RE: Tempest DAC

> This is completely from memory, but I believe there is a difference
> between the 4066 and the 74LS4066, and I *thought* the 74LS4066
> allowed for a larger voltage swing which I *thought* was +/- 15v.
>
Hmmm. If I recally correctly the 4066 was sort of the "positive supply"
version of the 4016. (The 4016 could have a +/-7V supply or whatever
the CMOS would take, but the 4066 could only have up to a +7V supply?)

> But I could have it backwards, anyone have a some reference books to
> verify this?
>
Seems like you see 74CD40xx or 74HCT40xx or similar parts. (CMOS
versions of the CD40xx family with the TTL 74 prefix.) The 74LS4066
might be possible with the LS process since it would kinda jive with the
CD4066's supply range. I'd think that a 74LS4016 would not be possible
though.

> The 4016 and the 4066 also had different voltage ranges, and different
> internal resistances.
>
Right-- I think the 4016 could take a bipolar supply (see above).

-Clay
Received on Tue Jun 1 13:14:22 1999