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SN74LS646DWRE4
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SN74LS646DWRE4

Product Overview

  • Category: Integrated Circuit
  • Use: Data Bus Transceiver
  • Characteristics: High-speed, TTL Logic Level, Bidirectional
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: Transfers data bidirectionally between two buses with different voltage levels
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 4.75V to 5.25V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Propagation Delay: 10ns
  • Maximum Output Current: ±24mA

Detailed Pin Configuration

  1. A1 - Bus A Data Input/Output
  2. B1 - Bus B Data Input/Output
  3. DIR - Direction Control Input
  4. OE - Output Enable Input
  5. GND - Ground
  6. B2 - Bus B Data Input/Output
  7. A2 - Bus A Data Input/Output
  8. VCC - Positive Power Supply

Functional Features

  • Bidirectional data transfer between two buses
  • TTL logic level compatibility
  • High-speed operation
  • Direction control input for selecting the active bus
  • Output enable input for enabling/disabling the outputs

Advantages

  • Allows interfacing between buses operating at different voltage levels
  • Supports high-speed data transmission
  • Provides bidirectional communication capability
  • Compact SOIC package for space-saving designs
  • Wide operating temperature range for versatile applications

Disadvantages

  • Requires external control signals for direction and output enable
  • Limited output current capacity
  • Not suitable for applications requiring very low propagation delay

Working Principles

The SN74LS646DWRE4 is a data bus transceiver that facilitates bidirectional communication between two buses with different voltage levels. It operates based on TTL logic levels and requires external control signals to determine the direction of data flow and enable/disable the outputs. The transceiver uses internal circuitry to ensure proper voltage level translation and data integrity during bidirectional data transfer.

Detailed Application Field Plans

  • Interfacing between microcontrollers and peripheral devices
  • Communication between different logic families (e.g., TTL and CMOS)
  • Data exchange between modules operating at different voltage levels
  • Bus communication in industrial automation systems
  • Networking equipment and telecommunications applications

Detailed and Complete Alternative Models

  1. SN74LS245N - Octal Bus Transceiver
  2. SN74LVC4245APWR - Octal Dual-Supply Bus Transceiver
  3. SN74LVTH162244DGGR - 16-Bit Buffer/Driver with 3-State Outputs
  4. SN74HCT245N - Octal Bus Transceiver with 3-State Outputs
  5. SN74CBT3257DGVRE4 - Quad FET Bus Switch

These alternative models offer similar functionality and can be used as substitutes for the SN74LS646DWRE4 depending on specific requirements and design constraints.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av SN74LS646DWRE4 i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of SN74LS646DWRE4 in technical solutions:

  1. Q: What is SN74LS646DWRE4? A: SN74LS646DWRE4 is a specific type of integrated circuit (IC) commonly used in digital systems for data bus interfacing.

  2. Q: What are the key features of SN74LS646DWRE4? A: Some key features of SN74LS646DWRE4 include an 8-bit bidirectional transceiver, 3-state outputs, and compatibility with TTL logic levels.

  3. Q: How can SN74LS646DWRE4 be used in technical solutions? A: SN74LS646DWRE4 can be used to enable bidirectional communication between different parts of a digital system, such as microprocessors, memory modules, or peripheral devices.

  4. Q: What is the maximum operating voltage for SN74LS646DWRE4? A: The maximum operating voltage for SN74LS646DWRE4 is typically around 5 volts.

  5. Q: Can SN74LS646DWRE4 handle high-speed data transfers? A: Yes, SN74LS646DWRE4 is designed to handle high-speed data transfers, making it suitable for applications that require fast communication between components.

  6. Q: Does SN74LS646DWRE4 support 3-state outputs? A: Yes, SN74LS646DWRE4 has 3-state outputs, which means it can effectively disconnect from the data bus when not actively transmitting or receiving data.

  7. Q: Is SN74LS646DWRE4 compatible with TTL logic levels? A: Yes, SN74LS646DWRE4 is compatible with TTL logic levels, making it easy to integrate into existing digital systems that use TTL-based components.

  8. Q: Can SN74LS646DWRE4 be used in both synchronous and asynchronous data transfer modes? A: Yes, SN74LS646DWRE4 can be used in both synchronous and asynchronous data transfer modes, providing flexibility in different system designs.

  9. Q: What is the typical power consumption of SN74LS646DWRE4? A: The typical power consumption of SN74LS646DWRE4 is relatively low, making it suitable for battery-powered or energy-efficient applications.

  10. Q: Are there any specific precautions to consider when using SN74LS646DWRE4? A: It is important to follow the manufacturer's datasheet and guidelines for proper usage, including considerations for voltage levels, signal integrity, and thermal management.

Please note that these answers are general and may vary depending on the specific application and requirements. Always refer to the manufacturer's documentation for accurate and detailed information.