Grounding!!!

[Riss]

,,These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates‘‘ - I read this too late... ground yourself and the soldering iron through about a 1 megohm resistor when soldering operational amplifiers with CMOS input – for example TLC2264, TLV274 and the like. I work with a soldering iron powered by DC via a transformer. I have never had problems with CMOS series 4000, 74HC and TL064, TL074 , as well as those made in the United States and Mexico TLC274 .Years ago I did well when I grounded the soldering iron and myself and put a drop of water between the terminals of the unprotected Russian two-gate KP350 . But unfortunately today 2 chips OPA4196 gave up their spirit to God...

[Skippy]

It surprises me how modern semi parts are still reasonably robust regarding ESD. The ever-shrinking geometries, super-low power supply voltages, plus the generally high pin-count of IC's would make you expect them to be super-sensitive, even to the point of being unsuitable for hand assembly.

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I have a quantity of unprotected-gate fets, with the separate Substrate as well as D,G,S, they have a little springy brass loop around the leads. After soldering, you pull the loop off. Try that with SMD packages.

[Riss]

thanks, I know about that, I even have such old mosfets. but the grounding works – yesterday I tested 2 OPA4196, which I installed well grounded. they work great !