SN74AS258D

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: DIP (Dual In-line Package)
Essence: Logic gate IC for data selection and multiplexing
Packaging/Quantity: Available in tubes of 25 or reels of 2,000 units

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
Propagation Delay Time: 9ns (typical)
Input Capacitance: 3pF (typical)
Output Current: ±8mA

Detailed Pin Configuration

The SN74AS258D has a total of 16 pins, which are assigned as follows:

A1 - Input A1
B1 - Input B1
C1 - Input C1
D1 - Input D1
GND - Ground
Y - Output Y
E - Enable Input
C2 - Input C2
D2 - Input D2
B2 - Input B2
A2 - Input A2
VCC - Positive Power Supply
Y - Output Y
E - Enable Input
F - Output Enable Input
GND - Ground

Functional Features

The SN74AS258D is a quad 2-input multiplexer with output enable. It allows the selection of one out of four data inputs based on the control inputs. The output enable input (E) enables or disables the outputs, while the select inputs (A1, A2, B1, B2) determine which data input is selected.

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick data selection - Low power consumption helps in reducing energy usage - Wide operating voltage range provides flexibility in various applications - Multiple input/output options offer versatility in circuit design

Disadvantages: - Limited to 2-input multiplexing, not suitable for more complex applications - Propagation delay time may affect real-time data processing in certain scenarios

Working Principles

The SN74AS258D operates based on the principles of digital logic gates. The select inputs control the transmission of data from one of the four inputs to the output. When the enable input is active, the selected input is passed through to the output. If the enable input is inactive, the output remains in a high-impedance state.

Detailed Application Field Plans

The SN74AS258D can be used in various applications, including but not limited to: - Data routing and selection in microcontrollers - Address decoding in memory systems - Multiplexing of control signals in digital circuits - Signal switching in communication systems

Detailed and Complete Alternative Models

Some alternative models that serve similar functions to the SN74AS258D include: - CD4051B: 8-channel analog multiplexer/demultiplexer IC - 74HC151: 8-input multiplexer IC - SN74LS157: Quad 2-line to 1-line data selector/multiplexer IC

These alternatives provide different features and specifications, allowing users to choose the most suitable option for their specific requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací SN74AS258D v technických řešeních

Sure! Here are 10 common questions and answers related to the application of SN74AS258D in technical solutions:

Q: What is SN74AS258D? A: SN74AS258D is a quad 2-input multiplexer with 3-state outputs, commonly used in digital logic circuits.
Q: What is the purpose of SN74AS258D? A: SN74AS258D is used to select one of four data inputs and route it to a single output based on the control inputs.
Q: What is the voltage range supported by SN74AS258D? A: SN74AS258D supports a voltage range of 4.5V to 5.5V.
Q: How many control inputs does SN74AS258D have? A: SN74AS258D has two control inputs, typically labeled as "A" and "B".
Q: How many data inputs can SN74AS258D handle? A: SN74AS258D can handle four data inputs, labeled as D0, D1, D2, and D3.
Q: Can SN74AS258D be cascaded to increase the number of inputs? A: Yes, multiple SN74AS258D chips can be cascaded together to increase the number of inputs and outputs.
Q: What is the output configuration of SN74AS258D? A: SN74AS258D has four 3-state outputs, labeled as Y0, Y1, Y2, and Y3.
Q: How does the control input affect the output selection? A: The control inputs (A and B) determine which data input is selected and routed to the corresponding output.
Q: What is the maximum operating frequency of SN74AS258D? A: The maximum operating frequency of SN74AS258D is typically around 25 MHz.
Q: Can SN74AS258D be used in both digital and analog applications? A: No, SN74AS258D is specifically designed for digital applications and should not be used in analog circuits.

Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.