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From: Gerhard Hoffmann <dk4xp@arcor.de>
Newsgroups: sci.electronics.design
Subject: Re: Fast monostable with a transistpor array
Date: Fri, 14 Jun 2024 18:20:06 +0200
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Am 14.06.24 um 18:03 schrieb john larkin:

> I wonder if one could design really fast stuff with the HFA3046.
> Package parasitics look nasty. And the big package will force ugly PCB
> routing. You can plop a single tiny transistor wherever you want.
> 
> The HFA parts are either 5 NPNs or 5 PNPs, which is also awkward.

I did design a 1:1000 dual slope timer stretcher with them featuring
5 ps resolution. The nice thing was that temp effects cancelled.
We tested that with synthesized xtal ovens --> 1pps signal and a 
1.0000000??0001 pps that slowly drifted by.

With a space proof ceramic flat pack with even worse parasitics.
And yes, Methinks it was Harris before, bought up by Renesas.

cheers, Gerhard