Encyclopedia Entry: 74HCT245DTR2G

Product Overview

Category

The 74HCT245DTR2G belongs to the category of integrated circuits (ICs) and specifically falls under the group of digital logic level shifters.

Use

This IC is commonly used for voltage level shifting in digital systems. It allows for bidirectional communication between devices operating at different voltage levels.

Characteristics

• Voltage Level Shifting: The 74HCT245DTR2G enables the translation of signals between two voltage domains, making it suitable for interfacing devices with different voltage requirements.
• Bidirectional Communication: This IC supports both input and output signal translation, allowing for seamless data transfer between devices.
• High-Speed Operation: With a maximum propagation delay of X nanoseconds, the 74HCT245DTR2G ensures efficient signal transmission in time-critical applications.
• Low Power Consumption: This IC is designed to operate with low power consumption, making it suitable for battery-powered devices.
• Wide Operating Voltage Range: The 74HCT245DTR2G can handle voltage levels ranging from X volts to Y volts, providing flexibility in various applications.

Package and Quantity

The 74HCT245DTR2G is available in a surface-mount SOIC-20 package. It is typically sold in reels containing Z units per reel.

Specifications

• Supply Voltage Range: X volts to Y volts
• Input Voltage Levels:
  • Low-Level Input Voltage: X volts
  • High-Level Input Voltage: Y volts
• Output Voltage Levels:
  • Low-Level Output Voltage: X volts
  • High-Level Output Voltage: Y volts
• Maximum Propagation Delay: X nanoseconds
• Operating Temperature Range: X°C to Y°C
• Package Type: SOIC-20

Pin Configuration

The 74HCT245DTR2G has a total of 20 pins, which are assigned specific functions as follows:

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

Functional Features

The 74HCT245DTR2G offers the following functional features:

• Bidirectional Level Shifting: This IC allows for bidirectional voltage level shifting between two voltage domains, enabling seamless communication between devices operating at different voltage levels.
• Direction Control: The DIR pin determines the direction of data flow, allowing users to control the input and output paths.
• Output Enable: The OE pin enables or disables the outputs, providing flexibility in managing data transmission.

Advantages and Disadvantages

Advantages

• Efficient Voltage Level Shifting: The 74HCT245DTR2G ensures reliable and accurate signal translation between different voltage domains.
• Bidirectional Communication: This IC supports bidirectional data transfer, simplifying the design of systems with mixed voltage devices.
• Low Power Consumption: The 74HCT245DTR2G operates with low power consumption, making it suitable for energy-efficient applications.

Disadvantages

• Limited Voltage Range: While the 74HCT245DTR2G offers a wide operating voltage range, it may not be compatible with extremely high or low voltage systems.
• Propagation Delay: The IC has a maximum propagation delay, which can impact real-time applications requiring fast signal transmission.

Working Principles

The 74HCT245DTR2G utilizes a combination of MOSFETs and CMOS technology to achieve voltage level shifting. When the DIR pin is set to a specific logic level, the IC determines the direction of data flow. The OE pin enables or disables the outputs, allowing users to control the transmission of data.

Application Field Plans

The 74HCT245DTR2G finds application in various fields, including:

1. Microcontroller Interfacing: It facilitates communication between microcontrollers operating at different voltage levels. 2