National Semiconductor's 54AC253 and 54ACT253 are dual 4-input multiplexers with TRI-STATE outputs. According to the datasheet, the devices select two bits of data from four sources using common select inputs, and each output can be switched to a high-impedance state by a HIGH on its Output Enable input.
The document gives pin names and connection diagrams for DIP, Flatpak and LCC packages, a truth table and logic equations, absolute maximum ratings, recommended operating conditions, DC and AC electrical characteristics, capacitance values, and physical dimensions for the E20A, J16A and W16A packages.
| Supply voltage (54AC) | 2.0 V to 6.0 V |
|---|---|
| Supply voltage (54ACT) | 4.5 V to 5.5 V |
| Output source/sink current | 24 mA |
| Operating temperature | -55°C to +125°C |
| Input capacitance | 4.5 pF |
| Power dissipation capacitance | 50.0 pF |
It is a dual 4-input multiplexer with TRI-STATE outputs that selects two bits of data from four sources using common select inputs.
Each multiplexer selects two bits of data from four sources using common Select inputs.
The corresponding output is forced to a high-impedance (High Z) state.