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DM74ALS258M
Product Overview
- Category: Integrated Circuit (IC)
- Use: Digital Multiplexer
- Characteristics: High-speed, TTL compatible, 3-state outputs
- Package: 16-pin SOIC (Small Outline Integrated Circuit)
- Essence: The DM74ALS258M is a digital multiplexer IC that allows multiple input signals to be selected and routed to a single output line.
- Packaging/Quantity: Available in reels of 2500 units
Specifications
- Supply Voltage: 4.5V to 5.5V
- Input Voltage: 0V to VCC
- Output Voltage: 0V to VCC
- Operating Temperature: -40°C to +85°C
- Propagation Delay: 9ns (typical)
- Input Capacitance: 10pF (typical)
- Output Current: ±24mA
Pin Configuration
The DM74ALS258M has a total of 16 pins, which are assigned specific functions as follows:
- A0: Input A0
- A1: Input A1
- A2: Input A2
- A3: Input A3
- B: Input B
- C: Input C
- D: Input D
- GND: Ground
- Y: Output Y
- E: Enable Input
- VCC: Supply Voltage
- NC: No Connection
- NC: No Connection
- NC: No Connection
- NC: No Connection
- NC: No Connection
Functional Features
- 4-bit data selection using 2 control inputs (A0 and A1)
- 3-state outputs allow for easy bus sharing
- High-speed operation suitable for time-critical applications
- TTL compatible inputs ensure compatibility with a wide range of digital systems
Advantages and Disadvantages
Advantages
- High-speed operation enables efficient data selection in time-sensitive applications.
- 3-state outputs facilitate bus sharing, reducing the number of required output lines.
- TTL compatibility ensures easy integration with existing digital systems.
Disadvantages
- Limited to 4-bit data selection, may not be suitable for applications requiring larger data buses.
- Requires an external enable signal (E) for proper operation.
Working Principles
The DM74ALS258M is a digital multiplexer that uses control inputs (A0 and A1) to select one of four input lines (B, C, D) and route it to the output line (Y). The enable input (E) must be active for the multiplexer to function. When E is low, the output is in a high-impedance state.
Detailed Application Field Plans
The DM74ALS258M can be used in various applications where multiple input signals need to be selectively routed to a single output line. Some potential application fields include:
- Data communication systems
- Digital audio/video equipment
- Industrial automation
- Automotive electronics
- Medical devices
Detailed and Complete Alternative Models
- SN74ALS258N: Similar functionality, but available in a 16-pin DIP (Dual Inline Package) instead of SOIC.
- CD74ALS258E: Equivalent IC from a different manufacturer, offering similar specifications and pin configuration.
These alternative models can be considered based on specific requirements or availability.
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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng DM74ALS258M trong giải pháp kỹ thuật
Sure! Here are 10 common questions and answers related to the application of DM74ALS258M in technical solutions:
Q: What is DM74ALS258M? A: DM74ALS258M is a specific type of integrated circuit (IC) known as a multiplexer/demultiplexer. It can be used to select one of multiple input signals and route it to a single output.
Q: What are the typical applications of DM74ALS258M? A: DM74ALS258M is commonly used in digital systems where multiple data sources need to be selectively routed to a single destination, such as in data communication networks, memory systems, or control systems.
Q: How many inputs does DM74ALS258M have? A: DM74ALS258M has four data inputs (A, B, C, D) that can be selected using two select inputs (S0, S1).
Q: How many outputs does DM74ALS258M have? A: DM74ALS258M has one output (Y) that carries the selected input signal based on the select inputs.
Q: What is the operating voltage range for DM74ALS258M? A: The operating voltage range for DM74ALS258M is typically between 4.5V and 5.5V.
Q: Can DM74ALS258M handle analog signals? A: No, DM74ALS258M is designed to work with digital signals only. It cannot handle analog signals.
Q: What is the maximum frequency at which DM74ALS258M can operate? A: DM74ALS258M can typically operate at frequencies up to 25 MHz.
Q: Does DM74ALS258M have any built-in protection features? A: Yes, DM74ALS258M has built-in diode clamps on the inputs to protect against electrostatic discharge (ESD) and other voltage spikes.
Q: Can DM74ALS258M be cascaded to increase the number of inputs? A: Yes, multiple DM74ALS258M ICs can be cascaded together to increase the number of inputs and select lines.
Q: What is the package type for DM74ALS258M? A: DM74ALS258M is typically available in a 16-pin dual in-line package (DIP) or a surface mount package (SMD).
Please note that the answers provided here are general and may vary depending on the specific datasheet and manufacturer's specifications for DM74ALS258M.