[sdiy] Opamp compatibility questions

[Mikael Mørup]

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 ?

Any pin compat. subs for these ?


2) Any pin compat. subs for Ca3140E ?


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

4) Any pin compat. subs for LM324 ?

5) Any pin compat. subs for LM1458 ?


I can probably get these older opAmps, but i would really
like to standardize around, and stock as few different as
possible.

Thanks in advance for your advice.

Mikael