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Description: 1. The 74139 is a dual decoder-demultiplexer integrated circuit (IC) that can be used for selecting one output from multiple inputs, or routing multiple input signals into separate outputs based on selection codes. 2. Components: It consists of two independent 74148 decoders and two independent 74147 demultiplexers. Each decoder has eight active-low inputs that can decode 3-to-8 line binary code into eight output lines. The demultiplexer routes the selected input to its corresponding output among eight possible outputs. 3. Uses: The 74139 is widely used in digital systems for routing, selecting, and multiplexing signals based on different select codes. It can be employed in applications like data selection, address decoding, memory addressing, and signal switching. 4. Select Codes: Each of the two decoders accepts a 3-bit binary code as input to determine the output selection. The decoded outputs are used as enable signals for corresponding demultiplexers. 5. Fan-Out Capability: E
| Specification | Details |
|---|---|
| Type | D-Type Decoder/Demultiplexer (4-to-1) |
| Number of Decoders | 2 |
| Input Data Rate | Up to 10 MHz |
| Power Supply | Single +5V |
| Operating Temperature | -55°C to +125°C |
| Package Type | DIP-16 |
| Pin Count | 16 |
| Functionality | Dual decoder with demultiplexing |
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