Looking at the datasheet for the part 74hc4050pw, it says it can be used to convert high voltage logic to low voltage logic. The datasheet also makes mention of being able to handle an input logic of no more than 15v while the device is powered from low voltage supply. Here is the circuit I made with the connections, however anytime I apply the input logic of 12v, I do not get any output at all. Could I be doing something wrong
Is the 12V ground connected to the IC GND?
Yes, all signal/power grounds are tied together.
How are you measuring the 3.3V output?
Do you have the IC soldered to a PCB?
Yes the IC is soldered on a pcb and I am using a multimeter to measure the desired output voltage.
Either the IC is bad or 6Y is shorted to ground or there is a bad solder connection.
Is there anything connected to 6Y?
Have you tried other outputs?
I have double checked the soldering and there are no solder bridges and the same phenomon is happening on the other lines as well. I suppose the next thing to do is to replace the IC and try again.
What do you have connected to the outputs?
That part cannot source a lot of current.
The output is connected to an esp32-s3 board
Should be OK
Does sound like a bad IC then
just out of curiosity, what happens when you ground 6A?
A series resistor, between the 'higher voltage' signal and the 4050 input, seems a good idea.
I've used the 4049 and 4050 all these years never knowing they are meant for this.
The inputs can tolerate 15 volts:
The 74HC4050 is a hex buffer with over-voltage tolerant inputs. Inputs are overvoltage tolerant to 15 V which enables the device to be used in HIGH-to-LOW level shifting applications
a7
A little update, the chips work when I tried a new one isolated from the board. It appears the issue was from my custom board. Thanks everyone for the help.
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