SN74F257D

Product Overview

Category

SN74F257D belongs to the category of integrated circuits (ICs).

Use

It is commonly used in digital logic applications for data multiplexing and demultiplexing.

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Compatibility with TTL logic levels

Package

SN74F257D is available in a 16-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of SN74F257D lies in its ability to efficiently handle data multiplexing and demultiplexing tasks in digital systems.

Packaging/Quantity

SN74F257D is typically sold in reels or tubes, with each reel or tube containing a specific quantity of ICs. The exact quantity may vary depending on the manufacturer.

Specifications

• Logic Family: SN74F
• Number of Inputs: 2
• Number of Outputs: 4
• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Propagation Delay Time: 6 ns (typical)
• Output Current: ±8 mA

Detailed Pin Configuration

1. A0 (Input A0)
2. A1 (Input A1)
3. E (Enable Input)
4. Y0 (Output Y0)
5. Y1 (Output Y1)
6. Y2 (Output Y2)
7. Y3 (Output Y3)
8. GND (Ground)
9. B0 (Input B0)
10. B1 (Input B1)
11. F (Output Enable Input)
12. Y4 (Output Y4)
13. Y5 (Output Y5)
14. Y6 (Output Y6)
15. Y7 (Output Y7)
16. VCC (Supply Voltage)

Functional Features

SN74F257D is a quad 2-input multiplexer with 3-state outputs. It allows the selection of one of four data inputs and routes it to the output based on the control inputs. The enable input (E) controls the operation of the multiplexer, while the output enable input (F) enables or disables the outputs.

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data handling.
• Low power consumption helps in reducing overall system power requirements.
• Wide operating voltage range provides flexibility in various applications.
• Compatibility with TTL logic levels ensures easy integration with existing systems.

Disadvantages

• Limited number of inputs and outputs may restrict its use in complex systems requiring more channels.
• Propagation delay time may affect real-time applications that demand faster response times.

Working Principles

SN74F257D operates by selectively connecting one of the four data inputs to the outputs based on the control inputs. When the enable input (E) is high, the selected input is routed to the corresponding output pins. The output enable input (F) determines whether the outputs are enabled or disabled.

Detailed Application Field Plans

SN74F257D finds applications in various digital systems, including but not limited to: - Data multiplexing/demultiplexing in communication systems - Address decoding in memory systems - Input/output expansion in microcontrollers - Signal routing in audio/video equipment

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to SN74F257D include: - CD74HC257E - MC74HC257N - 74ACT257SCX - SN74LS257N

These models offer similar functionality and can be used as drop-in replacements depending on specific requirements.

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