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74LVQ245SJ
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74LVQ245SJ

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: Level Shifter and Bus Transceiver
  • Characteristics: High-speed, low-voltage, bidirectional data transfer
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: Logic level conversion and signal transmission
  • Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

  • Supply Voltage Range: 1.65V to 5.5V
  • Input Voltage Range: -0.5V to VCC + 0.5V
  • Output Voltage Range: -0.5V to VCC + 0.5V
  • Maximum Operating Frequency: 400 MHz
  • Number of Channels: 8
  • Input/Output Type: Tri-State

Detailed Pin Configuration

The 74LVQ245SJ has a total of 20 pins, which are arranged as follows:

  1. OE (Output Enable) - Pin 1
  2. A1 (Data Input/Output) - Pin 2
  3. B1 (Data Input/Output) - Pin 3
  4. A2 (Data Input/Output) - Pin 4
  5. B2 (Data Input/Output) - Pin 5
  6. A3 (Data Input/Output) - Pin 6
  7. B3 (Data Input/Output) - Pin 7
  8. A4 (Data Input/Output) - Pin 8
  9. B4 (Data Input/Output) - Pin 9
  10. GND (Ground) - Pin 10
  11. B5 (Data Input/Output) - Pin 11
  12. A5 (Data Input/Output) - Pin 12
  13. B6 (Data Input/Output) - Pin 13
  14. A6 (Data Input/Output) - Pin 14
  15. B7 (Data Input/Output) - Pin 15
  16. A7 (Data Input/Output) - Pin 16
  17. B8 (Data Input/Output) - Pin 17
  18. A8 (Data Input/Output) - Pin 18
  19. VCC (Supply Voltage) - Pin 19
  20. DIR (Direction Control) - Pin 20

Functional Features

  • Bidirectional data transfer between two voltage domains
  • Level shifting capability for interfacing different logic families
  • Tri-State outputs for bus sharing and isolation
  • High-speed operation up to 400 MHz
  • Low-voltage operation from 1.65V to 5.5V
  • ESD protection on all inputs and outputs

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems - High-speed operation enables efficient data transfer - Tri-State outputs provide flexibility in bus sharing applications - ESD protection ensures reliability in harsh environments

Disadvantages: - Limited number of channels (8) may not be sufficient for complex systems requiring more connections - SOIC package may not be suitable for space-constrained designs

Working Principles

The 74LVQ245SJ is a bidirectional level shifter and bus transceiver IC. It facilitates the conversion of logic levels between two voltage domains, allowing seamless communication between devices operating at different voltage levels. The direction of data flow is controlled by the DIR pin. When enabled, the IC transfers data from the A-side to the B-side or vice versa. When disabled, the outputs are in a high-impedance state, enabling multiple devices to share the same bus without interference.

Detailed Application Field Plans

The 74LVQ245SJ finds applications in various fields, including:

  1. Microcontroller interfacing with different voltage peripherals
  2. Communication systems requiring level shifting between logic families
  3. Industrial automation for bidirectional data transfer between sensors and controllers
  4. Automotive electronics for signal transmission between different subsystems
  5. Consumer electronics for connecting devices operating at different voltage levels

Detailed and Complete Alternative Models

  1. SN74LVC245A: Similar functionality with a wider supply voltage range (1.2V to 3.6V)
  2. MC74LVX245: Compatible alternative with TTL input/output levels
  3. CD74HCT245: High-speed CMOS alternative with TTL-compatible inputs

These alternative models offer similar features and can be used as replacements for the 74LVQ245SJ in specific applications.

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技術ソリューションにおける 74LVQ245SJ 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。

Sure! Here are 10 common questions and answers related to the application of 74LVQ245SJ in technical solutions:

  1. Question: What is the 74LVQ245SJ?
    Answer: The 74LVQ245SJ is a bidirectional octal bus transceiver with 3-state outputs, commonly used for level shifting and voltage translation in digital systems.

  2. Question: What is the operating voltage range of the 74LVQ245SJ?
    Answer: The 74LVQ245SJ operates within a voltage range of 1.65V to 5.5V.

  3. Question: Can the 74LVQ245SJ be used for level shifting between different voltage domains?
    Answer: Yes, the 74LVQ245SJ is commonly used for level shifting between different voltage domains, such as between 3.3V and 5V systems.

  4. Question: How many bidirectional channels does the 74LVQ245SJ have?
    Answer: The 74LVQ245SJ has 8 bidirectional channels, allowing for simultaneous data transfer in both directions.

  5. Question: What is the maximum data transfer rate supported by the 74LVQ245SJ?
    Answer: The 74LVQ245SJ can support data transfer rates up to 400 Mbps.

  6. Question: Does the 74LVQ245SJ have built-in protection against bus contention?
    Answer: Yes, the 74LVQ245SJ has built-in bus hold circuitry that prevents bus contention when the output enable (OE) input is high.

  7. Question: Can the 74LVQ245SJ be used in mixed-voltage systems?
    Answer: Yes, the 74LVQ245SJ can be used in mixed-voltage systems as long as the voltage levels are within its operating range.

  8. Question: What is the power supply voltage required for the 74LVQ245SJ?
    Answer: The 74LVQ245SJ requires a single power supply voltage, typically between 1.65V and 5.5V.

  9. Question: Can the 74LVQ245SJ be used in high-speed applications?
    Answer: Yes, the 74LVQ245SJ is designed for high-speed operation and can be used in applications that require fast data transfer.

  10. Question: Are there any specific layout considerations for using the 74LVQ245SJ?
    Answer: Yes, it is recommended to follow the manufacturer's guidelines for proper layout and decoupling to ensure optimal performance of the 74LVQ245SJ in your application.

Please note that these answers are general and may vary depending on the specific requirements and implementation of the 74LVQ245SJ in a technical solution.