[sdiy] thanks for replies - Blue LED

[harry bissell]

I believe it is true for the HC and HCT series as well... I do not
have any experience with the other low voltage families.

H^) harry

John Luciani wrote:
> On 10/22/06, harry bissell <harrybissell at prodigy.net> wrote:
>> John Luciani wrote:
>> > The problem with parallel inverters is that you either need to
>> > diode-or them
>> > together or place a series resistor between each output since the
>> > inverters
>> > may not switch at the same time. You could have one inverter high and
>> > one low
>> > (for a short time). It may be a small enough time that it would not
>> > matter I don't
>> > know. I have not seen designs with logic outputs paralleled (except
>> > for open-drain (or open-collector) devices).
>> If you are using 4000 series CMOS and they are in the same 
>> package...you can
>> parallel inverters. The switching points are VERY close, and the
>> inherent resistance
>> of the gates will do the rest. Don't parallel separate packages... all
>> best are off.
>
> Is this true for the HC and the various low voltage CMOS parts too or 
> just
> the 4000 series?
>
> (* jcl *)
>
>