analog switching with ICs

[ulaska]

Hello,
i want to build this with a mux or something..
there is 4 channel select,
the selected channel's pin must be pulled down to GND.

CH1 ----O
CH2 ---O <----O---| GND
CH3 ---O
CH4 ----O



how can it be ?? i will use GPIOs for controlling the switch IC.
which IC (mux or etc.) i must use?

thanks and regards..

 

[mcoster]

Hi,

You can try these analog switches CD4066. Its main application is to multiplex or demultiplex analog signals. They are pretty easy to use, just like normal switches but they have a control pin to make it close (lot alike a relay...)
Check its data sheet at: hxxp://www.fairchildsemi.com/ds/CD/CD4066BC.pdf

hope i could help
mcoster

 

[IanP]

Another option is to use CD4051 (part of it) or CD4052 (1/2 of it - see picture below) ..
It is almost like having CD4066 CMOS switches with some additional logic ..

Regards,
IanP