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74LVC138AD/AUJ

74LVC138AD/AUJ

Product Overview

  • Category: Integrated Circuit
  • Use: Decoding/Demultiplexing
  • Characteristics: Low voltage, high-speed CMOS device
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: 3-to-8 line decoder/demultiplexer
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage: 1.65V to 5.5V
  • High-Speed CMOS: tPD = 4.2 ns (typ) at 5V VCC
  • Low Power Dissipation: ICC = 4 µA (max) at 5V VCC
  • Output Drive Capability: 15 LSTTL Loads
  • Balanced Propagation Delays: tPLH = tPHL
  • Wide Operating Temperature Range: -40°C to +125°C
  • Input Clamp Diodes Limit High-Speed Termination Effects

Detailed Pin Configuration

  • Pin 1: Y0 (Output 0)
  • Pin 2: Y1 (Output 1)
  • Pin 3: GND (Ground)
  • Pin 4: A0 (Address Input 0)
  • Pin 5: A1 (Address Input 1)
  • Pin 6: E1 (Enable Input 1)
  • Pin 7: E2 (Enable Input 2)
  • Pin 8: VCC (Supply Voltage)
  • Pin 9: Y2 (Output 2)
  • Pin 10: Y3 (Output 3)
  • Pin 11: A2 (Address Input 2)
  • Pin 12: A3 (Address Input 3)
  • Pin 13: Y4 (Output 4)
  • Pin 14: Y5 (Output 5)
  • Pin 15: Y6 (Output 6)
  • Pin 16: Y7 (Output 7)

Functional Features

  • Decodes Three Binary Coded Inputs to Eight Outputs
  • Active LOW Enable Inputs for Easy Expansion
  • Ideal for Address Decoding in Microprocessor Systems
  • Can Drive Up to 15 LSTTL Loads

Advantages and Disadvantages

Advantages

  • Wide operating voltage range
  • Low power dissipation
  • Balanced propagation delays
  • Can drive multiple loads

Disadvantages

  • Limited output drive capability compared to some alternatives
  • Requires careful consideration of input signal levels

Working Principles

The 74LVC138AD/AUJ is a 3-to-8 line decoder/demultiplexer that decodes three binary address inputs (A0, A1, A2) into eight mutually exclusive outputs (Y0 to Y7). The device features active LOW enable inputs (E1, E2) which can be used to expand the decoder to larger systems.

Detailed Application Field Plans

The 74LVC138AD/AUJ is commonly used in microprocessor systems for address decoding, memory selection, and peripheral control. It is also utilized in various digital systems for data demultiplexing and signal routing.

Detailed and Complete Alternative Models

  • 74HC138: Similar functionality but operates at higher voltage levels
  • 74LS138: Operates at lower speed but with higher output drive capability
  • SN74LVC139A: Dual 2-to-4 line decoder/demultiplexer with similar characteristics

In conclusion, the 74LVC138AD/AUJ is a versatile and efficient decoder/demultiplexer suitable for a wide range of digital applications, offering a balance of performance, power consumption, and flexibility.

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技術ソリューションにおける 74LVC138AD/AUJ の適用に関連する 10 件の一般的な質問と回答をリストします。

  1. Question: What is the maximum operating voltage for 74LVC138AD/AUJ?
    Answer: The maximum operating voltage for 74LVC138AD/AUJ is 5.5V.

  2. Question: Can 74LVC138AD/AUJ be used in automotive applications?
    Answer: Yes, 74LVC138AD/AUJ is suitable for use in automotive applications.

  3. Question: What is the typical propagation delay of 74LVC138AD/AUJ?
    Answer: The typical propagation delay of 74LVC138AD/AUJ is 6 ns.

  4. Question: Is 74LVC138AD/AUJ compatible with 3.3V logic levels?
    Answer: Yes, 74LVC138AD/AUJ is compatible with 3.3V logic levels.

  5. Question: Does 74LVC138AD/AUJ have built-in ESD protection?
    Answer: Yes, 74LVC138AD/AUJ features built-in ESD protection.

  6. Question: What is the package type for 74LVC138AD/AUJ?
    Answer: 74LVC138AD/AUJ is available in a TSSOP-16 package.

  7. Question: Can 74LVC138AD/AUJ be used in battery-powered devices?
    Answer: Yes, 74LVC138AD/AUJ is suitable for use in battery-powered devices.

  8. Question: What is the input voltage range for 74LVC138AD/AUJ?
    Answer: The input voltage range for 74LVC138AD/AUJ is 0V to VCC.

  9. Question: Is 74LVC138AD/AUJ RoHS compliant?
    Answer: Yes, 74LVC138AD/AUJ is RoHS compliant.

  10. Question: Can 74LVC138AD/AUJ be used in industrial control systems?
    Answer: Yes, 74LVC138AD/AUJ is suitable for use in industrial control systems.