74HC157 Logic Gate
KSh 140.00
In stock
The 74HC157 is a quad 2-to-1 multiplexer integrated circuit (IC) belonging to the 74HC logic family. Here’s a breakdown of its key features:
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Function: It acts as a multiplexer, which essentially allows you to select one of two data sources for each of its four outputs.
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Number of Channels: Quad – It contains four independent multiplexers within a single IC package.
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Input/Output Count:
- For each multiplexer:
- Two data inputs (Data source 0: I0 and Data source 1: I1)
- One select input (S) to choose between I0 or I1
- One output (Y) that provides the selected data
- One common Enable input (E) for all four multiplexers (might be active high or low depending on the specific variant)
- For each multiplexer:
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Logic Family: 74HC – Uses high-speed CMOS technology, offering good noise immunity and relatively low power consumption.
How it Works:
The 74HC157 allows you to route data from two sources (I0 and I1) to four outputs (Y) based on the Select input (S) for each multiplexer.
- When S is LOW, the data from I0 is routed to the corresponding Y output.
- When S is HIGH, the data from I1 is routed to the corresponding Y output.
The Enable input (E) can be used to control all four multiplexers simultaneously. Depending on the specific variant (check the datasheet), a high or low signal on E might enable or disable the outputs. When disabled (outputs in high-impedance state), regardless of the S input, no data is routed to the Y outputs.
Applications:
- Data selection: Choosing between different data sources based on a control signal (S).
- Signal multiplexing: Combining multiple data streams onto fewer output lines.
- Building logic circuits: Implementing more complex logic functions by combining multiple 74HC157s with other logic gates.
- Microcontroller interface expansion: Expanding the number of data inputs or outputs for a microcontroller by using multiple 74HC157s.
Resources:
You can find the datasheet for the 74HC157 online at various electronics component distributors or websites.
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