The MC74AC258/74ACT258 is a quad 2-input multiplexer with 3-state outputs. It selects four bits of data from two sources under control of a common 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.
This document provides technical specifications for the MC74AC258 and MC74ACT258 devices, which are quad 2-input multiplexers featuring 3-state outputs. The chips allow four bits of data from two sources to be selected using a common data select input, presenting the selected data in an inverted form.
| Device Type | Quad 2-Input Multiplexer with 3-State Outputs |
|---|---|
| Output Current (Source/Sink) | 24 mA |
| Operating Temperature Range | -40°C to +85°C |
When the Select input is LOW, the I0x inputs are selected; when HIGH, the I1x inputs are selected.
The data on the selected inputs appears at the outputs in inverted form.