The MPC104 consists of two identical monolithic, integrated, open-loop buffer amplifiers, which are connected internally at the output. The bipolar complementary buffers form a unidirectional transmission path and offer extremely high output-to-input isolation. The MPC104 multiplexer enables the user to connect one of two input signals to the output. The output of the multiplexer is in a high-impedance state when no channel is selected. When one channel is selected with a digital "1" at the corresponding SEL input, the component acts as a buffer with high input impedance and low output impedance.