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MC74ACT138DTR2
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MC74ACT138DTR2

Product Overview

Category

MC74ACT138DTR2 belongs to the category of digital integrated circuits.

Use

This product is commonly used in digital electronics for decoding applications.

Characteristics

  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
  • Schmitt trigger inputs
  • Balanced propagation delays

Package

MC74ACT138DTR2 is available in a small outline package (SOT-353), which is suitable for surface mount applications.

Essence

The essence of MC74ACT138DTR2 lies in its ability to decode three binary inputs into eight mutually exclusive outputs.

Packaging/Quantity

This product is typically packaged in reels, with 3000 units per reel.

Specifications

  • Supply Voltage: 2.0V to 6.0V
  • Input Voltage: -0.5V to VCC + 0.5V
  • Output Voltage: -0.5V to VCC + 0.5V
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Propagation Delay: 7 ns

Detailed Pin Configuration

MC74ACT138DTR2 has a total of 16 pins, each serving a specific function:

  1. GND: Ground pin
  2. A0: Binary input A0
  3. A1: Binary input A1
  4. A2: Binary input A2
  5. Y0: Output Y0
  6. Y1: Output Y1
  7. Y2: Output Y2
  8. Y3: Output Y3
  9. Y4: Output Y4
  10. Y5: Output Y5
  11. Y6: Output Y6
  12. Y7: Output Y7
  13. E1: Enable input 1
  14. E2: Enable input 2
  15. VCC: Positive power supply pin
  16. GND: Ground pin

Functional Features

MC74ACT138DTR2 offers the following functional features:

  • Decodes three binary inputs into eight mutually exclusive outputs
  • Enables easy selection of desired output based on input combination
  • Provides balanced propagation delays for accurate decoding operations
  • Incorporates Schmitt trigger inputs for noise immunity

Advantages and Disadvantages

Advantages

  • High-speed operation allows for efficient decoding in time-critical applications
  • Low power consumption makes it suitable for battery-powered devices
  • Wide operating voltage range ensures compatibility with various systems
  • Schmitt trigger inputs enhance noise immunity, improving overall reliability
  • Balanced propagation delays enable precise decoding operations

Disadvantages

  • Limited to decoding three binary inputs, which may not be sufficient for complex applications requiring more inputs
  • Availability in surface mount package may limit usage in certain applications that require through-hole mounting

Working Principles

MC74ACT138DTR2 operates based on the principle of combinational logic. It decodes the three binary inputs (A0, A1, A2) and activates the corresponding output line (Y0-Y7) based on the input combination. The enable inputs (E1, E2) control the activation of the decoder, allowing for selective decoding when required.

Detailed Application Field Plans

MC74ACT138DTR2 finds application in various fields, including but not limited to:

  1. Address decoding in microcontrollers and microprocessors
  2. Memory selection in digital storage systems
  3. Multiplexing and demultiplexing operations in data communication systems
  4. Control signal generation in industrial automation systems
  5. Logic circuit design in educational projects

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to MC74ACT138DTR2 include:

  1. 74HC138: High-speed CMOS logic decoder with similar pin configuration and functionality.
  2. CD74ACT138E: Advanced CMOS logic decoder with enhanced noise immunity and wider operating temperature range.
  3. SN74LS138N: TTL logic decoder with comparable performance characteristics.

These alternative models can be considered based on specific requirements and availability in the market.

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Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi MC74ACT138DTR2 dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of MC74ACT138DTR2 in technical solutions:

  1. Q: What is MC74ACT138DTR2? A: MC74ACT138DTR2 is a 3-to-8 decoder/demultiplexer integrated circuit (IC) that can be used in various digital logic applications.

  2. Q: What is the operating voltage range for MC74ACT138DTR2? A: The operating voltage range for MC74ACT138DTR2 is typically between 4.5V and 5.5V.

  3. Q: How many outputs does MC74ACT138DTR2 have? A: MC74ACT138DTR2 has 8 outputs, corresponding to the 8 possible combinations of its 3 input lines.

  4. Q: Can MC74ACT138DTR2 be used as a demultiplexer? A: Yes, MC74ACT138DTR2 can be used as a demultiplexer by connecting its input lines to the desired control signals and using its outputs to select different data paths.

  5. Q: What is the maximum output current of MC74ACT138DTR2? A: The maximum output current of MC74ACT138DTR2 is typically 24mA.

  6. Q: Can MC74ACT138DTR2 be cascaded to create larger decoders? A: Yes, multiple MC74ACT138DTR2 ICs can be cascaded together to create larger decoders with more input lines and output options.

  7. Q: What is the propagation delay of MC74ACT138DTR2? A: The propagation delay of MC74ACT138DTR2 is typically around 9ns.

  8. Q: Can MC74ACT138DTR2 be used in high-speed applications? A: Yes, MC74ACT138DTR2 is designed for high-speed operation and can be used in applications that require fast switching times.

  9. Q: What is the power supply voltage required for MC74ACT138DTR2? A: MC74ACT138DTR2 requires a single power supply voltage of 5V.

  10. Q: Can MC74ACT138DTR2 be used in both commercial and industrial applications? A: Yes, MC74ACT138DTR2 is suitable for use in both commercial and industrial applications due to its wide operating temperature range and robust design.

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