substitute for TI TIL306/307 Display?

From: Tothwolf <tothwolf_at_concentric.net>
Date: Sat Jan 4 01:09:00 2003

On Fri, 3 Jan 2003, Joe wrote:
> At 06:01 PM 1/1/03 -0600, you wrote:
>
> > Oops, I have TIL311s, not the 306. I was thinking that the 311s were
> > still in production. I guess the 311 with a built-in BCD controller
> > must still be useful in current products.
>
> The 306/307s also have built in BCD decoders. I've been trying to find a
> data sheet on the 311 so that I can see what the difference is between
> it and the 306/307.

I have the datasheet for the 311 in pdf format if you'd like me to email
it to you. The 311 has a built-in BCD decoder, but not a counter, like the
306/307.

> > I'll make a note to check a couple of my local surplus dealers over
> > the next few weeks. If I find any TIL306 displays, I'll pick them up.
> > Should I also hunt for any 307s?
>
> 306's or 307s will work equally well. The one difference between them is
> that one has the decimal point to the left of the digit and the other
> has the dp on the right. My unit doesn't use the decimal points so
> either display will work fine.

Ok, thats what I wanted to be sure of. Often devices didn't use the
decimal points, but I didn't want to assume that was the case.

> > If all else fails, would it be possible to salvage your displays? I've
> > carefully ground back ceramic and plastic on other dip components to
> > attach replacement leads in the past, but it isn't a fun task...
>
> It's possible but all the leads on them are weak and I'd probably have
> to eventually replace ALL the leads.

Been there, done that. I have a pile of early 74244s and other 7400 series
logic chips that have nearly nothing left of their leads due to the foam
that were stored in for roughly 15-20 years. Thankfully, the TIL311s and
most of the other chips that came in the same batch of parts didn't have
the same problem, though their leads had to be cleaned.

-Toth
Received on Sat Jan 04 2003 - 01:09:00 GMT