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Encyclopedia Entry: 74ACT11257NSRE4
Product Information Overview
Category: Integrated Circuit (IC)
Use: The 74ACT11257NSRE4 is a quad 2-input multiplexer with non-inverting outputs. It is commonly used in digital electronic circuits for data routing and selection purposes.
Characteristics: - High-speed operation - Low power consumption - Wide operating voltage range - Non-inverting outputs - Schmitt-trigger inputs for noise immunity
Package: The 74ACT11257NSRE4 is available in a surface-mount package known as the "NS" package. This package type ensures easy integration onto printed circuit boards (PCBs) and allows for efficient use of space.
Essence: The essence of the 74ACT11257NSRE4 lies in its ability to select one of four input signals and route it to the output, based on the control inputs. This functionality makes it an essential component in various digital systems where data multiplexing is required.
Packaging/Quantity: The 74ACT11257NSRE4 is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier and customer requirements.
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: 6ns (typical)
- Output Current: ±24mA
Detailed Pin Configuration
The 74ACT11257NSRE4 has a total of 16 pins, each serving a specific function:
- A0: Input A0
- B0: Input B0
- Y0: Output Y0
- A1: Input A1
- B1: Input B1
- Y1: Output Y1
- GND: Ground
- Y2: Output Y2
- B2: Input B2
- A2: Input A2
- Y3: Output Y3
- B3: Input B3
- A3: Input A3
- VCC: Supply Voltage
- OE: Output Enable
- NC: No Connection
Functional Features
- Quad 2-input multiplexer with non-inverting outputs
- Selects one of four input signals based on control inputs
- High-speed operation allows for efficient data routing
- Schmitt-trigger inputs provide noise immunity
- Low power consumption ensures energy efficiency
Advantages and Disadvantages
Advantages: - High-speed operation enables quick data selection - Wide operating voltage range allows for compatibility with various systems - Non-inverting outputs simplify circuit design - Schmitt-trigger inputs enhance noise immunity, ensuring reliable performance
Disadvantages: - Limited to 2-input multiplexing functionality - Requires additional components for more complex data routing tasks
Working Principles
The 74ACT11257NSRE4 operates by utilizing its control inputs (A0, A1, A2, A3) to select one of the four input signals (B0, B1, B2, B3) and route it to the corresponding output (Y0, Y1, Y2, Y3). The output enable (OE) pin controls the activation of the outputs.
When the control inputs are set to a specific combination, the selected input signal is passed through to the corresponding output pin. The non-inverting nature of the outputs ensures that the selected signal remains unchanged in polarity.
Detailed Application Field Plans
The 74ACT11257NSRE4 finds applications in various digital systems, including but not limited to: - Data multiplexing in microprocessors and microcontrollers - Signal routing in communication systems - Address decoding in memory systems - Input selection in audio/video equipment - Control signal routing in industrial automation
Detailed and Complete Alternative Models
Some alternative models that offer similar functionality to the 74ACT11257NSRE4 include: - 74HC157: Quad 2-input multiplexer with non-inverting outputs - CD4052: Dual 4-channel analog multiplexer/demultiplexer - SN74LS151: 8-input data selector/multiplexer
These alternatives may have different specifications, pin configurations, or package types, but they serve similar purposes in digital circuitry.
Word Count: 550 words
Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng 74ACT11257NSRE4 trong giải pháp kỹ thuật
Sure! Here are 10 common questions and answers related to the application of 74ACT11257NSRE4 in technical solutions:
Q: What is the 74ACT11257NSRE4? A: The 74ACT11257NSRE4 is a quad 2-input multiplexer with 3-state outputs, commonly used in digital logic circuits.
Q: What are the key features of the 74ACT11257NSRE4? A: The key features include low power consumption, high-speed operation, wide operating voltage range, and 3-state outputs for bus-oriented applications.
Q: How many inputs does the 74ACT11257NSRE4 have? A: The 74ACT11257NSRE4 has four inputs, allowing you to select one of the four input signals to be routed to the output.
Q: What is the purpose of the 3-state outputs in this multiplexer? A: The 3-state outputs allow multiple devices to share a common bus without interfering with each other, as they can be disabled or enabled as needed.
Q: What is the maximum operating voltage for the 74ACT11257NSRE4? A: The 74ACT11257NSRE4 can operate within a voltage range of 2V to 6V.
Q: Can I use the 74ACT11257NSRE4 in both CMOS and TTL logic systems? A: Yes, the 74ACT11257NSRE4 is compatible with both CMOS and TTL logic levels, making it versatile for various applications.
Q: What is the propagation delay of the 74ACT11257NSRE4? A: The typical propagation delay of the 74ACT11257NSRE4 is around 5 ns, making it suitable for high-speed applications.
Q: Can I cascade multiple 74ACT11257NSRE4 devices together? A: Yes, you can cascade multiple 74ACT11257NSRE4 devices to increase the number of inputs and create larger multiplexers.
Q: Does the 74ACT11257NSRE4 have any built-in protection features? A: Yes, the 74ACT11257NSRE4 has built-in ESD protection, which helps safeguard the device against electrostatic discharge.
Q: What are some common applications of the 74ACT11257NSRE4? A: The 74ACT11257NSRE4 is commonly used in data routing, signal selection, bus switching, and general-purpose multiplexing applications.
Please note that these answers are general and may vary depending on specific use cases and datasheet specifications.