phb.hfx at gmail.com
Tue Dec 20 18:58:35 CST 2016
On 2016-12-20 8:50 PM, Adrian Graham wrote:
> Evening folks,
> (it's evening here)
> Typically for troubleshooting around $FESTIVAL I find a more-than-likely
> dead MC14081B (CMOS quad dual-input AND gates) just as UK postage ends for
> the next few days so getting a replacement won't happen until next week.
> Question is, aside from having to make up an adapter board to change the
> pins around and making sure Vcc is +5V is there any reason I can't use
> something like a 74LS08 for testing? One of the outputs is RESET for an
> 8085A so nothing too demanding.
If one of the other outputs is driving a CMOS device the output may not
go high enough to satisfy it, however I would expect the reset input on
the 8085A to be TTL compatible.
> (I might have a CD4081B somewhere too, which is pin compatible according to
> the datasheet)
Same component Motorola prefixed their 4000 series CMOS numbers with a 1
to be different.
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