MHz) Decode Address HSYNC FS3 FS3:0 (Hex) pin ...

Page 3

... External Components/Crystal Selection The MK1573 requires a minimum number of external components for proper operation. A 0.1µF low leakage capacitor (see Capacitor Selection on following page) should be connected between CAP1 and CAP2 as close to the chip as possible. A high quality ceramic capacitor is recommended. A decoupling capacitor of 0.1µF must be connected between VDD and GND pins (pins 2 and 3, 5 and 7) close to the chip, and 33 terminating resistors can be used on clock outputs with traces longer than 1 inch ...

Page 4

... CLK2 may benefit from a series 33 resistor connected close to the pin (not shown). Video Clock Multipliers/Accuracies In the table on page 2 are the actual multipliers stored in the MK1573-02 ROM, which shows that the accuracies are within one ppm for the output clocks. MDS 1573-02 B Integrated Circuit Systems, Inc. • ...

Page 5

... Clock Waveforms In addition to generating the video clock on CLK1 (pin 10), the MK1573 also outputs the recovered HSYNC clocks. On certain selections, a double speed recovered HSYNC clock is also available. These recovered clocks will have lower jitter than the HSYNC input due to the filtering action of the PLL. The jitter spectrum of the recovered clocks will be reduced at frequencies higher than the loop bandwidth ...

Page 6

... Part/Order Number MK1573-02S MK1573-02STR 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 ...

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