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CD74ACT245EG4
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CD74ACT245EG4

Overview

  • Category: Integrated Circuit
  • Use: Signal Level Shifter
  • Characteristics: High-Speed, Low-Power, Non-Inverting
  • Package: 20-pin TSSOP (Thin Shrink Small Outline Package)
  • Essence: Bi-directional level shifter for digital signals
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 2 V to 6 V
  • Input Voltage Range: 0 V to VCC
  • Output Voltage Range: 0 V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay Time: 5.5 ns (typical)
  • Output Drive Capability: ±24 mA

Pin Configuration

The CD74ACT245EG4 has a total of 20 pins arranged as follows:

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

Functional Features

  • Bi-directional level shifting between two voltage domains
  • Non-inverting signal translation
  • High-speed operation
  • Low-power consumption
  • 3-state outputs for bus-oriented applications
  • ESD (Electrostatic Discharge) protection on all inputs and outputs

Advantages

  • Allows interfacing between devices operating at different voltage levels
  • Provides reliable signal translation without introducing significant delays
  • Supports high-speed data transmission
  • Low power consumption helps in reducing overall system energy requirements
  • ESD protection ensures robustness against electrostatic discharge events

Disadvantages

  • Limited to a specific number of input/output channels (8 in this case)
  • Requires careful consideration of voltage compatibility between connected devices
  • May not be suitable for applications requiring bidirectional communication with more than 8 channels

Working Principles

The CD74ACT245EG4 is designed to shift digital signals between two voltage domains. It operates by receiving input signals from one domain and translating them to the corresponding voltage level in the other domain. The direction of translation is controlled by the DIR pin, while the OE pin enables or disables the output.

Detailed Application Field Plans

The CD74ACT245EG4 can be used in various applications where there is a need to interface between devices operating at different voltage levels. Some potential application fields include:

  1. Microcontroller interfacing with peripheral devices
  2. Communication interfaces between different logic families
  3. Level shifting in mixed-voltage systems
  4. Bus transceivers in computer systems
  5. Signal translation in industrial automation

Detailed and Complete Alternative Models

  1. SN74ACT245: Similar functionality, available in different package options
  2. MC74ACT245: Equivalent level shifter with slightly different specifications
  3. CD74HCT245: Compatible with TTL logic levels, suitable for mixed-voltage systems

These alternative models offer similar functionality to the CD74ACT245EG4 and can be considered based on specific requirements and availability.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av CD74ACT245EG4 i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of CD74ACT245EG4 in technical solutions:

  1. Q: What is CD74ACT245EG4? A: CD74ACT245EG4 is a type of octal bus transceiver with 3-state outputs, commonly used for level shifting and signal buffering in digital circuits.

  2. Q: What is the operating voltage range of CD74ACT245EG4? A: CD74ACT245EG4 operates within a voltage range of 2V to 6V.

  3. Q: How many bidirectional data lines can CD74ACT245EG4 handle? A: CD74ACT245EG4 can handle 8 bidirectional data lines.

  4. Q: Can CD74ACT245EG4 be used for voltage level translation between different logic families? A: Yes, CD74ACT245EG4 is commonly used for voltage level translation between TTL and CMOS logic families.

  5. Q: What is the maximum data transfer rate supported by CD74ACT245EG4? A: CD74ACT245EG4 supports a maximum data transfer rate of 24 MHz.

  6. Q: Does CD74ACT245EG4 have built-in ESD protection? A: Yes, CD74ACT245EG4 has built-in ESD protection, making it more robust against electrostatic discharge.

  7. Q: Can CD74ACT245EG4 be used as a bidirectional level shifter? A: Yes, CD74ACT245EG4 can be used as a bidirectional level shifter, allowing data transfer between systems with different voltage levels.

  8. Q: What is the output drive capability of CD74ACT245EG4? A: CD74ACT245EG4 has a typical output drive capability of ±24 mA.

  9. Q: Can CD74ACT245EG4 be used in high-speed applications? A: Yes, CD74ACT245EG4 is suitable for high-speed applications due to its fast propagation delay and transition times.

  10. Q: Is CD74ACT245EG4 available in different package options? A: Yes, CD74ACT245EG4 is available in various package options, such as SOIC, TSSOP, and PDIP, providing flexibility for different PCB layouts and assembly processes.

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