The MC74AC139/74ACT139 is a high-speed, dual 1-of-4 decoder/demultiplexer.
The MC74AC139/DMC74AC139 and MC74ACT139 are high-speed, dual 1-of-4 decoder/demultiplexer devices. Each device contains two independent decoders, each accepting two binary-weighted inputs and providing four mutually exclusive active-LOW outputs. The enable input can also function as a data input for a 4-output demultiplexer application.
The document provides comprehensive technical specifications, including maximum ratings, recommended operating conditions, DC and AC characteristics, capacitance values, and package dimensions for various package types such as PDIP-16, SO-16, and TSSOP-16.
| Supply Voltage (ACT) | 4.5 to 5.5 V |
|---|---|
| Output Sink/Source Current | 24 mA |
| Operating Ambient Temperature | -40 to +85 °C |
| Input Capacitance | 4.5 pF |
When the Enable input is HIGH, all outputs are forced HIGH. It can also be used as a data input for a 4-output demultiplexer.
The device has two completely independent 1-of-4 decoders.