Encyclopedia Entry: 74ACT245SJ

Product Overview

Category

The 74ACT245SJ belongs to the category of integrated circuits (ICs) and specifically falls under the family of bus transceivers.

Use

This IC is primarily used for bidirectional data transfer between different buses or systems. It enables the seamless exchange of digital information in a reliable and efficient manner.

Characteristics

• Bidirectional data transfer capability
• High-speed operation
• Low power consumption
• Wide operating voltage range
• Robust design for noise immunity

Package

The 74ACT245SJ is available in a standard 20-pin small outline integrated circuit (SOIC) package. This package offers ease of handling and compatibility with various PCB designs.

Essence

The essence of the 74ACT245SJ lies in its ability to facilitate the bidirectional transfer of digital data signals, ensuring smooth communication between different bus systems.

Packaging/Quantity

The 74ACT245SJ is typically packaged in reels or tubes, containing a quantity of 250 units per package.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Input/Output Logic Compatibility: TTL/CMOS
• Maximum Data Transfer Rate: 120MHz
• Output Drive Capability: ±24mA

Detailed Pin Configuration

The 74ACT245SJ features a total of 20 pins, each serving a specific function. The pin configuration is as follows:

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

Functional Features

The key functional features of the 74ACT245SJ include:

• Bidirectional data transfer between two buses
• Output enable control for tristate operation
• Direction control for selecting the data flow direction
• High-speed operation for efficient data exchange
• Compatibility with TTL and CMOS logic levels
• Robust design to minimize noise interference

Advantages and Disadvantages

Advantages

• Enables seamless bidirectional data transfer
• Supports high-speed operation
• Low power consumption
• Wide operating voltage range allows compatibility with various systems
• Robust design ensures reliable performance

Disadvantages

• Limited number of data bits (8 bits in this case)
• Requires careful consideration of bus direction control to avoid conflicts

Working Principles

The 74ACT245SJ operates based on the principles of digital logic. It utilizes internal circuitry to control the direction of data flow between two buses. The direction control input determines whether the data is transferred from Bus A to Bus B or vice versa. The output enable control allows tristate operation, enabling the IC to be effectively disconnected from the bus when not in use.

Detailed Application Field Plans

The 74ACT245SJ finds applications in various fields, including:

1. Microprocessor systems
2. Data communication networks
3. Industrial automation
4. Automotive electronics
5. Consumer electronics

In microprocessor systems, it facilitates data transfer between the processor and peripheral devices. In data communication networks, it enables seamless exchange of data between different nodes. In industrial automation, it plays a crucial role in connecting various control modules. In automotive electronics, it aids in data transmission within the vehicle's electronic systems. In consumer electronics, it is utilized for interconnecting different components.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74ACT245SJ include:

1. 74HC245: A CMOS-based octal bus transceiver with similar characteristics.
2. SN74LV245A: A low-voltage octal bus transceiver suitable for battery-powered applications.
3. CD74HCT245: A high-speed CMOS octal bus transceiver with TTL compatibility.

These alternative models can be considered based on specific requirements such as voltage levels,