LM211 vs LM311?

[aneevuser]

Am I right in thinking that an LM211 is identical to an LM311 with the exception of some slightly different max voltages and apparently rather better electrical characteristics (e.g. input offset voltage/currents)? Or have I missed some fundamental difference when skimming the datasheets?

The reason I ask is that the 211s seem to be a bit cheaper (through Farnell at least) in which case there seems to be little point in going for the 311s over the 211s, if they are more-or-less identical.

[Gyro]

Yes, just tighter spec, -40 - +85'C instead of 0 - 70'C Temp etc.


P.S. It's the same coding for most 'traditional' NS parts. Eg. LM301= Commercial, LM201 = Industrial, LM101 = Military.

[wraper]

The same IC with testing/binning to tighter spec.

[exe]

The reason I ask is that the 211s seem to be a bit cheaper (through Farnell at least) in which case there seems to be little point in going for the 311s over the 211s, if they are more-or-less identical.

It's interesting that 2xx is cheaper than 3xx. It should be another way around . My guess is people don't bother with 2xx, and, because of low demand, they had to put price lower.

I also won't be surprised if 3xx meets the spec of 2xx (due to progress in manufacturing process, unless they still use old equipment). But, of course, this is not guaranteed.

[aneevuser]

Thanks all. Clueless noob will note the 1xx/2xx/3xx classification for later reference.

As for prices, this is Farnell's DIP comparator offerings for the 211 and 311:

https://uk.farnell.com/w/c/semiconductors-ics/amplifiers-comparators/comparators?no-of-comparators=1-comparator&comparator-case-style=dip&st=311

[magic]

IME it's the obscure parts which are more expensive at distributors. Quite possibly the 211 grade is no harder to produce with modern technology than 311 so whichever moves in larger quantities (see stock levels) gets cheaper because otherwise the base price is the same.

[exe]

As for prices, this is Farnell's DIP comparator offerings for the 211 and 311:

Wait, one part is LMxxx, and another one is LPxxx. Those are different parts, imho.

[aneevuser]

As for prices, this is Farnell's DIP comparator offerings for the 211 and 311:

Wait, one part is LMxxx, and another one is LPxxx. Those are different parts, imho.

The first is an LM211P at £0.373 in small quantities, the third is an LM311P at £0.435 in small quantities, at least on the page that I'm seeing - maybe you're getting something different for some reason (cookie maybe?)