multiplexing 2 Sim Cards....

[tariq7868]

Hello, i want to connect 2 sim cards to a GSM module. And wants to select Sim card through microcontroller.i tried using buffer for selecting sim card, but Main problem comes when it come to selection of I/O pin, b/c as it is a bi-directional pin so i cant use 74ls245 b/c it needs the direction of the data to be told...so what should i do ? attached image is of what i want to do, but i cant think up of transcievers that could be used,....
thanks


PS: i dont want to use relay, b/c i made need to add 1 or 2 more sim cards, so us of relays wont be feasible.

 

[crutschow]

A bidirectional (analog) mux such as one of these should work to switch the bidirectional pins.

 

[tariq7868]

Thanks Alot, it is working