Bidirectional Level Shifter Circuit. Browse our wide range of direction controlled voltage translators auto bidirectional voltage translators and unidirectional voltage translators. This compact circuit makes it perfect for embedded systems that need to interface with different logic levels.
Simulation of bi directional logic level converter. As you can see in the below gif image during high level to low level logic conversion the logic input pin is shifted between 5v and 0v ground and the logic output is obtained as 3 3v and 0v. Basically how you use them is you connect your higher voltage normally 5v to the hv pin and then your lower voltage normally 3 3v to the lv pin and then any signal received on any of the pins will be output on the equivalently numbered pin on the other side at the appropriate voltage.
The figure depicts simple circuit to shift voltage from 3 3v to 5v and vice versa.
Often it becomes necessary to interface an existing or new 5v avr pic mcu project to new devices that use 3 3v logic like memory cards sim cards etc. The circuit can be used as bi directional voltage level converter. The circuits in the previous two sections are both only suitable for unidirectional logic lines but not in the case of a. Bi directional level shifters the bidirectional mosfet level shifter.
