Texas Instruments
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CD74ACT245MG4
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CD74ACT245MG4

Product Overview

  • Category: Integrated Circuit
  • Use: Signal Level Shifter
  • Characteristics: High-Speed, Octal Bus Transceiver
  • Package: 20-pin SOIC (Small Outline Integrated Circuit)
  • Essence: Transfers data between two bidirectional bus systems operating at different voltage levels
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage: 2.0V to 6.0V
  • Input Voltage Levels: VIL = 0.8V, VIH = 2.0V
  • Output Voltage Levels: VOL = 0.5V, VOH = VCC - 0.5V
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay: 7ns (typical)
  • Output Drive Capability: ±24mA

Detailed Pin Configuration

The CD74ACT245MG4 has a total of 20 pins, which are assigned as follows:

  1. OE (Output Enable) - Active Low Output Enable Input
  2. DIR (Direction Control) - Direction Control Input
  3. A1-A8 (Data Bus A) - Bidirectional Data Bus A
  4. GND (Ground) - Ground Reference
  5. B1-B8 (Data Bus B) - Bidirectional Data Bus B
  6. VCC (Positive Power Supply) - Positive Power Supply
  7. NC (No Connection) - No Connection
  8. NC (No Connection) - No Connection
  9. NC (No Connection) - No Connection
  10. NC (No Connection) - No Connection
  11. NC (No Connection) - No Connection
  12. NC (No Connection) - No Connection
  13. NC (No Connection) - No Connection
  14. NC (No Connection) - No Connection
  15. NC (No Connection) - No Connection
  16. NC (No Connection) - No Connection
  17. NC (No Connection) - No Connection
  18. NC (No Connection) - No Connection
  19. VCC (Positive Power Supply) - Positive Power Supply
  20. GND (Ground) - Ground Reference

Functional Features

  • Bidirectional data transfer between two bus systems with different voltage levels
  • High-speed operation suitable for applications requiring fast data transmission
  • Output enable control for easy interfacing with other devices
  • Direction control input to select the direction of data flow

Advantages and Disadvantages

Advantages

  • Supports bidirectional data transfer, enabling versatile use in various applications
  • High-speed operation allows for efficient data transmission
  • Wide supply voltage range provides flexibility in different voltage level systems
  • Output enable control enhances compatibility with other devices

Disadvantages

  • Limited number of pins may restrict the number of data lines that can be transferred simultaneously
  • Not suitable for applications requiring very low power consumption

Working Principles

The CD74ACT245MG4 is an octal bus transceiver designed to transfer data between two bidirectional bus systems operating at different voltage levels. It uses a combination of input/output buffers and control circuitry to achieve bidirectional data transfer.

The direction of data flow is controlled by the DIR pin. When DIR is set to logic high, data is transferred from Bus A to Bus B. Conversely, when DIR is set to logic low, data is transferred from Bus B to Bus A.

The OE pin is used to enable or disable the outputs. When OE is set to logic low, the outputs are enabled, allowing data to be transferred. When OE is set to logic high, the outputs are disabled, effectively isolating the two bus systems.

Detailed Application Field Plans

The CD74ACT245MG4 is commonly used in various applications that require bidirectional data transfer between bus systems operating at different voltage levels. Some of the typical application fields include:

  1. Microcontroller interfacing with external memory or peripherals
  2. Communication systems involving multiple buses with different voltage levels
  3. Data acquisition and control systems
  4. Industrial automation and control systems
  5. Automotive electronics

Detailed and Complete Alternative Models

  • SN74ACT245: Similar octal bus transceiver from Texas Instruments
  • 74HCT245: Octal bus transceiver with TTL compatibility from NXP Semiconductors
  • MC74ACT245: Octal bus transceiver with similar characteristics from ON Semiconductor

These alternative models offer similar functionality and can be considered as replacements for the CD74ACT245MG4 depending on specific requirements and availability.

In conclusion, the CD74ACT245MG4 is a high-speed octal bus transceiver integrated circuit designed for bidirectional data transfer between bus systems operating at different voltage levels. Its versatile use, fast operation, and compatibility features make it

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací CD74ACT245MG4 v technických řešeních

Sure! Here are 10 common questions and answers related to the application of CD74ACT245MG4 in technical solutions:

  1. Q: What is CD74ACT245MG4? A: CD74ACT245MG4 is a type of octal bus transceiver with 3-state outputs, commonly used for bidirectional data transfer between different voltage levels.

  2. Q: What is the operating voltage range of CD74ACT245MG4? A: CD74ACT245MG4 operates within a voltage range of 2V to 6V.

  3. Q: Can CD74ACT245MG4 handle both TTL and CMOS logic levels? A: Yes, CD74ACT245MG4 is compatible with both TTL and CMOS logic levels.

  4. Q: How many input/output pins does CD74ACT245MG4 have? A: CD74ACT245MG4 has 8 input/output pins, making it suitable for bidirectional data transfer between two systems.

  5. Q: What is the maximum data transfer rate supported by CD74ACT245MG4? A: CD74ACT245MG4 can support data transfer rates up to 125 MHz.

  6. Q: Can CD74ACT245MG4 be used for level shifting applications? A: Yes, CD74ACT245MG4 can be used for level shifting as it supports bidirectional data transfer between different voltage levels.

  7. Q: Does CD74ACT245MG4 have built-in protection against electrostatic discharge (ESD)? A: Yes, CD74ACT245MG4 has built-in ESD protection, which helps safeguard the device from damage during handling or operation.

  8. Q: Can CD74ACT245MG4 be used in high-speed communication interfaces? A: Yes, CD74ACT245MG4 is suitable for high-speed communication interfaces like UART, SPI, or I2C.

  9. Q: What is the power supply voltage required for CD74ACT245MG4? A: CD74ACT245MG4 requires a power supply voltage of 5V.

  10. Q: Can CD74ACT245MG4 be used in automotive applications? A: Yes, CD74ACT245MG4 is qualified for automotive applications and can operate within the specified temperature range for automotive environments.

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