![]() ![]() The MOSFET’s gate terminal must be connected to a low voltage supply of 3.3 V. The bus on the right side is pulled HIGH at 5V and the device power is 5V. Pull the bus on the low voltage side to HIGH to 3.3 Volts and the device power is 3.3 Voltage supply on this side. Divide the circuit into two parts: the left, or low voltage side, and the right, or high voltage side.īoth sides have different supply voltages and logic levels. Consider the below circuit diagram consisting of a BSS138 N-channel MOSFET with an internal drain-substrate diode (one must be present). Now, let’s know the circuit diagram/how to use N-channel BSS138 logic level MOSFET as a bi-directional level shifter. Reverse transfer capacitance VDS=25V, VGS=0V, f=1MHz:6pF.Output capacitance VDS=25V, VGS=0V, f=1MHz:13pF.Input capacitance VDS=25V, VGS=0V, f=1MHz: 27pF. ![]()
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