74HC541N (Octal Buffer/Line Driver 3-State)

From the shop's description

The 74HC541 are octal non-inverting buffer/line drivers with 3-state outputs. The 3-state outputs are controlled by the output enable inputs OE1 and OE2. A HIGH on OEn causes the outputs to assume a high impedance OFF-state. Applications Modem interface Voice/data telephone interface Lap-top computers UART interface 74HC541 datasheet