with a cpld, you'll get about 20% more expensive, but you need much less
board space...





Tal Dayan <tal@ZAPTA.COM>
Gesendet von: pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
20.06.02 16:43
Bitte antworten an pic microcontroller discussion list


        An:     PICLIST@MITVMA.MIT.EDU
        Kopie:
        Thema:  Re: Antwort: [PIC]: cheapest way for adding output pins ?


Which result in about 4c per output pin.

Translated to CPLD, 100 output device should
cost 4$. Is this a reasonable price for a 100 output pin CPLD (or metal
mask
equivalent) in large quantities ?

Tal

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Bob Ammerman
> Sent: Thursday, June 20, 2002 4:29 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: Antwort: [PIC]: cheapest way for adding output pins ?
>
>
> er... that should be 0.32 each, not 0.032 each.
>
> Bob
>
> ----- Original Message -----
> From: "Bob Ammerman" <rammerman@ADELPHIA.NET>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Thursday, June 20, 2002 7:15 AM
> Subject: Re: Antwort: [PIC]: cheapest way for adding output pins ?
>
>
> > 74HC595 gives you serial in 8 out with a latch, exactly what you need.
> >
> > 0.032 each at Digikey in 100's 16pin SOIC
> >
> > Bob Ammerman
> > RAm Systems
> >
> >
> > ----- Original Message -----
> > From: "Martin Buehler" <Martin.Buehler@ASCOM.CH>
> > To: <PICLIST@MITVMA.MIT.EDU>
> > Sent: Thursday, June 20, 2002 2:32 AM
> > Subject: Antwort: [PIC]: cheapest way for adding output pins ?
> >
> >
> > > beside asics, there are also fpgas, which could eventually be
> > > interresting. with an altera 7128, you can get 84 outputs for
> about $9,
> or
> > > if you are happy with 0/3.3V, it drops by $1.
> > > for series production, you can migrate an altera design to
> clear logic.
> > > they produce asics based on fpga designs, with no nre cost. this
drops
> the
> > > price by about 2.
> > >
> > >
> > >
> > >
> > >
> > > Tal Dayan <tal@ZAPTA.COM>
> > > Gesendet von: pic microcontroller discussion list
> <PICLIST@MITVMA.MIT.EDU>
> > > 20.06.02 06:17
> > > Bitte antworten an pic microcontroller discussion list
> > >
> > >
> > >         An:     PICLIST@MITVMA.MIT.EDU
> > >         Kopie:
> > >         Thema:  [PIC]: cheapest way for adding output pins ?
> > >
> > >
> > > Hello,
> > >
> > > One of the designs I am working needs many (100 to 200) outputs pins
> (0/5V
> > > signal) controlled by a single mid size PIC. What is the cheapest
way
> > > (cents
> > > per output pin) adding output pins to a PIC ?
> > >
> > > This is a mass production product but an ASIC is out of
> question at this
> > > point.
> > >
> > > Speed is not an a primary issue so using reasonable serial
> communication
> > > is
> > > OK.
> > >
> > > Thanks,
> > >
> > > Tal
> > >
> > > --
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> > >
> > >
> >
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> >
> >
>
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