MM74C157N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: Quad 2-Input Multiplexer, TTL Logic Level
• Package: DIP (Dual In-line Package)
• Essence: The MM74C157N is a versatile multiplexer IC that allows the selection of one out of four data inputs based on the control inputs.
• Packaging/Quantity: Available in tubes or reels, with varying quantities depending on the supplier.

Specifications

• Supply Voltage: 4.75V to 5.25V
• Logic Family: TTL (Transistor-Transistor Logic)
• Number of Inputs: 4
• Number of Control Inputs: 2
• Output Current: ±8mA
• Propagation Delay: 15ns (typical)
• Operating Temperature Range: -55°C to +125°C

Detailed Pin Configuration

The MM74C157N has a total of 16 pins, which are assigned specific functions as follows:

1. A Input 1
2. B Input 1
3. Y Output 1
4. GND (Ground)
5. C Input 2
6. D Input 2
7. Y Output 2
8. VCC (Positive Power Supply)
9. Strobe (Control Input)
10. Enable (Control Input)
11. Y Output 3
12. D Input 3
13. C Input 3
14. B Input 3
15. A Input 3
16. Y Output 4

Functional Features

• The MM74C157N is designed to perform data selection/multiplexing operations.
• It can select one out of four data inputs and route it to the output based on the control inputs.
• The Strobe and Enable control inputs allow for flexible operation and data manipulation.

Advantages and Disadvantages

Advantages

• Versatile multiplexer IC suitable for various applications.
• Wide operating temperature range allows for use in extreme environments.
• TTL logic level compatibility ensures easy integration with other TTL-based systems.
• Low propagation delay enables fast data selection.

Disadvantages

• Limited number of inputs and control inputs may restrict certain complex applications.
• Requires external components for proper functioning, such as power supply and input/output devices.

Working Principles

The MM74C157N operates based on the principles of digital logic. It uses a combination of control inputs (Strobe and Enable) to select one of the four data inputs and route it to the output. The selected data input is determined by the binary value applied to the control inputs.

Detailed Application Field Plans

The MM74C157N can be used in various applications that require data selection or multiplexing. Some potential application fields include:

1. Data routing in communication systems.
2. Address decoding in memory systems.
3. Input selection in audio/video equipment.
4. Control signal routing in industrial automation.
5. Multiplexing of sensor inputs in measurement systems.

Detailed and Complete Alternative Models

• SN74LS157
• CD4052
• MC14052
• 74HC157
• CD74HC157

These alternative models offer similar functionality to the MM74C157N and can be used as replacements depending on specific requirements.

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