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74ACT245SC
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Encyclopedia Entry: 74ACT245SC

Product Overview

Category

The 74ACT245SC belongs to the category of integrated circuits (ICs) and specifically falls under the group of digital logic devices.

Use

This product is commonly used for signal level shifting in digital systems. It allows bidirectional voltage translation between different logic levels, making it suitable for interfacing between devices operating at different voltage levels.

Characteristics

  • Bidirectional voltage translation
  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
  • Compatibility with various logic families

Package

The 74ACT245SC is available in a standard 20-pin small outline integrated circuit (SOIC) package. This package offers good thermal performance and ease of handling during assembly.

Essence

The essence of the 74ACT245SC lies in its ability to facilitate seamless communication between digital devices operating at different voltage levels, ensuring reliable data transfer and compatibility.

Packaging/Quantity

The 74ACT245SC is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the manufacturer and supplier.

Specifications

  • Supply Voltage Range: 2.0V to 6.0V
  • Logic Family: ACT
  • Number of Channels: 8
  • Input/Output Compatibility: TTL, CMOS
  • Maximum Operating Frequency: X MHz
  • Propagation Delay: Y ns
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

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

Functional Features

  • Bidirectional voltage translation between two logic levels
  • Non-inverting operation
  • High-speed data transfer
  • Low power consumption
  • Schmitt-trigger inputs for noise immunity
  • Output enable control for flexible usage

Advantages and Disadvantages

Advantages

  • Enables seamless communication between devices operating at different voltage levels
  • Wide operating voltage range allows compatibility with various logic families
  • High-speed operation facilitates fast data transfer
  • Low power consumption contributes to energy efficiency
  • Schmitt-trigger inputs provide noise immunity

Disadvantages

  • Limited number of channels (8 in this case)
  • Requires careful consideration of voltage level compatibility to avoid signal degradation or damage

Working Principles

The 74ACT245SC operates based on the principles of voltage level shifting. It utilizes a combination of transistors, resistors, and other electronic components to convert input signals from one logic level to another. The bidirectional nature of the device allows for seamless translation of signals in both directions.

Detailed Application Field Plans

The 74ACT245SC finds applications in various digital systems where voltage level shifting is required. Some common application fields include:

  1. Microcontroller interfacing with different peripheral devices
  2. Communication interfaces between devices operating at different logic levels
  3. Data transmission between modules in embedded systems
  4. Signal translation in mixed-voltage systems

Detailed and Complete Alternative Models

  1. 74HCT245: Similar functionality but operates at a lower voltage range (4.5V to 5.5V)
  2. 74LS245: Compatible with TTL logic family, but has slower speed compared to the ACT series
  3. 74HC245: Operates at a higher voltage range (2.0V to 6.0V) and compatible with CMOS logic family

Note: The above alternative models are just a few examples, and there are several other alternatives available in the market.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av 74ACT245SC i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of 74ACT245SC in technical solutions:

  1. Q: What is the purpose of the 74ACT245SC? A: The 74ACT245SC is an octal bus transceiver that facilitates bidirectional data transfer between two buses.

  2. Q: What voltage levels does the 74ACT245SC support? A: The 74ACT245SC supports a wide range of voltage levels, typically from 2V to 6V.

  3. Q: How many data lines can the 74ACT245SC handle? A: The 74ACT245SC can handle up to 8 data lines, making it suitable for applications involving parallel data transfer.

  4. Q: Can the 74ACT245SC be used for level shifting between different voltage domains? A: Yes, the 74ACT245SC can be used for level shifting as it supports bidirectional data transfer between different voltage domains.

  5. Q: What is the maximum data transfer rate supported by the 74ACT245SC? A: The 74ACT245SC can support high-speed data transfer rates of up to 200MHz.

  6. Q: Does the 74ACT245SC have any built-in protection features? A: Yes, the 74ACT245SC has built-in ESD protection on all inputs and outputs, ensuring reliability in harsh environments.

  7. Q: Can the 74ACT245SC be cascaded to increase the number of data lines? A: Yes, multiple 74ACT245SC devices can be cascaded together to increase the number of data lines in a system.

  8. Q: Is the 74ACT245SC compatible with TTL logic levels? A: Yes, the 74ACT245SC is compatible with both TTL and CMOS logic levels, making it versatile for various applications.

  9. Q: Can the 74ACT245SC be used in bus arbitration scenarios? A: Yes, the 74ACT245SC can be used in bus arbitration scenarios to control data flow between multiple devices on a bus.

  10. Q: Are there any specific power supply requirements for the 74ACT245SC? A: The 74ACT245SC typically requires a single power supply voltage ranging from 4.5V to 5.5V for proper operation.

Please note that these answers are general and may vary depending on the specific application and implementation of the 74ACT245SC.