Logic Level Converter Circuit. A level shifter level translator in digital electronics also called logic level shifter or voltage level translation is a circuit used to translate signals from one logic level or voltage domain to another allowing compatibility between ics with different voltage requirements such as ttl and cmos. These circuits are capable of converting 5v to 3 3v and 3 3v to 5v successfully thus bridging the chip ttl and cmos chip families.
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 logic level converter presented here supports bidirectional level shifting by using one mosfet per bus line and it also protects the low voltage side from spikes at the high voltage side. There is basically one level shifting circuit on the board which is repeated four times to create four level shifting channels.
The logic level converter presented here supports bidirectional level shifting by using one mosfet per bus line and it also protects the low voltage side from spikes at the high voltage side.
There is basically one level shifting circuit on the board which is repeated four times to create four level shifting channels. 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 logic level converter presented here supports bidirectional level shifting by using one mosfet per bus line and it also protects the low voltage side from spikes at the high voltage side. When the high side changes the state from 1 to 0 or high to low 5v to 0v.
