SN74LS243 Description
QUAD BUS TRANSCEIVER The SN54/ 74LS242 and SN54 / 74LS243 are Quad Bus Transmitters / Receivers designed for 4-line asynchronous 2-way data munications between data buses. The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. Not more than one output should be shorted at a time, nor for more than 1 second.