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SN74AHC245DWE4
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SN74AHC245DWE4

Product Overview

Category

The SN74AHC245DWE4 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for level shifting and voltage translation applications.

Characteristics

  • High-speed CMOS technology
  • Wide voltage range: 2 V to 5.5 V
  • 8-bit bidirectional voltage-level translator
  • Non-inverting outputs
  • Low power consumption
  • Schmitt-trigger inputs for noise immunity
  • Available in surface mount package

Package

The SN74AHC245DWE4 is available in a 20-pin TSSOP (Thin Shrink Small Outline Package) package.

Essence

The essence of the SN74AHC245DWE4 is its ability to provide bidirectional voltage-level translation between different voltage domains.

Packaging/Quantity

The SN74AHC245DWE4 is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

  • Supply Voltage Range: 2 V to 5.5 V
  • Input Voltage Range: 0 V to VCC
  • Output Voltage Range: 0 V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay: 6 ns (max)
  • Output Drive Capability: ±24 mA

Detailed Pin Configuration

The SN74AHC245DWE4 has a total of 20 pins, which are assigned specific functions as follows:

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

Functional Features

The SN74AHC245DWE4 offers the following functional features:

  • Bidirectional voltage-level translation between two voltage domains
  • Non-inverting outputs for direct signal propagation
  • Schmitt-trigger inputs for improved noise immunity
  • High-speed operation with low power consumption
  • Wide supply voltage range for compatibility with various systems

Advantages and Disadvantages

Advantages

  • High-speed CMOS technology enables fast data transmission
  • Wide voltage range allows for versatile applications
  • Non-inverting outputs simplify signal routing
  • Schmitt-trigger inputs provide noise immunity

Disadvantages

  • Limited output drive capability may restrict use in high-current applications
  • TSSOP package may require careful handling during assembly

Working Principles

The SN74AHC245DWE4 operates by receiving input signals from one voltage domain and translating them to the corresponding voltage level of another domain. The direction control input (DIR) determines the direction of data flow, while the output enable input (OE) enables or disables the outputs. The IC uses CMOS technology to achieve high-speed operation and low power consumption.

Detailed Application Field Plans

The SN74AHC245DWE4 finds application in various fields, including:

  1. Microcontroller interfacing
  2. Level shifting in communication systems
  3. Data transmission between different voltage domains
  4. Logic level conversion in mixed-voltage systems
  5. Signal routing in industrial automation

Detailed and Complete Alternative Models

  1. SN74LVC245A: Low Voltage CMOS Octal Bus Transceiver
  2. SN74LVCH245A: Low Voltage CMOS Octal Bus Transceiver with 3-State Outputs
  3. SN74HCT245: High-Speed CMOS Octal Bus Transceiver

These alternative models offer similar functionality to the SN74AHC245DWE4 and can be considered as alternatives based on specific requirements.

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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng SN74AHC245DWE4 trong giải pháp kỹ thuật

Sure! Here are 10 common questions and answers related to the application of SN74AHC245DWE4 in technical solutions:

  1. Q: What is SN74AHC245DWE4? A: SN74AHC245DWE4 is a bidirectional octal bus transceiver with 3-state outputs, commonly used for level shifting and voltage translation in digital systems.

  2. Q: What is the operating voltage range of SN74AHC245DWE4? A: The operating voltage range is from 2 V to 5.5 V.

  3. Q: What is the maximum data transfer rate supported by SN74AHC245DWE4? A: SN74AHC245DWE4 can support data transfer rates up to 100 MHz.

  4. Q: Can SN74AHC245DWE4 be used for level shifting between different voltage domains? A: Yes, SN74AHC245DWE4 is commonly used for level shifting between different voltage domains, such as between 3.3V and 5V systems.

  5. Q: How many bidirectional channels does SN74AHC245DWE4 have? A: SN74AHC245DWE4 has 8 bidirectional channels, allowing for parallel data transfer.

  6. Q: Does SN74AHC245DWE4 have 3-state outputs? A: Yes, SN74AHC245DWE4 has 3-state outputs, which means it can effectively disconnect the output from the bus when not actively driving it.

  7. Q: What is the typical propagation delay of SN74AHC245DWE4? A: The typical propagation delay is around 6 ns.

  8. Q: Can SN74AHC245DWE4 be used for level shifting between different logic families? A: Yes, SN74AHC245DWE4 can be used for level shifting between different logic families, such as between CMOS and TTL.

  9. Q: What is the maximum output current that SN74AHC245DWE4 can drive? A: SN74AHC245DWE4 can drive up to 8 mA of output current per channel.

  10. Q: Is SN74AHC245DWE4 available in surface mount packages? A: Yes, SN74AHC245DWE4 is available in a surface mount package (SOIC-20) for easy integration into PCB designs.

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