trying t build a replacement part for obsolete IC ?

Question

hello,I am trying to find a compatible replacement for an obsolete hard to findpart SN75518NAfer much searching and reading and learning i thought maybe i could build acompatible circuit to perform same function as SN75518 ?  I think i cancascade 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 theseto build this (-2 od the outputs)to drive a 16 alpha-numeric char VFD  (16 segment)thanks for your time and help,rob

J.A. Legris · Accepted Answer

Try this instead:--Joe

legg · Answer

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

robb · Answer

findbuild aThank Joe,i have same reply as for others...Perfect suggestion if that chip was not as difficult to get as the SN75518Nall those chips are availbale through brokers if you are spending $300+dollars otherwise they do not want to help.but still a perfect suggestionso that is reason i was trying to find an alternate solution with parts ican actually buy.thanks again for help,robb

John Fields · Answer

---You can actually buy an Allegro A6818SEP-T from Digi-Key for 5.06USD and if you want more than one, they have 3031 in stock:?name=620-1094-NDIt appears Arrow also has them:-- JF

Peter · Answer

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 atthis item.best regards,Peter

GPE · Answer

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

trying t build a replacement part for obsolete IC ?

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