
Allicdata Part #: | DM74LS158N-ND |
Manufacturer Part#: |
DM74LS158N |
Price: | $ 0.00 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | ON Semiconductor |
Short Description: | IC SELECTOR/MUX QUAD 2-1 16DIP |
More Detail: | Multiplexer 4 x 2:1 16-PDIP |
DataSheet: | ![]() |
Quantity: | 1000 |
Series: | 74LS |
Packaging: | Tube |
Part Status: | Obsolete |
Type: | Multiplexer |
Circuit: | 4 x 2:1 |
Independent Circuits: | 1 |
Current - Output High, Low: | 400µA, 8mA |
Voltage Supply Source: | Single Supply |
Voltage - Supply: | 4.75 V ~ 5.25 V |
Operating Temperature: | 0°C ~ 70°C |
Mounting Type: | Through Hole |
Package / Case: | 16-DIP (0.300", 7.62mm) |
Supplier Device Package: | 16-PDIP |
Base Part Number: | 74LS158 |
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Logic - Signal Switches, Multiplexers, Decoders
DM74LS158N is an integrated circuit (IC) made up of a multiplexer, a demultiplexer and a decoder. It belongs to the 74LS (Low Power Schottky) family of logic devices. The DM74LS158N is a low power, high-speed Quad 2-to-1 Multiplexer/Demultiplexer plus a Single 4-to-1 Multiplexer/Demultiplexer integrated circuit. In this article we discuss DM74LS158N application field and working principle.
Applications of DM74LS158N
The DM74LS158N has many applications in different areas such as communication, television, audio, video, sound and vision systems, automotive, computers and peripherals, consumer items, and other industrial applications. It is applied as an address decoder, gaining address selection and data bus expansion, using a small number of input/output lines.
- Television and Video
- Automatic Video Gain Control
- Composite Video Buffer
- Color Decoder
- Matrix Switches
- Communication
- Address Decoding
- Data Expansion
- Pulse Code Modulation
- Signal Frequency Conversion
- Sound and Vision Systems
- Tone/Level Control Circuits
- Low Frequency Separator
- Industrial
- Timers
- Welding Controls
- System Control Elements
Working Principle of DM74LS158N
The DM74LS158N comprises of a multiplexer, a demultiplexer and a decoder. The multiplexer can be thought of as a switch that can select one of two inputs and routed it to the output. The demultiplexer has two inputs: an input ‘address’, and a data input. The input ‘address’ is used to choose which of the two outputs to send the data to. The fourth circuit on the DM74LS158N is a 4-to-1 multiplexer/demultiplexer. This circuit also has two inputs and two outputs. The two inputs are used for selecting one of two outputs, and the two outputs are used for selecting one of four inputs.
The four input lines of the quad multiplexer are labeled A,, B,, C,, and D,. The two input lines of the single multiplexer are labeled A, and B,. The four output lines of the quad multiplexer are labeled Y,, Y,, Y,, and Y,. Similarly, the two outputs of the single multiplexer are labeled Y, and Y,. The input selection signal of the DM74LS158N is labeled ‘Address’. This signal is entered into the multiplexer and demultiplexer and is used to control the switching of the multiplexer and demultiplexer.
When the ‘Address’ signal is high, the multiplexer will select the input with the highest signal level. In this case, the input with the highest signal level is ‘D’. When the ‘Address’ signal is low, the multiplexer will select the input with the lower signal level. In this case, the input with the lower signal level is ‘C’. The multiplexer will then route either the ‘D’ or the ‘C’ signal to the output labeled ‘Y’.
The 4-to-1 multiplexer/demultiplexer works similarly. When the ‘Address’ signal is high, the multiplexer/demultiplexer will select the input with the highest signal level. In this case, the input with the highest signal level is ‘B’. When the ‘Address’ signal is low, the multiplexer/demultiplexer will select the input with the lower signal level. In this case, the input with the lower signal level is ‘A’. The multiplexer/demultiplexer will then route either the ‘B’ or the ‘A’ signal to the output labeled ‘Y,’.
The DM74LS158N is an effective solution for expanding the number of data lines available on a system. By using the combination of a multiplexer, a demultiplexer and a decoder, the DM74LS158N can switch, select and interpret signals, using only a small number of input/output lines.
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