[sdiy] Opamp compatibility questions

[Kevin Lightner]

>Hello list
>
>I have a few questions about some "older" opamps and
>possible pin compatible substitutes, prefereably in the
>TL0xx series, as i am stocking them already, but anything
>modern will do.
>
>1) What is the difference between NE5534A and Ne5534AN ? and
>is there a reason that a circuit should use one of each for
>what looks like very similar pre. amp. tasks ?

I think they're the same, but maybe someone will correct me.
Possibly a different grade.

>Any pin compat. subs for these ?
>
>
>2) Any pin compat. subs for Ca3140E ?

Not that I know of.

>
>
>3) Am i correct in assuming that TL084 can substitute LM348
>?

Not always.  Some circuits want that same FET input.

>4) Any pin compat. subs for LM324 ?

TL075? (I really don't recall)

>
>5) Any pin compat. subs for LM1458 ?
>

Tons.
Even the 4558 is an overall improvement.


-- 
Regards,
Kevin Lightner

http://www.synthfool.com