Encyclopedia Entry: 74ACT157PC

Product Overview

Category

The 74ACT157PC belongs to the category of integrated circuits (ICs) and specifically falls under the family of multiplexers.

Use

This IC is primarily used for data selection and routing purposes in digital electronic systems. It allows multiple input signals to be selectively routed to a single output line, based on control inputs.

Characteristics

• High-speed operation: The 74ACT157PC is designed to operate at high clock frequencies, making it suitable for applications requiring fast data switching.
• Low power consumption: This IC is optimized for low power consumption, ensuring efficient operation in various electronic devices.
• Wide operating voltage range: It can operate within a wide voltage range, typically between 2V and 6V.
• Compatibility: The 74ACT157PC is compatible with both TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal-Oxide-Semiconductor) logic families.

Package

The 74ACT157PC is available in a standard 16-pin DIP (Dual In-line Package) format. This package provides easy integration into circuit boards and facilitates soldering.

Essence

The essence of the 74ACT157PC lies in its ability to perform data selection and routing functions efficiently and reliably. It simplifies complex digital systems by reducing the number of required components.

Packaging/Quantity

The 74ACT157PC is commonly packaged in tubes or reels, containing a quantity of 25 or 50 units per package.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to Vcc
• Output Voltage Range: 0V to Vcc
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 100 MHz
• Propagation Delay: 5 ns (typical)

Detailed Pin Configuration

The 74ACT157PC has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

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

Functional Features

The key functional features of the 74ACT157PC include: - Data selection: It allows for the selection of one out of four input lines to be routed to the output line. - Control inputs: The control inputs determine which input line is selected and routed to the output. - High-speed operation: The IC can handle high-frequency signals, enabling rapid data switching.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data routing in time-critical applications.
• Low power consumption ensures energy efficiency.
• Wide operating voltage range provides flexibility in various electronic systems.
• Compatibility with TTL and CMOS logic families allows for easy integration into existing designs.

Disadvantages

• Limited number of input lines (four) may restrict its use in complex systems requiring more inputs.
• Propagation delay of 5 ns may introduce slight latency in certain applications.

Working Principles

The 74ACT157PC operates based on the principle of multiplexing. It uses control inputs to select one of the four input lines and routes it to the output line. The selected input signal is then available at the output for further processing or transmission.

Detailed Application Field Plans

The 74ACT157PC finds applications in various fields, including: 1. Digital communication systems 2. Data multiplexing and routing in computer networks 3. Industrial automation and control systems 4. Consumer electronics, such as televisions and audio equipment 5. Automotive electronics, for signal routing and selection purposes

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74ACT157PC include: - 74HC157: This IC operates at a lower voltage range (2V to 6V) and is compatible with CMOS logic. - CD4051: A multiplexer IC with eight input lines and three control inputs, suitable for more complex data selection requirements. - SN74LS157: This IC operates at a lower clock frequency but offers compatibility with TTL logic.

In conclusion, the 74ACT157PC is a versatile multiplexer IC that provides efficient data selection and routing capabilities. Its high-speed operation, low power consumption, and wide operating voltage range make it suitable for various digital electronic applications.