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Subject: Re: Is this chip suitable for video signal switching?
Date: Fri, 17 Jan 2003 21:18:30 +0000
NNTP-Posting-Date: Fri, 17 Jan 2003 22:18:30 MET
> I pulled an MC14066B chip out of an old video although I'm not sure what its
> function was in there. However, I'd like to use to to switch a video signal
> (ie. the composite signal in a SCART cable) and was wondering if anyone knew
> if it was suitable for this (basically, I want to use it to multiplex
> between the normal signal and black/white (0.3/1.0V) signals, so I can
> overlay text onto a picture using a PIC). The data sheet just says its a
> Quad Analog Switch/Multiplexer but I don't know if it's suitable for signals
> as fast as video signals. I've put a copy of the data sheet on the web at
> http://www.xs4all.nl/~barryxs/MC14066B.pdf if anyone wants to see it.
I think it will transfer teh video signals fine, but siwthces too slow to switch
in and out on a pixel level.
A 74hc4066 will do much better, but has a 5 volt power supply max I think. At
max voltage these things work fastest.
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