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74AC251MTC
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Encyclopedia Entry: 74AC251MTC

Product Overview

Category

The 74AC251MTC belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronic systems for data multiplexing applications.

Characteristics

  • The 74AC251MTC is a quad 2-input multiplexer with three-state outputs.
  • It operates on a supply voltage range of 2V to 6V.
  • This IC offers high-speed operation and low power consumption.
  • It is designed to be compatible with TTL (Transistor-Transistor Logic) inputs.

Package

The 74AC251MTC is available in a small outline surface mount package (TSSOP-16).

Essence

The essence of the 74AC251MTC lies in its ability to select one of four data inputs and route it to a single output line based on the control inputs.

Packaging/Quantity

This IC is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

  • Supply Voltage Range: 2V to 6V
  • Input Voltage High: 2V to VCC
  • Input Voltage Low: GND to 0.8V
  • Output Voltage High: 2.4V (min)
  • Output Voltage Low: 0.4V (max)
  • Propagation Delay Time: 5 ns (typical)
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74AC251MTC has a total of 16 pins arranged as follows:

+---+--+---+ A1 |1 +--+ 16| VCC B1 |2 15| Y S1 |3 14| B S0 |4 13| A B2 |5 12| GND A2 |6 11| C Y3 |7 10| D GND |8 9| Y2 +----------+

Functional Features

The key functional features of the 74AC251MTC include: - Quad 2-input multiplexer with three-state outputs. - Selects one of four data inputs based on control inputs. - High-speed operation and low power consumption. - TTL-compatible inputs for easy integration into digital electronic systems.

Advantages and Disadvantages

Advantages

  • High-speed operation allows for efficient data multiplexing.
  • Low power consumption helps in reducing overall system energy requirements.
  • Three-state outputs enable flexible connection to other components.

Disadvantages

  • Limited to a maximum supply voltage of 6V, which may restrict certain applications.
  • The small outline surface mount package (TSSOP-16) may require specialized equipment for soldering and handling.

Working Principles

The 74AC251MTC operates by utilizing the control inputs (S1 and S0) to select one of the four data inputs (A, B, C, or D) and route it to the output pin (Y). The selected input is determined by the binary combination applied to the control inputs. The three-state outputs allow the IC to be disconnected from the output line when not actively driving it.

Detailed Application Field Plans

The 74AC251MTC finds application in various digital electronic systems, including but not limited to: - Data multiplexing in microcontrollers and microprocessors. - Address decoding in memory systems. - Signal routing in communication devices. - Input selection in audio/video equipment.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74AC251MTC include: - 74HC251: High-speed CMOS logic quad 2-input multiplexer. - CD4053B: Analog multiplexer/demultiplexer with three-state outputs. - SN54/74LS157: TTL quad 2-line to 1-line data selectors/multiplexers.

These alternative models can be considered based on specific application requirements and compatibility with existing systems.

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Sebutkan 10 pertanyaan dan jawaban umum terkait penerapan 74AC251MTC dalam solusi teknis

Sure! Here are 10 common questions and answers related to the application of 74AC251MTC in technical solutions:

  1. Q: What is the 74AC251MTC? A: The 74AC251MTC is a multiplexer IC (Integrated Circuit) that allows multiple input signals to be selected and routed to a single output.

  2. Q: What is the operating voltage range for the 74AC251MTC? A: The 74AC251MTC operates within a voltage range of 2V to 6V.

  3. Q: How many inputs does the 74AC251MTC have? A: The 74AC251MTC has 8 inputs, labeled A0 to A7.

  4. Q: Can the 74AC251MTC handle analog signals? A: No, the 74AC251MTC is designed to work with digital signals only.

  5. Q: What is the purpose of the select inputs (S0 and S1) on the 74AC251MTC? A: The select inputs determine which input signal is routed to the output. By setting the appropriate combination of S0 and S1, you can select one of the 8 input signals.

  6. Q: What is the output configuration of the 74AC251MTC? A: The 74AC251MTC has a single output, labeled Y.

  7. Q: Can the 74AC251MTC be cascaded to increase the number of inputs? A: Yes, multiple 74AC251MTCs can be cascaded together to increase the number of inputs and select lines.

  8. Q: What is the maximum frequency at which the 74AC251MTC can operate? A: The 74AC251MTC can operate at a maximum frequency of 125 MHz.

  9. Q: Can the 74AC251MTC be used in both synchronous and asynchronous applications? A: Yes, the 74AC251MTC can be used in both synchronous and asynchronous applications.

  10. Q: What is the package type for the 74AC251MTC? A: The 74AC251MTC comes in a TSSOP (Thin Shrink Small Outline Package) package.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's specifications for the 74AC251MTC.