The MC74F258AN is a quad 2-input multiplexer with 3-state outputs. Four bits of data from two sources can be selected using a common Data Select input. The four outputs present the selected data in the complement (inverted) form. The outputs may be switched to a high impedance state with a HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems.
Multiplexer Expansion by Tying Outputs Together
Inverting 3-State Outputs
AC Enhanced Version of the F258
16 pin DIP. Manufactured by Motorola.