> this basic pinout for a 709 but it says that pins 8 and 5 are 'Input Freq Compensation'. Pin 5 is marked 'Output Freq Comp'.
Yes, the non-standard pins can be anything. 709 had a very complicated compensation and used all of them. Other amps have different compensation and balance; but the pin-numbers for these pins will be the same can or DIP.
Pins 2, 3, 4, 6 and 7 will be the same function on any general purpose single opamp. Any other pinout confuses buyers, spoils sales, and complicates testing.
This is nearly true of Duals, though I think there are some oddballs.
There are at least 3 pinouts for Quads. Most are like TL074, but one early popular one is different, and some low-power quads use a pinout like a quad comparator.
> Pin 4 is connected to the can...be warned!
Nearly all metal-can packages solder the chip to the can. On transistors, this is usually the Collector junction. On ICs, it is almost always "V-", the substrate (the bulk of the die) which is conventionally negative of all nodes to keep parasitic junctions "off". Soldering the die to the can improves heat dissipation; also avoids the problem of finding a good electrical insulator with good mechanical and thermal properties (epoxy was not well proven when cans ruled the world). But don't let the case short to anything.
You will get 0.1dB lower noise in your 5534 if you can find a TO-5 heatsink to put over it and keep it several degrees cooler.
