Hi All,
I am having some trouble working with the following 24V 8chan MUX from Intersil. The datasheet is here
Let me explain the situation.
For the above IC I have connected the A0 A1 A2 (signal select) lines and the EN and GND lines from my micro to the IC. The A0-A2 signals are pulsed periodically by the micro while the EN is held high at 3.3V.
I have one 24 volt power supply sharing the SAME ground as the micro (connected the negative terminal on the PSU to the gnd of the micro) acting as a 24V input to the mux.
Now this is probably where I am doing something stupid: I have connected the mux's V- line to ground and the V+ line to the SAME 24V power supply.
So what I am trying to do is have my power supply, power the IC through the V-,V+ lines AND create the signal that should appear on the D output of the MUX.
Now this doesn't work. In fact it fails horribly when I power the whole thing up by shorting my power supply. Thankfully the current clamp kicks in. Could someone explain to me what I am doing wrong?
Thank you very much for your time.
I am having some trouble working with the following 24V 8chan MUX from Intersil. The datasheet is here
Let me explain the situation.
For the above IC I have connected the A0 A1 A2 (signal select) lines and the EN and GND lines from my micro to the IC. The A0-A2 signals are pulsed periodically by the micro while the EN is held high at 3.3V.
I have one 24 volt power supply sharing the SAME ground as the micro (connected the negative terminal on the PSU to the gnd of the micro) acting as a 24V input to the mux.
Now this is probably where I am doing something stupid: I have connected the mux's V- line to ground and the V+ line to the SAME 24V power supply.
So what I am trying to do is have my power supply, power the IC through the V-,V+ lines AND create the signal that should appear on the D output of the MUX.
Now this doesn't work. In fact it fails horribly when I power the whole thing up by shorting my power supply. Thankfully the current clamp kicks in. Could someone explain to me what I am doing wrong?
Thank you very much for your time.