Encyclopedia Entry: 74AC11257N

Product Overview

Category

The 74AC11257N 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 74AC11257N is a quad 2-input multiplexer with three-state outputs.
• It operates on a supply voltage range of 2V to 6V.
• This IC has a high-speed operation, making it suitable for applications requiring fast data switching.
• It offers low power consumption, making it energy-efficient.
• The 74AC11257N is designed to be compatible with both TTL and CMOS logic levels.

Package and Quantity

The 74AC11257N is available in a standard 16-pin DIP (Dual In-line Package) format. Each package contains one IC.

Essence

The essence of the 74AC11257N lies in its ability to efficiently multiplex and demultiplex data signals in digital systems.

Specifications

• Supply Voltage Range: 2V to 6V
• Logic Family: AC
• Number of Inputs: 8 (4 multiplexer inputs and 4 select inputs)
• Number of Outputs: 4
• Output Type: Three-state
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 5 ns (typical)

Detailed Pin Configuration

The 74AC11257N has a total of 16 pins. Here is the detailed pin configuration:

1. A0: Multiplexer Input A0
2. B0: Multiplexer Input B0
3. Y0: Multiplexer Output Y0
4. GND: Ground
5. A1: Multiplexer Input A1
6. B1: Multiplexer Input B1
7. Y1: Multiplexer Output Y1
8. VCC: Supply Voltage
9. A2: Multiplexer Input A2
10. B2: Multiplexer Input B2
11. Y2: Multiplexer Output Y2
12. S0: Select Input S0
13. S1: Select Input S1
14. Y3: Multiplexer Output Y3
15. OE: Output Enable
16. NC: No Connection

Functional Features

• The 74AC11257N can select one of the four multiplexer inputs based on the select inputs (S0 and S1).
• It provides four three-state outputs (Y0 to Y3) that can be enabled or disabled using the output enable input (OE).
• This IC offers a wide operating voltage range, allowing it to be used in various digital systems.
• It has a high-speed operation, enabling efficient data switching.

Advantages and Disadvantages

Advantages

• High-speed operation for fast data switching.
• Low power consumption for energy efficiency.
• Compatibility with both TTL and CMOS logic levels.
• Wide operating voltage range for versatility.

Disadvantages

• Limited number of inputs and outputs.
• Requires careful handling due to its small size and delicate pins.

Working Principles

The 74AC11257N operates based on the principles of multiplexing and demultiplexing. It uses the select inputs (S0 and S1) to determine which of the four multiplexer inputs (A0 to A2, B0 to B2) is connected to the corresponding output (Y0 to Y3). The output enable input (OE) enables or disables the outputs. When enabled, the selected input is passed through to the corresponding output.

Detailed Application Field Plans

The 74AC11257N finds applications in various digital systems, including: - Data communication systems - Multiplexing and demultiplexing circuits - Data routing and switching systems - Digital signal processing - Microcontroller-based systems

Detailed Alternative Models

Here are some alternative models that can be used as substitutes for the 74AC11257N: - 74HC11257: Similar functionality but operates at a lower voltage range. - CD4051: Analog multiplexer/demultiplexer with similar pin configuration. - SN74LS157: Quad 2-line to 1-line data selectors/multiplexers.

In conclusion, the 74AC11257N is a versatile integrated circuit used for data multiplexing and demultiplexing applications. Its high-speed operation, low power consumption, and compatibility with different logic levels make it suitable for various digital systems. Careful handling and consideration of alternative models can enhance its effectiveness in specific applications.

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