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Encyclopedia Entry: 74ACT251MTC
Product Overview
Category
The 74ACT251MTC belongs to the category of integrated circuits (ICs).
Use
This IC is commonly used in digital electronic systems for data multiplexing applications.
Characteristics
- The 74ACT251MTC is a quad 2-input multiplexer with three-state outputs.
- It operates on a supply voltage range of 4.5V to 5.5V.
- This IC offers high-speed performance and low power consumption.
- It is designed to be compatible with TTL (Transistor-Transistor Logic) inputs.
Package
The 74ACT251MTC is available in a small outline surface mount package (TSSOP-16).
Essence
The essence of the 74ACT251MTC lies in its ability to select one of four input data sources and route it to a single output line.
Packaging/Quantity
This IC is typically sold in reels or tubes, containing a quantity of 250 units per package.
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: 5ns (max)
- Output Current: ±24mA
Detailed Pin Configuration
The 74ACT251MTC has a total of 16 pins arranged as follows:
+---+--+---+
S1A |1 +--+ 16| VCC
S1B |2 15| S3
S2A |3 14| S2
S2B |4 13| GND
Y1 |5 12| Y4
Y2 |6 11| S0
GND |7 10| S1
Y3 |8 9| OE
+----------+
Functional Features
- Quad 2-input multiplexer: Allows selection of one out of four input data sources.
- Three-state outputs: Provides high impedance state when the output is not enabled.
- TTL compatibility: Designed to work with TTL logic levels, ensuring easy integration into existing systems.
Advantages and Disadvantages
Advantages
- High-speed performance: Enables efficient data multiplexing in time-critical applications.
- Low power consumption: Helps conserve energy and extend battery life in portable devices.
- Small package size: Facilitates space-saving integration in compact electronic systems.
Disadvantages
- Limited input/output options: Only supports four input data sources and a single output line.
- Temperature limitations: Operating temperature range may restrict usage in extreme environments.
Working Principles
The 74ACT251MTC operates by using its control inputs (S0, S1, S2, S3) to select one of the four input data sources (S1A/S1B, S2A/S2B) and route it to the output pins (Y1, Y2, Y3, Y4). The output can be enabled or disabled using the OE (Output Enable) pin. When the OE pin is low, the outputs are active; otherwise, they enter a high impedance state.
Detailed Application Field Plans
The 74ACT251MTC finds application in various digital systems, including but not limited to: - Data communication equipment - Industrial automation systems - Consumer electronics - Automotive electronics - Medical devices
Detailed and Complete Alternative Models
Some alternative models that offer similar functionality to the 74ACT251MTC include: - 74HC251: A high-speed CMOS version of the multiplexer. - CD4051B: An analog multiplexer/demultiplexer IC with similar pin configuration. - SN54/74LS151: A TTL logic multiplexer with eight input options.
These alternative models can be considered based on specific project requirements and compatibility with existing systems.
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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng 74ACT251MTC trong giải pháp kỹ thuật
Sure! Here are 10 common questions and answers related to the application of 74ACT251MTC in technical solutions:
Q: What is the 74ACT251MTC? A: The 74ACT251MTC is a multiplexer IC (Integrated Circuit) that allows multiple input signals to be selected and routed to a single output.
Q: What is the maximum operating voltage for the 74ACT251MTC? A: The maximum operating voltage for the 74ACT251MTC is typically 5.5V.
Q: How many inputs does the 74ACT251MTC have? A: The 74ACT251MTC has 8 inputs, labeled A0 to A7.
Q: Can the 74ACT251MTC handle analog signals? A: No, the 74ACT251MTC is designed to handle digital signals only.
Q: What is the purpose of the select lines (S0, S1, S2) on the 74ACT251MTC? A: The select lines are used to control which input signal is routed to the output. By setting the select lines to a specific binary value, one of the inputs can be selected.
Q: What is the output format of the 74ACT251MTC? A: The output of the 74ACT251MTC is a single digital signal.
Q: Can the 74ACT251MTC be cascaded to increase the number of inputs? A: Yes, multiple 74ACT251MTC ICs can be cascaded together to increase the number of inputs and select lines.
Q: What is the typical propagation delay of the 74ACT251MTC? A: The typical propagation delay of the 74ACT251MTC is around 5 nanoseconds.
Q: Can the 74ACT251MTC be used in high-speed applications? A: Yes, the 74ACT251MTC is designed for high-speed operation and can be used in applications that require fast switching times.
Q: What are some common applications of the 74ACT251MTC? A: The 74ACT251MTC is commonly used in digital systems for data routing, signal selection, multiplexing, and demultiplexing tasks.
Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.