Simple and practical bidirectional level translation circuit (3.3v-5v)

When you use3.3Vof the single-chip computer when,the level shift is inevitable.,will often encounter3.3Turn5Vor5VTurn3.3Vthe situation,here is an introduction to a simple circuit,He can switch between two levels.(attention is mutual oh,Two-way,not one-way.!).The circuit is very simple,only by3a resistor plus aMOSTube Composition,ElectricThe road map is as follows:

In, S1,S2for two signal terminals, Vcc_s1and theVcc_s2for the high-level voltages of the two signals.In addition, the restriction conditions are:
1,Vcc_s1<=vcc_s2.
2,S1The low level threshold is greater than0.7Varound(depending onNMOSwithin the diode voltage drop).
3,vgs<=vcc_s1.
4,Vds<=vcc_s2
for3.3Vand the5v/12vthe reciprocal conversion of the circuit, NMOSTube SelectionAP2306can be.The principle is relatively simple,Let 's analyze it on our own.!I have applied this circuit in many places,it works fine..

Simple and practical bidirectional level translation circuit (3.3v-5v)