[sdiy] Silver series TL074/84 op amps

Gordonjcp gordonjcp at gjcp.net
Sat Mar 19 20:36:17 CET 2016

On Sat, Mar 19, 2016 at 07:27:56PM -0000, Tim Stinchcombe wrote:
> Hi list,
> 	I'm hoping someone here can shed some light on what the 'special
> purpose' of the silver-painted TI op amps were, which I've seen on several
> occasions. The chips are clearly painted with silver paint and re-marked,
> which in today's times of blacktopped counterfeit ICs looks very suspicious,
> but back then (and I'm not sure when 'then' was either!) must have been seen
> as acceptable. I'm presuming this was some sort of post-encapsulation
> sorting for some parameter or other, thus giving a 'premium' chip?

I'm not sure it is that special?  I've got some silver-topped NE556es here, I can't see them being particularly amazing.

Gordonjcp MM0YEQ

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