[sdiy] 748 replacement??

[Oren Leavitt]

Dan Snazelle wrote:
> 
> in electronotes I often run into old chips
> 
> I often see the 748 being used.
> 
> can i replace this with either
> 
> a. any modern comparator?  like a 339? 311?
> 
> or
> 
> b. just use a tl072 as a comparator?
> 
> thanks


Hi Dan,

The 748 is an uncompensated op-amp, pin-compatable with the LM301. Both 
were often used as a comparator in many synth circuits.
If the freq compensation pins 1 and 8, or the "balance" pin 5, are not 
used, you might be fine with any gen-purp op amp. You can certainly use 
an LM301/LM301A in place of the 748 in these synth circuits.

- Oren