Searching \ for '[BUY]: multiplexers' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=multiplexers
Search entire site for: 'multiplexers'.

Exact match. Not showing close matches.
PICList Thread
'[BUY]: multiplexers'
2001\01\16@221414 by Tweedy Bird

picon face
Hi everyone,

I am looking for a smart analog multiplexer 4 to 1 or a smart switch.  If
anyone knows where I can find this part, please let me know.

Thank you for your time..
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

--
http://www.piclist.com hint: To leave the PICList
spam_OUTpiclist-unsubscribe-requestTakeThisOuTspammitvma.mit.edu


2001\01\17@085305 by Mitchell D. Miller

picon face
Sounds like a 4066 might be a candidate.

-- Mitch

-----Original Message-----
From: pic microcontroller discussion list
[.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU]On Behalf Of Tweedy Bird
Sent: Tuesday, January 16, 2001 9:15 PM
To: PICLISTspamKILLspamMITVMA.MIT.EDU
Subject: [BUY]: multiplexers


Hi everyone,

I am looking for a smart analog multiplexer 4 to 1 or a smart switch.  If
anyone knows where I can find this part, please let me know.

Thank you for your time..
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

--
http://www.piclist.com hint: To leave the PICList
.....piclist-unsubscribe-requestKILLspamspam.....mitvma.mit.edu

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\17@133551 by Dan Michaels

flavicon
face
Tweedy Bird wrote:

>I am looking for a smart analog multiplexer 4 to 1 or a smart switch.  If
>anyone knows where I can find this part, please let me know.
>

What on earth does "smart" mean?

Something like a 74HC4052 will give you a garden variety
dual 4x1 switch.

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\17@174835 by Stephen B Webb

flavicon
face
> >I am looking for a smart analog multiplexer 4 to 1 or a smart switch.  If
> >anyone knows where I can find this part, please let me know.


I too am looking for something similar.

I only need a 2:1 mux, but I need it to be suitable for switching NTSC
video signals quickly (ie 29.94 Hz, or whatever it is).  I need it to
switch between two sources between each frame, and it has to be "clean"
enough to not muck up the sync signal.

Any ideas?

-Steve

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\17@184159 by Chris Carr
flavicon
face
> > >I am looking for a smart analog multiplexer 4 to 1 or a smart switch.
If
> > >anyone knows where I can find this part, please let me know.
>
>
> I too am looking for something similar.
>
> I only need a 2:1 mux, but I need it to be suitable for switching NTSC
> video signals quickly (ie 29.94 Hz, or whatever it is).  I need it to
> switch between two sources between each frame, and it has to be "clean"
> enough to not muck up the sync signal.
>
> Any ideas?
>
Have you looked at Maxim
http://para.maxim-ic.com/SwitchMux.asp

Regards
Chris

p.s.  Switching at Frame Rate is not (in video terms) switching
"quickly" in fact this is the slowest switching rate.

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\17@191508 by Stephen B Webb

flavicon
face
> p.s.  Switching at Frame Rate is not (in video terms) switching
> "quickly" in fact this is the slowest switching rate.

Switching at frame rate is a heck of a lot quicker than my Sony home
theatre receiver will let me do.


I said "quickly" to impress that I didn't mean that I would be
switching once every few minutes or so - and that I need to maintain a
clean sync signal, etc.  (ie a relay ainn't gonna cut it)


-Steve

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\18@073748 by Roman Black

flavicon
face
Stephen B Webb wrote:
>
> > p.s.  Switching at Frame Rate is not (in video terms) switching
> > "quickly" in fact this is the slowest switching rate.
>
> Switching at frame rate is a heck of a lot quicker than my Sony home
> theatre receiver will let me do.
>
> I said "quickly" to impress that I didn't mean that I would be
> switching once every few minutes or so - and that I need to maintain a
> clean sync signal, etc.  (ie a relay ainn't gonna cut it)
>
> -Steve


Steve, in the TV industry is it common to use the cheap
4066 quad analog switch chip for AV switching. I buy them
by the bagful. They will switch at frame rate with no probs,
and will switch the standard "AV inputs/outputs" that come
from the back of your set. And they will commonly fail
with weird faults after 6+ years in a hot environment.
Especially the Toshiba brand chips. :o)
-Roman

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2001\01\18@073822 by Simon Nield

flavicon
face
steve:
>switch between two sources between each frame, and it has to be "clean"
>enough to not muck up the sync signal.

I have used maxim analog switches for this in the past. obtaining stock from them was at times a bit
scary as they were having some fab problems which they were not being too candid about.
'Standard' 4000 series analog muxers should do this job just fine (check the bandwidth specs to be
sure as I have only used them for audio, but I seem to remember they had plenty of bandwidth to
spare).
You will get better results if you buffer the video into and out of the muxers (iirc you can get
parts from Maxim with built in buffers).
Remember you ideally want to time your switching point to be in the vertical blanking interval so's
you don't get a visible switching point, this also means having locked video sources... if this is
for a home system then you won't be able to do this so you need not worry about trying, just means
you'll get a splat & probably some roll as you switch the signals.

Regards,
Simon

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2001\01\19@172037 by Peter L. Peres

picon face
>What on earth does "smart" mean?

Sellspeak for >= 1 CMOS inverter used in the drive logic of the
multiplexer.

Peter

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.


2001\01\19@172049 by Peter L. Peres

picon face
>I only need a 2:1 mux, but I need it to be suitable for switching NTSC
>video signals quickly (ie 29.94 Hz, or whatever it is).  I need it to

NJRC NJM22xx video buffers/switches I think.

Peter

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.


More... (looser matching)
- Last day of these posts
- In 2001 , 2002 only
- Today
- New search...