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'[EE] 16 to 1 Analog multiplexer?'
2007\06\21@220834 by William Couture

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Can anyone suggest a 16 to 1 analog multiplexer chip that uses 5V, like a
souped-up 74HC4052 or a 5V dg406b?

Yes, I could use 4 74hc4052 into a 5th 74hc4052, but I'm limited on board
space.  And, while 24V is available for th dg406b, a 5V chip would be
nicer.

Thanks,
  Bill

--
Psst...  Hey, you... Buddy...  Want a kitten?  straycatblues.petfinder.org

2007\06\21@222355 by Jinx

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I stripped some telcom boards for parts recently and got these
in PLCC

http://products.zarlink.com/product_profiles/MT8816.htm

No idea what I'll use them for yet, but probably worth having

2007\06\21@231031 by Robert Rolf

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Jinx wrote:

> I stripped some telcom boards for parts recently and got these
> in PLCC
>
> products.zarlink.com/product_profiles/MT8816.htm
>
> No idea what I'll use them for yet, but probably worth having

Video/audio switch matrix for you home theater system?

I vaguely recall there being an article in Circuit Cellar from about
a decade ago which used an 8051?? to interpret the IR commands sent
by a standard Sony remote, and control a video/audio multiplexer for the
home.
Time for the updated PIC version with component/composite/Y-C/surround
sound capability.
(Or just buy the Philips one at Walmart <G> for $40.).

R

2007\06\22@013936 by Nate Duehr

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On Jun 21, 2007, at 8:23 PM, Jinx wrote:

> I stripped some telcom boards for parts recently and got these
> in PLCC
>
> http://products.zarlink.com/product_profiles/MT8816.htm
>
> No idea what I'll use them for yet, but probably worth having

They're very useful for analog audio path switching inside Amateur  
Radio FM repeater controllers.  :-)

Mitel made some nice stuff, really.  The venerable MT8870 DTMF  
decoder is still used in an awful lot of stuff.  Mitel being gone, or  
hard to find, or whatever... (I forget), the clone of the 8870 made  
by California Microdevices (CM8870) is easier to come by.  That darn  
chip with it's variable capacitance filters will pull DTMF signals  
out of ridiculous amounts of noise, while also dealing with obscene  
amounts of both twist and skew.

Sure, DSP-based solutions can match or better it, but for ease of  
use, the 8870 is hard to beat in a discreet component.

I've seen the 8870 pull DTMF out of noisy FM radio signals that were  
well below the pseudo-industry-standard 12 dB SINAD "noisy signal"  
level.

The datasheets also have a pretty nifty description of how they do  
it, too... was fun to read while I was putting in some serious  
hobbyist study-time on op-amps and filters.

--
Nate Duehr
spam_OUTnateTakeThisOuTspamnatetech.com


2007\06\22@015930 by Kevin Timmerman

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Two 74HC4051 (8 to 1 mux) with the outputs tied together. Enable one
or the other, no need for a 2 to 1 mux.


At 10:08 PM 6/21/2007, you wrote:
{Quote hidden}

>

2007\06\22@080134 by William Couture

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On 6/22/07, Kevin Timmerman <.....listsKILLspamspam@spam@pcmx.net> wrote:

> Two 74HC4051 (8 to 1 mux) with the outputs tied together. Enable one
> or the other, no need for a 2 to 1 mux.

Hmmm...  so I'd use 3 address lines to each chip, with the 4th address
line used as the chip select (with an inverter for the 2nd chip select,
something like a 74hc1g00).  So it's 3 chips (or should I say 2 1/2 chips? :))
That's better, though I'd still like a 1 chip solution.

Thanks!
  Bill

> >Can anyone suggest a 16 to 1 analog multiplexer chip that uses 5V, like a
> >souped-up 74HC4052 or a 5V dg406b?
> >
> >Yes, I could use 4 74hc4052 into a 5th 74hc4052, but I'm limited on board
> >space.  And, while 24V is available for th dg406b, a 5V chip would be
> >nicer.

--
Psst...  Hey, you... Buddy...  Want a kitten?  straycatblues.petfinder.org

2007\06\22@081443 by Michael Rigby-Jones

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>-----Original Message-----
>From: piclist-bouncesspamKILLspammit.edu [.....piclist-bouncesKILLspamspam.....mit.edu]
>On Behalf Of William Couture
>Sent: 22 June 2007 13:02
>To: Microcontroller discussion list - Public.
>Subject: Re: [EE] 16 to 1 Analog multiplexer?
>
>
>On 6/22/07, Kevin Timmerman <EraseMElistsspam_OUTspamTakeThisOuTpcmx.net> wrote:
>
>> Two 74HC4051 (8 to 1 mux) with the outputs tied together. Enable one
>> or the other, no need for a 2 to 1 mux.
>
>Hmmm...  so I'd use 3 address lines to each chip, with the 4th
>address line used as the chip select (with an inverter for the
>2nd chip select, something like a 74hc1g00).  So it's 3 chips
>(or should I say 2 1/2 chips? :)) That's better, though I'd
>still like a 1 chip solution.

