Dunno. The ones we use are $8 or so in quantity, but they aren't quite
big enough for your purposes. You'd need to talk to a Xilinx
distributor. The Altera parts are only from Arrow, and you could do the
same thing with them, of course.

Al Williams
AWC
* Floating point A/D
http://www.al-williams.com/awce/pak9.htm



> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Tal Dayan
> Sent: Thursday, June 20, 2002 9:43 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: cheapest way for adding output pins ?
>
>
> Thanks Al. I will take a look at the tuturial.
>
> What is the estimated cost per output 100 pin when using CPLD ?
>
> (assuming large quantities and surface mount)
>
> Thanks,
>
> Tal
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Al Williams
> > Sent: Thursday, June 20, 2002 6:14 AM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Re: [PIC]: cheapest way for adding output pins ?
> >
> >
> > Consider using a CPLD device. I have a tutorial for the
> Xilinx CPLDs
> > that includes a project that hooks up (I think) 32 I/O to a Basic
> > Stamp. The design could easily be expanded to handle more pins in a
> > 95108 device. Two of these would get you there. We don't sell the
> > expander per se as a product, but our Xilinx prototyping boards are
> > great for getting started with this type of technology.
> >
> > The other alternative, since you only need outputs, is a shift
> > register, but that is a whopping number of packages. The
> device in the
> > tutorial is really just a way to gang a bunch of shift
> registers, but
> > they are all in one semi-custom chip (and they are fairly
> cheap). With
> > a CPLD in PLCC packaging you'd need two. If you were willing to go
> > with surface mount (like a TQFP package) you could do it in one
> > package plus have enough spare to do some other things if
> you wanted
> > to.
> >
> > The tutorials (along with an Altera and PIC tutorial) are at
> > http://www.al-williams.com/pictutor
> >
> > Good luck!
> >
> > Al Williams
> > AWC
> > * Easy RS-232 Prototyping http://www.al-williams.com/awce/rs1.htm
> >
> >
> >
> > > -----Original Message-----
> > > From: pic microcontroller discussion list
> > > [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Tal Dayan
> > > Sent: Wednesday, June 19, 2002 11:18 PM
> > > To: PICLIST@MITVMA.MIT.EDU
> > > Subject: [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
> > >
> > > --
> > > http://www.piclist.com hint: To leave the PICList
> > > mailto:piclist-unsubscribe-request@mitvma.mit.edu
> > >
> >
> > --
> > http://www.piclist.com hint: To leave the PICList
> > mailto:piclist-unsubscribe-request@mitvma.mit.edu
> >
> >
>
> --
> http://www.piclist.com hint: To leave the PICList
> mailto:piclist-unsubscribe-request@mitvma.mit.edu
>

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