Texas Instruments
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SN74AHC245PW
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SN74AHC245PW

Product Overview

  • Category: Integrated Circuit
  • Use: Level Shifter/Transceiver
  • Characteristics: High-Speed, Non-Inverting, 8-Bit Bidirectional Transceiver
  • Package: TSSOP (Thin Shrink Small Outline Package)
  • Essence: Logic Level Translator
  • Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

  • Supply Voltage Range: 2 V to 5.5 V
  • Input Voltage Range: 0 V to VCC
  • Output Voltage Range: 0 V to VCC
  • High-Level Input Voltage: 0.7 x VCC to VCC
  • Low-Level Input Voltage: 0 V to 0.3 x VCC
  • High-Level Output Voltage: 0.9 x VCC to VCC
  • Low-Level Output Voltage: 0 V to 0.1 x VCC
  • Maximum Operating Frequency: 80 MHz
  • Number of Pins: 20

Detailed Pin Configuration

The SN74AHC245PW has a total of 20 pins, which are numbered 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. GND (Ground)
  20. VCC (Supply Voltage)

Functional Features

  • Bidirectional Data Transfer: Allows data to be transmitted in both directions.
  • Non-Inverting Logic: Maintains the same logic level between input and output.
  • High-Speed Operation: Supports a maximum operating frequency of 80 MHz.
  • Level Shifting: Translates logic levels between different voltage domains.

Advantages and Disadvantages

Advantages: - Bi-directional communication simplifies circuit design. - Non-inverting logic preserves signal integrity. - High-speed operation enables fast data transfer. - Wide supply voltage range allows compatibility with various systems.

Disadvantages: - Limited number of data lines (8-bit) may not be sufficient for certain applications. - TSSOP package may require careful handling during assembly.

Working Principles

The SN74AHC245PW is a bidirectional level shifter/transceiver integrated circuit. It allows for the translation of logic levels between two different voltage domains. The direction of data flow is controlled by the DIR pin, while the OE pin enables or disables the outputs. The non-inverting nature of the device ensures that the logic level at the input is maintained at the output. The high-speed operation of the IC enables efficient data transfer between different systems.

Detailed Application Field Plans

The SN74AHC245PW finds applications in various fields, including:

  1. Microcontroller Interfacing: It can be used to interface microcontrollers operating at different voltage levels.
  2. Communication Systems: It facilitates level shifting in communication interfaces such as UART, SPI, and I2C.
  3. Sensor Networks: It enables data exchange between sensors operating at different voltage domains.
  4. Industrial Automation: It can be utilized in industrial control systems for signal translation between different subsystems.
  5. Automotive Electronics: It assists in connecting components with varying voltage requirements in automotive applications.

Detailed and Complete Alternative Models

  1. SN74LVC245APW: Low-Voltage CMOS Octal Bus Transceiver
  2. SN74HCT245PW: High-Speed CMOS Octal Bus Transceiver
  3. SN74LVCH245APW: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
  4. SN74AHCT245PW: Octal Bus Transceiver with 3-State Outputs

These alternative models offer similar functionality to the SN74AHC245PW but may have differences in characteristics, package type, or operating voltage range.

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Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af SN74AHC245PW i tekniske løsninger

Sure! Here are 10 common questions and answers related to the application of SN74AHC245PW:

  1. Q: What is SN74AHC245PW? A: SN74AHC245PW 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 SN74AHC245PW? A: The operating voltage range of SN74AHC245PW is typically between 2V and 5.5V.

  3. Q: How many bidirectional channels does SN74AHC245PW have? A: SN74AHC245PW has 8 bidirectional channels, allowing for the simultaneous transmission of data in both directions.

  4. Q: Can SN74AHC245PW handle high-speed data transfer? A: Yes, SN74AHC245PW is designed to support high-speed data transfer up to 100 MHz.

  5. Q: What is the maximum output current of SN74AHC245PW? A: The maximum output current per channel of SN74AHC245PW is typically 8 mA.

  6. Q: Does SN74AHC245PW have built-in ESD protection? A: Yes, SN74AHC245PW has built-in ESD protection, making it more robust against electrostatic discharge.

  7. Q: Can SN74AHC245PW be used for level shifting between different voltage domains? A: Yes, SN74AHC245PW can be used for level shifting between different voltage domains, as long as the voltage levels are within its operating range.

  8. Q: Is SN74AHC245PW compatible with TTL logic levels? A: Yes, SN74AHC245PW is compatible with TTL logic levels, making it suitable for interfacing with TTL-based devices.

  9. Q: Can SN74AHC245PW be used in both 3.3V and 5V systems? A: Yes, SN74AHC245PW can be used in both 3.3V and 5V systems, thanks to its wide operating voltage range.

  10. Q: What is the package type of SN74AHC245PW? A: SN74AHC245PW is available in a TSSOP (Thin Shrink Small Outline Package) package, which is compact and suitable for space-constrained applications.

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