MK9173-01 Integrated Circuit System, MK9173-01 Datasheet - Page 4

• Manufacturer Part Number: MK9173-01
• Description: Video Genlock PLL
• Manufacturer: Integrated Circuit System

Using the MK9173-01/15 to
replace the AV9173-01/15
Increasing leadtimes from our wafer fab on the AV917x family
of products led us to introduce the MK917x family. The
MK917x have been designed for a 0.6 micron CMOS process,
whereas the AV917x devices are on a 1.2 micron process.
There are characteristic differences between the old and new
products which may lead to problems in the application. The
most commonly reported problem is increased jitter.
Design Considerations
The primary difference between old (AV) and new (MK)
products is that the MK series is built on a faster process. To
compensate for this process difference, we recommend the
following design considerations.
1. Because the MK series is faster, good power supply
decoupling is more important. A board layout which works
well with the AV parts may require better decoupling to work
with the MK parts. The recommended decoupling is 0.01 uF
mounted as close as possible (within 0.2") to the VDD pin (if a
larger value device is in place, such as a 0.1 uF, try replacing
this with a 0.01 uF device). To determine if improved
decoupling would help performance, connect a disc capacitor
directly across the VDD and ground pins. Trim the leads as
short as possible.
MK9173-01
MK9173-15
Integrated Circuit Systems, Incorporated • 525 Race Street •San Jose • CA• 95126 • [phone] tel • www.icst.com
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2. Due to differences in behavior between the AV and MK
parts, the MK parts may not be a viable substitute in some
applications. Accordingly, ICS is working to establish a new
source of supply for the AV part.
3. Keep in mind the following advice for PLLs, which might
help you troubleshoot problems in migrating to the MK917x
family:
a) Don't open the external clock feedback path. In doing so,
the MK917x will start to run as its maximum frequency, which
might be faster than the logic in your feedback path is able to
handle.
b) Fast transitions on the input pins reduce jitter. Remove any
filters or unneeded loads on the inputs.
c) Terminate the clock output lines properly. Try adding a 33
ohm series termination resistor.
For new video genlock applications, please consider the
ICS673-01, ICS1522, or ICS1523.