1. Home
  2. Electronics Design
  3. Re: trying t build a replacement part for obsolete IC ?

Re: trying t build a replacement part for obsolete IC ?

>

> >> > >> > hello, > >> > I am trying to find a compatible replacement for an obsolete hard to > >find part SN75518N > >> > > >> > >> Try this instead: > >>
formatting link
> >> Joe > >> > > > >Thanks Joe, > >i have same reply as for others... > >Perfect suggestion if that chip was not as difficult to get as the

SN75518N

> --- > You can actually buy an Allegro A6818SEP-T from Digi-Key for 5.06 > USD and if you want more than one, they have 3031 in stock: >

formatting link
?name=620-1094-ND

> It appears Arrow also has them: >
formatting link
> JF >

Well John, how embarassing :}?

but, i 'd rather be embarassed with chip than honored and chipless. as it turns out i was looking for ucn6818 like the ucn5818 so a partial

6818sep helped

so do you have a idea for simple conversion of the PLCC pkg to DIP-40 an adapter perhaps ???

thanks for chimeing in, robb

Reply to
robb
Loading thread data ...

--
Probably, but they\'re usually hideously expensive.

Was the 75518 soldered in or socketed?
Reply to
John Fields

to

D

soldered robb

Reply to
robb

FWIW, I have heard for people emulating obsolete chips with microcontrollrs or PALs. I wouldn't be surprised if that's what you would get if you ordered a significant number of them from an Asian supplier.

Al

Reply to
Al

you know after doing all this searching for the chip i was going to ask a question along those lines but then i thought i would get some feedback like

yea you can with $900 chip burner and $250 programming software, couple of months microcode/controler development experience and a couple of weeks of testing and you better buy a tube of chips in case you fry a couple and then you need a testing board and setup ........

so i did not ask :) robb

Reply to
robb

"robb" wrote in news:13f09a1cpvt8921 @corp.supernews.com:

To build?

If there is room; An adequate sized perf board with two rows od common .1" headers, perhaps with mating sockets on the one board. Also on the perf board woth be a PLCC socket with through hole .1" pins, the socket point-to-point wired to the headers. A little less witing, and you can use a surface mount socket, or solder the chip down, if you fab a PCB.

Reply to
Gary Tait

I'd try

formatting link
Their adapters are way less expensive than comparable parts.

Steve

Reply to
steve_schefter

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.