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Explanation of Level Shifter

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Irina F

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For my temperature control circuit, the first part delivers a PWM signal at 5V, which then needs to be shifted to 12V in order to command a power driver and then a TEC. I am using therefore a CD40109B level shifter, but I am not really sure how to connect the pins. Of course, the following connections need to be made:
Vcc (pin 1)-> 5V
Vss (pin 8)-> GND
Vdd (pin 16)-> 12V
A (pin 3)-> PWM input signal

And now the question is: where to I collect the output signal shifted to 12V? On Enable A (pin 2) or E (pin 4)? And do I need to connect any other pins to 5V for instance?

Thank you in advance!
 

esp1

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hi,
Connect the Enable pin to +5V and use E for the 12V output.
See Table on page 3-395 of the datasheet.
E
 

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