Re: 7400 NAND Gate


"Nand Gate Luver" (slip@xxxxxxxxx) writes:
> "John Fields" <jfields@xxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:a0vhl1t26j3p3o5tme93cd96f0p7ak6app@xxxxxxxxxx
>> On Fri, 21 Oct 2005 13:47:49 +0100, "Nand Gate Luver"
>> <slip@xxxxxxxxx> wrote:
>>
>>>SN7400 series quad two input nand gate for multipurpose construction of
>>>positively any logic function you care to imagine.
>>
>> ---
>> SN7402 quad two input nor gate for multipurpose construction of
>> positively any logic function you care to imagine.
>>
>> --
>
> True, but nand based logic RULEZ OK!
>
>
Circa 1967, maybe.

After all, back then there was a limited selection of logic ICs. If
you needed something better, you often had to construct it from
the few common gate types. Indeed, in the days of RTL there was more
than one article about making your own simple RTL gates, so you'd
start with discrete components and build up from there.

By the time Don Lancaster wrote his "TTL Cookbook", circa 1974, those
equivalents were more about describing how the exotic gates like exclusive-or,
worked, rather than because anybody needed to build one up from a 7400.

Michael


.

Relevant Pages