Encyclopedia Entry: 74AC245PC

Product Overview

Category

The 74AC245PC belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital logic devices.

Use

This product is commonly used as a bidirectional octal bus transceiver. It facilitates the transfer of data between two buses with different voltage levels, making it an essential component in various digital systems.

Characteristics

• Bidirectional data transfer capability
• Eight input/output channels
• Wide operating voltage range
• High-speed operation
• Low power consumption

Package

The 74AC245PC is typically available in a 20-pin plastic dual in-line package (DIP). This package provides mechanical protection and facilitates easy integration into circuit boards.

Essence

The essence of the 74AC245PC lies in its ability to enable efficient and reliable data communication between different buses within a digital system.

Packaging/Quantity

This product is commonly sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier and customer requirements.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 5ns (max)
• Output Current: ±24mA

Detailed Pin Configuration

The 74AC245PC features a total of 20 pins, each serving a specific function. The pin configuration is as follows:

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

Functional Features

The key functional features of the 74AC245PC include:

1. Bidirectional Data Transfer: The device allows data to be transferred bidirectionally between two buses, enabling efficient communication.
2. High-Speed Operation: With a propagation delay time of only 5ns, the 74AC245PC ensures fast and reliable data transfer.
3. Output Enable Control: The OE pin enables or disables the outputs, providing flexibility in controlling the data flow.
4. Direction Control: The DIR pin determines the direction of data transfer, allowing for versatile usage scenarios.

Advantages and Disadvantages

Advantages

• Efficient bidirectional data transfer
• Wide operating voltage range
• High-speed operation
• Low power consumption
• Versatile application possibilities

Disadvantages

• Limited number of input/output channels (eight channels)

Working Principles

The 74AC245PC operates based on the principles of digital logic. It utilizes transistors and other electronic components to enable bidirectional data transfer between two buses. The device's internal circuitry ensures proper voltage level conversion and direction control, facilitating seamless communication.

Detailed Application Field Plans

The 74AC245PC finds applications in various digital systems, including but not limited to:

1. Microprocessor Interfacing: It enables communication between a microprocessor and external devices, such as memory modules or input/output peripherals.
2. Data Communication Systems: The device facilitates data transfer between different subsystems within communication systems, ensuring efficient data flow.
3. Industrial Automation: It plays a crucial role in connecting various components of industrial automation systems, enabling reliable control and monitoring.
4. Automotive Electronics: The 74AC245PC is utilized in automotive electronics for interfacing different modules and subsystems, enhancing overall functionality.

Detailed and Complete Alternative Models

Some alternative models that serve similar functions to the 74AC245PC include:

1. 74HC245: This model offers similar bidirectional bus transceiver capabilities with slightly different electrical characteristics.
2. 74LS245: It provides comparable functionality but operates at lower speeds compared to