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

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

Afer much searching and reading and learning i thought maybe i could build a compatible circuit to perform same function as SN75518 ? I think i can cascade 2 of the MAX6971 to cover what is used on the 75518.

could someone look at these and see if i am on track or lost ?

if lost... can someone give me a landmark ?

use 2 of these

formatting link

to build this (-2 od the outputs)

formatting link

to drive a 16 alpha-numeric char VFD (16 segment)

thanks for your time and help, rob

Reply to
robb
Loading thread data ...

Try this instead:

formatting link

-- Joe

Reply to
J.A. Legris

You're getting side-tracked. Replace the part using the previously recommended vendor and put the machine back together, before you get run over by a pie wagon.

Purchase a spare, if you suspect peripheral involvment in the original failure.

RL

Reply to
legg

find

build a

Thank Joe,

i have same reply as for others... Perfect suggestion if that chip was not as difficult to get as the SN75518N all those chips are availbale through brokers if you are spending $300+ dollars otherwise they do not want to help. but still a perfect suggestion

so that is reason i was trying to find an alternate solution with parts i can actually buy.

thanks again for help, robb

Reply to
robb 

--
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:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=620-1094-ND

It appears Arrow also has them:

http://app.arrownac.com/aws/pg_webc?s=P
Reply to
John Fields

Hi Rob, why give up SN75518N? what is the quantity you need for your project? if it is below 30k, you can continune to use it. we can support you at this item.

best regards, Peter snipped-for-privacy@expertonic.com

formatting link

Reply to
Peter

Shenzhen, China?!?! I think Rob wants *REAL* SN75518N's......

Reply to
GPE

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.