SN74AS258DR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics:
  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
  • Multiple input/output options
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: SN74AS258DR is a data selector/multiplexer IC that allows the selection of one out of four data inputs based on the control inputs.
• Packaging/Quantity: Available in reels or tubes, with varying quantities depending on the supplier.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Logic Family: AS (Advanced Schottky)
• Number of Inputs: 4
• Number of Outputs: 1
• Propagation Delay Time: 9ns (typical)
• Power Dissipation: 500mW (max)

Detailed Pin Configuration

The SN74AS258DR IC has a total of 16 pins, which are assigned specific functions as follows:

1. A1: Data Input 1
2. B1: Data Input 2
3. C1: Data Input 3
4. D1: Data Input 4
5. GND: Ground
6. Y: Multiplexed Output
7. E: Enable Input
8. B2: Data Input 2
9. C2: Data Input 3
10. D2: Data Input 4
11. A2: Data Input 1
12. VCC: Positive Power Supply
13. NC: No Connection
14. NC: No Connection
15. NC: No Connection
16. NC: No Connection

Functional Features

• Data Selection: The SN74AS258DR allows the selection of one out of four data inputs using the control inputs.
• Multiplexing: It can be used to multiplex multiple data sources into a single output.
• High-Speed Operation: The IC operates at high speeds, making it suitable for applications requiring quick data selection.
• Low Power Consumption: It consumes low power, making it energy-efficient.
• Wide Operating Voltage Range: The IC can operate within a wide voltage range, providing flexibility in various applications.

Advantages and Disadvantages

Advantages

• Fast operation speed
• Low power consumption
• Versatile input/output options
• Wide operating voltage range
• Compact SOIC package

Disadvantages

• Limited number of inputs and outputs (4:1 multiplexer)
• Not suitable for applications requiring more complex data selection or larger input/output configurations

Working Principles

The SN74AS258DR is based on the principles of digital logic circuits. It utilizes control inputs to select one of the four data inputs and routes it to the output pin. The enable input determines whether the IC is active or not. When enabled, the selected data input is passed through to the output pin. When disabled, the output remains in a high-impedance state.

Detailed Application Field Plans

The SN74AS258DR is commonly used in various applications, including:

1. Data Multiplexing: It can be used to combine multiple data sources into a single output, such as in communication systems or data acquisition systems.
2. Address Decoding: The IC can be employed in address decoding circuits to select specific memory locations or peripheral devices.
3. Data Routing: It enables the selection of different data inputs based on control signals, allowing flexible routing in digital systems.
4. Signal Switching: The IC can be utilized to switch between different signals in audio or video applications.

Detailed and Complete Alternative Models

• SN74AS257DR: 3-Line to 1-Line Data Selector/Multiplexer
• SN74AS256DR: Dual 4-Line to 1-Line Data Selector/Multiplexer
• SN74AS259DR: 8-Line to 1-Line Data Selector/Multiplexer

These alternative models provide different input/output configurations and are suitable for various application requirements.

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