Encyclopedia Entry: 74ACT11257DWR

Product Overview

Category

The 74ACT11257DWR belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronic systems for data multiplexing and demultiplexing applications.

Characteristics

• The 74ACT11257DWR is a quad 2-input multiplexer/demultiplexer with three-state outputs.
• It operates on a wide voltage range, typically between 2V and 6V.
• This IC offers high-speed performance, making it suitable for applications requiring fast data switching.
• It has a low power consumption, making it energy-efficient.

Package

The 74ACT11257DWR is available in a standard 24-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of the 74ACT11257DWR lies in its ability to efficiently multiplex and demultiplex data signals in digital systems.

Packaging/Quantity

This IC is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

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
• Propagation Delay Time: 5ns (max)
• Output Current: ±24mA

Detailed Pin Configuration

The 74ACT11257DWR has a total of 24 pins. Here is the detailed pin configuration:

1. A0 (Input)
2. B0 (Input)
3. Y0 (Output)
4. GND (Ground)
5. A1 (Input)
6. B1 (Input)
7. Y1 (Output)
8. VCC (Power)
9. A2 (Input)
10. B2 (Input)
11. Y2 (Output)
12. OE (Output Enable)
13. A3 (Input)
14. B3 (Input)
15. Y3 (Output)
16. GND (Ground)
17. A4 (Input)
18. B4 (Input)
19. Y4 (Output)
20. VCC (Power)
21. A5 (Input)
22. B5 (Input)
23. Y5 (Output)
24. OE (Output Enable)

Functional Features

• The 74ACT11257DWR can function as a multiplexer, allowing multiple input signals to be selected and routed to a single output.
• It can also operate as a demultiplexer, enabling a single input signal to be distributed to multiple outputs.
• The IC incorporates three-state outputs, which provide the ability to disconnect the outputs from the bus, reducing power consumption and preventing conflicts in multi-device systems.

Advantages and Disadvantages

Advantages

• High-speed performance enables efficient data switching.
• Wide voltage range allows compatibility with various digital systems.
• Low power consumption contributes to energy efficiency.
• Three-state outputs prevent conflicts in multi-device systems.

Disadvantages

• Limited number of inputs and outputs may restrict its application in complex systems.
• Propagation delay time may affect real-time applications requiring instantaneous response.

Working Principles

The 74ACT11257DWR operates based on the principles of digital logic. It utilizes internal circuitry to select and route input signals to the desired output(s). The output enable (OE) pin controls the activation or deactivation of the outputs. When the OE pin is low, the outputs are enabled, allowing the selected input signal(s) to pass through. Conversely, when the OE pin is high, the outputs are disabled, effectively disconnecting them from the bus.

Detailed Application Field Plans

The 74ACT11257DWR finds applications in various digital systems, including but not limited to: - Data communication systems - Multiplexing and demultiplexing units - Microprocessor-based systems - Industrial automation equipment - Test and measurement instruments

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality to the 74ACT11257DWR: - 74HC11257: This IC operates on a wider voltage range (2V to 6V) and is available in different package options. - CD4051B: A multiplexer/demultiplexer IC with eight channels and three-state outputs. - SN74LS151: A 1-of-8 data selector/multiplexer with complementary outputs.

These alternative models can be considered based on specific requirements and system compatibility.

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