Encyclopedia Entry: 74ACT245MSA

Product Overview

Category

The 74ACT245MSA belongs to the category of integrated circuits (ICs) and specifically falls under the family of bus transceivers.

Use

This IC is commonly used for bidirectional data transfer between two buses with different voltage levels. It acts as a buffer, allowing seamless communication between systems operating at different voltage levels.

Characteristics

• Bidirectional data transfer
• Voltage level translation
• High-speed operation
• Low power consumption
• Wide operating temperature range

Package

The 74ACT245MSA is available in a small outline integrated circuit (SOIC) package. This package offers compactness and ease of integration into various electronic systems.

Essence

The essence of the 74ACT245MSA lies in its ability to facilitate efficient and reliable data transfer between buses operating at different voltage levels.

Packaging/Quantity

The IC is typically packaged in reels or tubes, containing a specific quantity of units per package. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Supply Voltage: 2.0V - 6.0V
• Operating Temperature Range: -40°C to +85°C
• Input/Output Compatibility: TTL/CMOS
• Maximum Data Rate: 120MHz
• Number of Channels: 8

Detailed Pin Configuration

The 74ACT245MSA features a dual in-line package (DIP) with a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) 1
2. A1 (Data Bus A) 1
3. A2 (Data Bus A) 2
4. A3 (Data Bus A) 3
5. A4 (Data Bus A) 4
6. A5 (Data Bus A) 5
7. A6 (Data Bus A) 6
8. A7 (Data Bus A) 7
9. GND (Ground)
10. B7 (Data Bus B) 7
11. B6 (Data Bus B) 6
12. B5 (Data Bus B) 5
13. B4 (Data Bus B) 4
14. B3 (Data Bus B) 3
15. B2 (Data Bus B) 2
16. B1 (Data Bus B) 1
17. VCC (Supply Voltage)
18. DIR (Direction Control)
19. OE (Output Enable) 2
20. NC (No Connection)

Functional Features

• Bidirectional data transfer between two buses with different voltage levels
• Automatic direction control based on the DIR pin
• Output enable/disable functionality for bus isolation
• TTL/CMOS compatible inputs and outputs
• High-speed operation for efficient data transfer
• Low power consumption for energy efficiency

Advantages and Disadvantages

Advantages

• Facilitates seamless communication between systems operating at different voltage levels
• Provides bidirectional data transfer capability
• Offers automatic direction control and output enable/disable functionality
• Supports high-speed operation
• Low power consumption enhances energy efficiency

Disadvantages

• Limited to a maximum data rate of 120MHz
• Requires careful consideration of voltage compatibility with connected systems

Working Principles

The 74ACT245MSA operates by receiving data from one bus and transmitting it to another, while simultaneously translating the voltage levels between the two buses. The direction of data flow is controlled by the DIR pin. When enabled, the IC allows bidirectional data transfer, and when disabled, it isolates the buses.

Detailed Application Field Plans

The 74ACT245MSA finds applications in various fields where data transfer between buses with different voltage levels is required. Some specific application areas include:

1. Industrial automation systems
2. Automotive electronics
3. Communication equipment
4. Consumer electronics
5. Medical devices

Detailed and Complete Alternative Models

• 74HCT245: Similar functionality, but operates at a lower voltage range (4.5V - 5.5V)
• SN74LVC245A: Offers similar bidirectional data transfer, but with lower power consumption
• CD74HC245: Provides comparable voltage level translation capabilities, but with a different pin configuration

These alternative models can be considered based on specific requirements and compatibility with the target system.

In conclusion, the 74ACT245MSA is a versatile bus transceiver IC that enables efficient data transfer between buses operating at different voltage levels. Its bidirectional capability, automatic direction control, and low power consumption make it suitable for various applications in different industries.