Encyclopedia Entry: 74ACT245SC_NL

Product Overview

Category

The 74ACT245SC_NL belongs to the category of integrated circuits (ICs) and specifically falls under the group of digital logic devices.

Use

This product is commonly used for signal level shifting in digital systems. It facilitates the bidirectional transfer of data between two buses operating at different voltage levels.

Characteristics

• Voltage Level Shifting: The 74ACT245SC_NL allows for seamless data transfer between buses with varying voltage levels.
• Bidirectional Communication: It supports data transmission in both directions, enabling efficient communication between different parts of a digital system.
• High-Speed Operation: This IC operates at high speeds, making it suitable for applications requiring fast data transfer.
• Compatibility: The 74ACT245SC_NL is compatible with various logic families, including TTL and CMOS.

Package and Quantity

The 74ACT245SC_NL is available in a standard surface mount package. The package type is SOIC (Small Outline Integrated Circuit), which ensures easy integration onto circuit boards. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 2.0V to 6.0V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay: 10ns
• Maximum Output Current: ±24mA

Pin Configuration

The 74ACT245SC_NL features a 20-pin configuration. Below is a detailed pinout description:

1. DIR: Direction Control Input
2. OE: Output Enable Input
3. A1-A8: Data Bus A Inputs/Outputs
4. B1-B8: Data Bus B Inputs/Outputs
5. GND: Ground
6. B8: Data Bus B, Bit 8
7. B7: Data Bus B, Bit 7
8. B6: Data Bus B, Bit 6
9. B5: Data Bus B, Bit 5
10. B4: Data Bus B, Bit 4
11. B3: Data Bus B, Bit 3
12. B2: Data Bus B, Bit 2
13. B1: Data Bus B, Bit 1
14. VCC: Supply Voltage
15. A1: Data Bus A, Bit 1
16. A2: Data Bus A, Bit 2
17. A3: Data Bus A, Bit 3
18. A4: Data Bus A, Bit 4
19. A5: Data Bus A, Bit 5
20. A6: Data Bus A, Bit 6

Functional Features

The 74ACT245SC_NL offers the following functional features:

• Bidirectional Data Transfer: It allows data to be transmitted bidirectionally between two buses, controlled by the DIR input.
• Output Enable Control: The OE input enables or disables the outputs, providing flexibility in controlling data flow.
• Voltage Level Shifting: This IC ensures seamless data transfer between buses operating at different voltage levels.
• High-Speed Operation: The 74ACT245SC_NL operates at high speeds, making it suitable for time-critical applications.

Advantages and Disadvantages

Advantages

• Efficient Signal Level Shifting: Enables communication between buses with different voltage levels.
• Bidirectional Data Transfer: Facilitates data transmission in both directions.
• Compatibility: Works well with various logic families, expanding its application range.
• High-Speed Operation: Allows for fast data transfer, ensuring efficient system performance.

Disadvantages

• Limited Voltage Range: The 74ACT245SC_NL operates within a specific voltage range, which may not be suitable for all applications.
• Power Consumption: Like most integrated circuits, it consumes power during operation.

Working Principles

The 74ACT245SC_NL utilizes a combination of transistors and logic gates to achieve its functionality. It employs level-shifting techniques to ensure seamless data transfer between buses operating at different voltage levels. The DIR input controls the direction of data flow, while the OE input enables or disables the outputs. By properly configuring these control inputs, bidirectional data transfer can be achieved.

Application Field Plans

The 74ACT245SC_NL finds application in various digital systems where signal level shifting is required. Some common application fields include:

1. Microcontroller Interfacing: It facilitates communication between microcontrollers operating at different voltage levels.
2. Data Communication Systems: Enables data transfer between devices with varying voltage requirements, such as UART or SPI interfaces.
3. Industrial Automation: Used in PLCs (Programmable Logic Controllers) to interface with sensors and actuators operating at different voltage levels.