How about the 74HC4067? http://focus.ti.com/docs/prod/folders/print/cd74hc4067.html

Have you looked at Analog Devices?  They have a wide range of muxes up to 32:1, some even have SPI interface.
http://www.analog.com/en/subCat/0,2879,768%255F836%255F0%255F%255F0%255F,00.html

Regards

Mike


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2007\06\22@082717 by Alan B. Pearce

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>> Two 74HC4051 (8 to 1 mux) with the outputs tied together. Enable one
>> or the other, no need for a 2 to 1 mux.
>
>Hmmm...  so I'd use 3 address lines to each chip, with the 4th address
>line used as the chip select (with an inverter for the 2nd chip select,
>something like a 74hc1g00).  So it's 3 chips (or should I say 2 1/2 chips?
>:))
>That's better, though I'd still like a 1 chip solution.

CD4067/HEF4067/74HC4067

http://www.standardics.nxp.com/products/switches/4067/

2007\06\22@083129 by Carl Denk

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The inverter could be a simple transistor inverter, a small 3 pin
device, and probably 2 resistors. I use one to invert  a serial (going
one way into a MAX232, the other through the inverter to a fiber optic
transmitter). The fiber optic then gets converted to RD-485. I wold put
the device and design out, but, don't consider my expertise sufficient
for others. Sure someone else expert can help if need be.

Michael Rigby-Jones wrote:
>  
>> {Original Message removed}

2007\06\22@090533 by Pablo Ginhson

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No, you need only 3 address line and one enable line, this enable line with one inverter (74HC04) and that is all.
I used and work very well
Pablo Ginhson> Date: Fri, 22 Jun 2007 08:01:33 -0400> From: bcouturespamspam_OUTgmail.com> To: @spam@piclistKILLspamspammit.edu> Subject: Re: [EE] 16 to 1 Analog multiplexer?> > On 6/22/07, Kevin Timmerman <KILLspamlistsKILLspamspampcmx.net> wrote:> > > Two 74HC4051 (8 to 1 mux) with the outputs tied together. Enable one> > or the other, no need for a 2 to 1 mux.> > Hmmm... so I'd use 3 address lines to each chip, with the 4th address> line used as the chip select (with an inverter for the 2nd chip select,> something like a 74hc1g00). So it's 3 chips (or should I say 2 1/2 chips? :))> That's better, though I'd still like a 1 chip solution.> > Thanks!> Bill> > > >Can anyone suggest a 16 to 1 analog multiplexer chip that uses 5V, like a> > >souped-up 74HC4052 or a 5V dg406b?> > >> > >Yes, I could use 4 74hc4052 into a 5th 74hc4052, but I'm limited on board> > >space. And, while 24V is available for th dg406b, a 5V chip would be> > >nicer.> > -- > Psst... Hey, you... Buddy... Want a kitten? straycatblues.petfinder.org> -- >

2007\06\22@094113 by enkitec

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On 21 Jun 2007 at 23:39, Nate Duehr wrote:

>
> Sure, DSP-based solutions can match or better it, but for ease of  
> use, the 8870 is hard to beat in a discreet component.
>
> I've seen the 8870 pull DTMF out of noisy FM radio signals that were  
> well below the pseudo-industry-standard 12 dB SINAD "noisy signal"  
> level.
>

       I couldn't get them to work ok decoding DTMF from CDMA cell phones.
       Had to switch to an Atmel AVR running Goertzel algorithm.
       It solved the problem.

       Mark Jordan

2007\06\23@042628 by Nate Duehr

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On Jun 22, 2007, at 7:40 AM, RemoveMEenkitecTakeThisOuTspamgmail.com wrote:

> On 21 Jun 2007 at 23:39, Nate Duehr wrote:
>
>>
>> Sure, DSP-based solutions can match or better it, but for ease of
>> use, the 8870 is hard to beat in a discreet component.
>>
>> I've seen the 8870 pull DTMF out of noisy FM radio signals that were
>> well below the pseudo-industry-standard 12 dB SINAD "noisy signal"
>> level.
>>
>
>        I couldn't get them to work ok decoding DTMF from CDMA cell phones.
>        Had to switch to an Atmel AVR running Goertzel algorithm.
>        It solved the problem.
>
>        Mark Jordan

Noise is different than being mangled by a low-bandwidth CODEC.   :-)

--
Nate Duehr
spamBeGonenatespamBeGonespamnatetech.com



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