hi i am using cd4053b as switch between Tx and Rx

[24+]

hi i am using cd4053b as switch between Tx and Rx, but its not working... is any pull up resistor is required... any one help

thanks

 

[m.abdulshakeel]

i am not clear with what u are saying.... is ur using single sensor to tX and Rx

 

[24+]

yes.. i am using single sensor to TX and RX, but i have to switch my circuit such a way that, Tx should ON and RX should OFF, and vice versa. for this switching action i am using cd4053b, but its not working, thats why is any pull up resistor is required to connect between supply and terminal or else where...

 

[ctownsend]

Why don't you draw a simple schematic so others can see what you have done, and maybe offer some help.

 

[24+]

Why don't you draw a simple schematic so others can see what you have done, and maybe offer some help.

check this schematic...

 

[24+]

hi ctownsend, can u tell is any pull up resistors are required to work this switch for switching between TX and rx

 

[betwixt]

Assuming you are switching unipolar (not below ground voltage) and at low speed it should work. The only pull-up or pull-down you might need is on any input that should not be allowed to float. Note that a 4053 channel is high impedance when switched off and this could cause a floating condition.

Brian.

 

[24+]

Assuming you are switching unipolar (not below ground voltage) and at low speed it should work. The only pull-up or pull-down you might need is on any input that should not be allowed to float. Note that a 4053 channel is high impedance when switched off and this could cause a floating condition.

Brian.

is any solution for avoiding this floating condition.

 

[betwixt]

Just use a high value resistor from any connection that might be 'switched off' by the 4053. Without more information on your TX and RX devices it's difficult to be specific but 47KΩ to ground or supply should be sufficient to tie the connection one way or the other.

Brian.