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From: "al davis (ad252 AT freeelectron DOT net) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] The Chippocolypse is coming!
Date: Fri, 16 Oct 2015 21:17:12 -0400
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On Monday 12 October 2015, Bob Paddock 
(graceindustries AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> Looks mostly like Audio and Audio Op-Amps, among some Line
> Drivers and even a COP8micro (People really used those?)
> 
> That Corp makes studio grade parts:
> 
> http://www.thatcorp.com/

"That" is great if "that" makes what you need, but it's all 
special stuff.  What happens when "that" is EOL?

The big loss here is a high performance op-amp.  I use the 
LM4562 in some designs.  Can anyone recommend a truly comparable 
dual op-amp?  2.7 nv/rtHz noise, 45 mHz GBP, 20 v/us slew rate, 
drives 600 ohms.  I can find alternatives that might meet any 
one of those, but all???

At least when the 4562 is no longer available, since it is an 
op-amp with standard pinout, something else will work with only 
a minor performance hit.  The "minor performance hit" 
alternatives are mostly cheaper.