Abstract: An integrated circuit which is switchable between a line driver function and a bidirectional transceiver function is provided. The integrated circuit comprises a first buffer, a second buffer and a logic control function. The first buffer has a first input terminal, a first output terminal, and a first control terminal which receives a first control signal. The second buffer has a second input terminal coupled to the first output terminal, has a second output terminal coupled to the first input terminal and has a second control terminal which receives a second control signal. The logic control function generates the first and second control signals responsive to a selection signal, a direction signal and an output enable signal. As the selection signal is asserted the invention functions as a line driver, and as the selection signal is negated the invention functions as a bidirectional transceiver.