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SN74AC245NG4
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SN74AC245NG4

Product Overview

  • Category: Integrated Circuit
  • Use: Level Shifter/Transceiver
  • Characteristics: High-Speed, Non-Inverting, 8-Bit, Bidirectional
  • Package: PDIP (Plastic Dual In-Line Package)
  • Essence: Transfers data between two bidirectional buses with different voltage levels
  • Packaging/Quantity: Tube/40 pieces per tube

Specifications

  • Supply Voltage: 2V to 6V
  • Input Voltage Levels: 0V to VCC
  • Output Voltage Levels: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay: 5.8ns (typical)
  • Output Drive Capability: ±24mA

Detailed Pin Configuration

The SN74AC245NG4 has a total of 20 pins arranged 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. GND (Ground)
  12. B5 (Data Input/Output)
  13. A5 (Data Input/Output)
  14. B6 (Data Input/Output)
  15. A6 (Data Input/Output)
  16. B7 (Data Input/Output)
  17. A7 (Data Input/Output)
  18. B8 (Data Input/Output)
  19. A8 (Data Input/Output)
  20. VCC (Supply Voltage)

Functional Features

  • Bidirectional data transfer between two buses with different voltage levels
  • Non-inverting logic level translation
  • High-speed operation
  • Output drive capability for driving external loads
  • Direction control input for controlling data flow direction
  • Output enable input for enabling/disabling the outputs

Advantages and Disadvantages

Advantages

  • Allows interfacing between systems operating at different voltage levels
  • Provides non-inverting logic level translation
  • Supports high-speed data transfer
  • Can drive external loads with its output drive capability

Disadvantages

  • Limited to 8-bit bidirectional data transfer
  • Requires additional control signals for direction and output enable

Working Principles

The SN74AC245NG4 is a bidirectional level shifter/transceiver that allows data transfer between two buses operating at different voltage levels. It uses non-inverting logic level translation, ensuring that the data remains unchanged during the transfer.

The direction of data flow is controlled by the DIR pin, which determines whether the data is transferred from A to B or from B to A. The OE pin enables or disables the outputs, allowing the device to be put in a high-impedance state when not in use.

Detailed Application Field Plans

The SN74AC245NG4 is commonly used in various applications where data needs to be transferred between systems operating at different voltage levels. Some specific application fields include:

  1. Microcontroller interfacing with peripheral devices
  2. Communication interfaces between different modules or boards
  3. Level shifting in mixed-voltage systems
  4. Data transfer between FPGA and external devices
  5. Bus communication in industrial automation systems

Detailed and Complete Alternative Models

  1. SN74LVC245A: Low-Voltage CMOS Octal Bus Transceiver
  2. SN74HC245: High-Speed CMOS Octal Bus Transceiver
  3. SN74LVCH245A: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
  4. SN74ACT245: Octal Bus Transceiver with 3-State Outputs

These alternative models provide similar functionality and can be used as replacements for the SN74AC245NG4 in various applications.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av SN74AC245NG4 i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of SN74AC245NG4 in technical solutions:

  1. Q: What is SN74AC245NG4? A: SN74AC245NG4 is a type of octal bus transceiver integrated circuit (IC) that can be used for bidirectional level shifting and voltage translation.

  2. Q: What is the purpose of using SN74AC245NG4 in a technical solution? A: SN74AC245NG4 is commonly used to enable communication between devices operating at different voltage levels, ensuring compatibility and reliable data transfer.

  3. Q: What is the maximum voltage level that SN74AC245NG4 can handle? A: SN74AC245NG4 can handle a maximum voltage level of 5.5 volts.

  4. Q: Can SN74AC245NG4 be used for both uni-directional and bi-directional data transfer? A: Yes, SN74AC245NG4 supports both uni-directional and bi-directional data transfer, making it versatile for various applications.

  5. Q: How many channels does SN74AC245NG4 have? A: SN74AC245NG4 has 8 bidirectional channels, allowing for simultaneous data transfer in both directions.

  6. Q: What is the typical operating frequency range of SN74AC245NG4? A: The typical operating frequency range of SN74AC245NG4 is from 0Hz to 100MHz.

  7. Q: Can SN74AC245NG4 handle level shifting between different logic families? A: Yes, SN74AC245NG4 is designed to handle level shifting between different logic families, such as TTL and CMOS.

  8. Q: Does SN74AC245NG4 require external pull-up or pull-down resistors? A: No, SN74AC245NG4 has built-in internal pull-up and pull-down resistors, eliminating the need for external components in most cases.

  9. Q: What is the power supply voltage range for SN74AC245NG4? A: SN74AC245NG4 operates with a power supply voltage range of 2 volts to 5.5 volts.

  10. Q: Can SN74AC245NG4 be used in both digital and analog applications? A: SN74AC245NG4 is primarily designed for digital applications, but it can also be used in certain analog applications where voltage translation is required.

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