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SN74LVCH245APWT
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SN74LVCH245APWT

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Level Shifter and Bus Transceiver
  • Characteristics: Low-Voltage CMOS Logic, 8-bit Bidirectional Voltage-Level Translator
  • Package: TSSOP (Thin Shrink Small Outline Package)
  • Essence: This IC is designed to facilitate bidirectional voltage-level translation between different logic levels. It can be used to interface devices operating at different voltage levels.
  • Packaging/Quantity: Available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

  • Supply Voltage Range: 1.65V to 5.5V
  • High-Level Input Voltage: 2.3V to VCC + 0.5V
  • Low-Level Input Voltage: -0.5V to 0.8V
  • High-Level Output Voltage: VCC - 0.5V
  • Low-Level Output Voltage: 0.5V
  • Maximum Input Current: ±10mA
  • Maximum Output Current: ±32mA
  • Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The SN74LVCH245APWT has a total of 20 pins. The pin configuration is as follows:

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

Functional Features

  • Bidirectional voltage-level translation between different logic levels.
  • 8-bit data width for simultaneous bidirectional data transfer.
  • Output enable control for disabling the outputs.
  • Direction control input for selecting the direction of data flow.

Advantages and Disadvantages

Advantages: - Supports level shifting between different voltage domains. - Simultaneous bidirectional data transfer. - Low-voltage operation. - Compact TSSOP package for space-constrained applications.

Disadvantages: - Limited maximum output current. - Not suitable for high-speed applications.

Working Principles

The SN74LVCH245APWT operates by using a combination of CMOS logic gates to perform voltage-level translation. It utilizes a bidirectional transceiver architecture, allowing data to be transferred in both directions. The direction of data flow is controlled by the DIR pin. When the DIR pin is set to a specific logic level, the corresponding data inputs and outputs are enabled.

Detailed Application Field Plans

The SN74LVCH245APWT can be used in various applications that require voltage-level translation between different logic levels. Some potential application fields include:

  1. Microcontroller interfacing with peripherals operating at different voltage levels.
  2. Communication interfaces between devices with different logic voltage requirements.
  3. Level shifting in battery-powered portable devices.
  4. Industrial automation systems requiring signal conversion between different voltage domains.

Detailed and Complete Alternative Models

  1. SN74LVC245A: Similar functionality with improved speed performance.
  2. SN74AVC4T245: 4-bit bidirectional voltage-level translator with higher maximum output current.
  3. SN74LVC1T45: Single-bit bidirectional voltage-level translator for space-constrained applications.

These alternative models provide similar functionality to the SN74LVCH245APWT but may offer different specifications or package options to suit specific application requirements.

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10個與SN74LVCH245APWT在技術方案中應用相關的常見問題與解答

Sure! Here are 10 common questions and answers related to the application of SN74LVCH245APWT:

  1. Q: What is SN74LVCH245APWT? A: SN74LVCH245APWT is a type of integrated circuit (IC) commonly used as a bidirectional level shifter or voltage translator.

  2. Q: What is the purpose of using SN74LVCH245APWT in a technical solution? A: SN74LVCH245APWT is used to interface between two systems operating at different voltage levels, ensuring proper signal translation and communication.

  3. Q: What voltage levels can SN74LVCH245APWT support? A: SN74LVCH245APWT supports voltage translation between 3.3V and 5V systems.

  4. Q: How many channels does SN74LVCH245APWT have? A: SN74LVCH245APWT has 8 bidirectional channels, allowing for simultaneous translation of multiple signals.

  5. Q: Can SN74LVCH245APWT handle high-speed data transmission? A: Yes, SN74LVCH245APWT is designed to support high-speed data transmission up to 100 MHz.

  6. Q: Is SN74LVCH245APWT compatible with both CMOS and TTL logic levels? A: Yes, SN74LVCH245APWT is compatible with both CMOS and TTL logic levels, making it versatile for various applications.

  7. Q: Does SN74LVCH245APWT require external pull-up or pull-down resistors? A: No, SN74LVCH245APWT has built-in weak pull-up and pull-down resistors, eliminating the need for external components in most cases.

  8. Q: Can SN74LVCH245APWT handle bi-directional communication? A: Yes, SN74LVCH245APWT supports bidirectional data transfer, allowing signals to be translated in both directions.

  9. Q: What is the maximum current that SN74LVCH245APWT can source or sink? A: SN74LVCH245APWT can source or sink up to 32 mA of current per channel.

  10. Q: Are there any special considerations when designing with SN74LVCH245APWT? A: It is important to ensure proper decoupling and bypass capacitors are used near the IC to minimize noise and maintain signal integrity.

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