Dear Team,


I am using Arduino Nano for driving TMUX1208. The address lines, Enable and I/P are coming from Arduino Nano.

The output of the MUX is used for driving a BJT which is used for driving a relay. The Vil of TMUX1208 is 0.87V and the Vol of Arduino nano is 0.9V(IOL=20mA, VCC = 5V).

May I know will cause any issues in my circuit.I want the transistors(MMSS8050-H-TP) to be off when EN is low.

The input leakage current of TMUX1208 is ±0.005uA. So I assume Arduino Nano is Vol will never go to 0.9V and the transistor will be off when EN is low.
Please correct me if I am wrong.

MY CIRCUIT


DC SPEC of Arduino Nano

DC Spec of TMUX1208



Regards
HARI

 

If you're concerned about the Arduino's 0.9v output being a tiny bit above the maximum logic low level of the mux EN, perhaps you could use a voltage divider on the EN pin.

 

Are you actually having problems, or are you just worried about problems?

I can't see the Arduino Vol going anywhere near .9 with only a small load like that MUX.

 

The output of the MUX is used for driving a BJT which is used for driving a relay. The Vil of TMUX1208 is 0.87V and the Vol of Arduino nano is 0.9V(IOL=20mA, VCC = 5V).

Is the Nano port sinking 20mA? If it's just driving the multiplexer, the voltage won't be that high.

 

Are you actually having problems, or are you just worried about problems?

I can't see the Arduino Vol going anywhere near .9 with only a small load like that MUX.

I am just worried about problems.You are correct .Arduino Vol won't go anywhere near .9 with only a small load like that MUX.

Regards
HARI