Re: TTL uncovered?

--- In CAD_CAM_EDM_DRO@y..., "mjf462001" <mjf462001@y...> wrote:

> Gretings,
>
> Is there an online source that explains what
> TTL signals are, what TTL stands for, specifications,
> or any further information on TTL signals?
>
> Thank You
> Matthew F

Matt, TTL stands for Transistor-Transistor Logic.
The devices used in TTL type controls have a 5 volt
power supply. Signals in TTL are considered LOW, or
OFF if the voltage is below 1 volt (approx.) and
is considered HIGH or ON if the signal is above 4 volts.
In the digital world everything is either 1 or 0, ON or OFF,
HIGH or LOW. TTL logic is used to do the "thinking" part of
controls and then a higher voltage is used to do the "work".
Usually 12 or 24 volts will be controlled by a relay, opto coupler,
or other type of driver that can handle the load and still be
driven by 5 volts input.

Gary