[dorkbotpdx-blabber] Re: Synth chip (SN76477) Group Order

[Laen]

Here's datasheet #1, showing the 600mil * .1" pin spacing:
  http://docs.bgmicro.com/pdf/ics76477.pdf

..and here's datasheet #2, showing the 400mil * .07" pin spacing:
  http://mkv.itm.miun.se/personal/per/diy/76477/sn76477datasheet.pdf


I took a shot at making an eagle part for it:
  http://content.laen.org/electronics/SN76477.lbr

..And a breakout board to get it up to a 600mil, .1" pin spacing:
  http://content.laen.org/electronics/SN76477.brd

The trace sizes on it should be good enough for home etching.

-Laen

On Jul 6, 1:54 pm, "Greg Grunest" <g... at grunest.com> wrote:
> Where did you find that?  I looked on the web for another half hour figuring
> it would be easy to find.  Oh well.  I bow down to your web searching
> skills!  Maybe you can find my old college girlfriend and that guy who owes
> me money.
>
> -----Original Message-----
> From: dorkbotpdx-blabber-boun... at dorkbot.org
>
> [mailto:dorkbotpdx-blabber-boun... at dorkbot.org] On Behalf Of Laen
> Sent: Monday, July 06, 2009 1:50 PM
> To: dorkbotpdx-blab... at dorkbot.org
> Subject: [dorkbotpdx-blabber] Re: Synth chip (SN76477) Group Order
>
> According to the data sheet, the pin spacing is .07" (versus the
> normal .1" pin spacing), and the Wikipedia page says the chip came in
> a .6" wide DIP or a .4" wide DIP.  It looks like we're getting the
> second one, which would be a .4" DIP with .07" pin spacing.
>
> Pretty weird!
>
> -Laen
>
> On Jul 6, 12:45 pm, Jesse Mejia <jme... at tffenterprises.com> wrote:
> > .04" maybe? What's standard?
>
> > On Sun, 5 Jul 2009 22:44:06 -0700
> >   "Greg Grunest" <g... at grunest.com> wrote:
>
> > > Thanks for the clarification.  In looking at the board for the SN
> > >voice
> > > project (in the link you provided), you can clearly see in the
> > >picture the
> > > odd spacing of the SN76477 chip compared to the other ICs  around
> > >the 76477.
> > > It even looks like a copy of the BG Micro breakout board.  It must
> > >be some
> > > sort of .07" or .05" spacing on the chip pins.
>
> > >From: dorkbotpdx-blabber-boun... at dorkbot.org
> > > [mailto:dorkbotpdx-blabber-boun... at dorkbot.org] On Behalf Of Jesse
> > >Mejia
> > > Sent: Saturday, July 04, 2009 8:46 AM
> > > To: A discussion list for dorkbot-pdx (portland, or)
> > > Subject: Re: [dorkbotpdx-blabber] Synth chip (SN76477) Group Order
>
> > > The SN76477 was produced in 2 form factors - standard dip, and a
> > >narrower
> > > version. (0.4" row sapcing I believe)
>
> > > The BG micro lady told me the chips they have in stock are the
> > >narrower
> > > version - she didn't specify the exact spacing but after doing some
> > >internet
> > > hunting it looks like they will likely be 0.4". She recommended the
> > >breakout
> > > board to solve this.
>
> > >FYI today I found this socket at digikey:
>
> > >http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail
>
> <http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ED22...
> > >> &name=ED22284-ND
>
> > > Which I believe will work. Maybe if enough ppl order them w/ the
> > >next normal
> > > dorkbot group order they'll be cheap!
>
> > > I need to verify the pin spacing - so far all I know for sure is
> > >that the
> > > chips BG micro carries fit the little breakout board they also
> > >carry.
>
> > >For what it's worth..  if anyone is interested in the SN voice
> > >project.. I
> > > *think* these pcbs are still available
> > >http://mypeoplepc.com/members/scottnoanh/smselectronicssnvoicepcboard/
>
> > > These things accept both versions of the chip.
>
> > > -Jesse
>
> > > On Jul 3, 2009, at 3:31 PM, Greg Grunest wrote:
>
> > > I was wondering if someone could tell me what the breakout board was
> > >for.
> > > The chip specs posted on the BGmicro
> > > sitehttp://docs.bgmicro.com/pdf/ics76477.pdfshowthe IC as having
> > >standard
> > > 10th inch spacing (100mils x 600mils).
>
> > > Has someone seen the breakout board?  Is there something I'm
> > >missing?  Do I
> > > really need it?
>
> > > Should I have attended Don's class and then I could make whatever
> > >boards I
> > > wanted and therefore control the universe? (insert maniacal laughter
> > >here)
>
> > > Probably.
>
> > >  _____  
>
> > >From: dorkbotpdx-blabber-boun... at dorkbot.org
> > > [mailto:dorkbotpdx-blabber-boun... at dorkbot.org] On Behalf Of dan p
> > > Sent: Thursday, July 02, 2009 10:28 PM
> > > To: A discussion list for dorkbot-pdx (portland, or)
> > > Subject: Re: [dorkbotpdx-blabber] Synth chip (SN76477) Group Order
>
> > > ah, thanks. Now that I have my mad board etching skills (thanx Don)
> > >I'll try
> > > to make my own...
>
> > > On Thu, Jul 2, 2009 at 7:41 PM, Thomas Lockney
> > ><dorkbot... at dorkbot.org>
> > > wrote:
>
> > > dan p wrote:
>
> > > I think I missed the part about break out boards?
>
> > >>From Jesse's earlier email:
>
> > > Sweet! Yeah I'll go ahead and put together a group order for these
> > >little
> > > guys. I just called and checked stock - they have "plenty".
> > >Apparently the
> > > package is a little odd so there is also a $3 breakout board they
> > >offer for
> > > it. Let me know if you want it as well.
>
> > >http://www.bgmicro.com/index.asp?PageAction=VIEWPROD
> > > <http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=12925>
> > > &ProdID=12925
>
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