On page two of this .pdf file Web Link is a NE555 circuit diagram - you
need to think carefully about what you mean by "has two inputs" and
draw a schematic diagram of what you want. The desire to "Have
everything in one silicon package" shouldn't preclude you from having
the circuit function that you want to use.
http://www.datasheetcatalog.org/datasheet/texasinstruments/ne555.pdfThe NE555 inputs are trigger edge, enable level, voltage control input and
the timing RC. The NE555 construct is *not* what is known as a long
range timer so has a downside LF limit of about 1.0 cycle second with
careful selection of the RC components. For a longer range timer a pure
digital circuit approach with a clock divider is recommended. It's possible
to fully synthesise the NE555 timer function by using the circuit blocks
shown in the .pdf file. Depending on what you want the NE555 already
has two inputs with the trigger and enable inputs, though they operate
differently.
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When is comes to switching utility voltages and power you need a buffer
amplifier known as a SSR solid state relay. Or one can design an SSR
from triac electronic component for cost sensitive apps. Note that the
low frequency limit of the NE555 is somewhat in conflict with high power
switching, as an SSR will often wait until an input AC signal zero voltage
crossing before changing states. If you want a higher frequency signal
than 50/60 Hz. you have to start with 110VDC, for example, and find
an SSR that can do what you want.
:S:MarkSCoffman