Encyclopedia Entry: 74ACT652SC

Product Overview

Category

The 74ACT652SC belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital logic devices.

Use

This IC is commonly used for data bus transceiver applications in various electronic systems. It facilitates bidirectional data transfer between two separate buses, making it ideal for interfacing different components or subsystems within a larger system.

Characteristics

• The 74ACT652SC is designed to operate with a supply voltage range of 4.5V to 5.5V.
• It offers high-speed performance, with typical propagation delays of only a few nanoseconds.
• This IC features eight bidirectional buffers with separate output enable controls, allowing flexible data flow control.
• It supports both TTL and CMOS voltage levels, ensuring compatibility with a wide range of devices.

Package

The 74ACT652SC is available in a standard 24-pin small-outline integrated circuit (SOIC) package. This package provides mechanical protection and convenient mounting options for easy integration into electronic systems.

Essence

The essence of the 74ACT652SC lies in its ability to efficiently transmit data bidirectionally between two buses, enabling seamless communication between different parts of a system.

Packaging/Quantity

The 74ACT652SC is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier and customer requirements.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Levels:
  • High Level (VIH): 2.0V to VCC + 0.5V
  • Low Level (VIL): -0.5V to 0.8V
• Output Voltage Levels:
  • High Level (VOH): VCC - 0.5V
  • Low Level (VOL): 0.4V
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay: 6ns

Detailed Pin Configuration

The 74ACT652SC features a total of 24 pins, each serving a specific function. The pin configuration is as follows:

1. OEAB: Output Enable for Bus A
2. I/OB0: Bidirectional Data I/O for Bus B, Bit 0
3. I/OB1: Bidirectional Data I/O for Bus B, Bit 1
4. GND: Ground
5. I/OB2: Bidirectional Data I/O for Bus B, Bit 2
6. I/OB3: Bidirectional Data I/O for Bus B, Bit 3
7. VCC: Supply Voltage
8. I/OB4: Bidirectional Data I/O for Bus B, Bit 4
9. I/OB5: Bidirectional Data I/O for Bus B, Bit 5
10. I/OB6: Bidirectional Data I/O for Bus B, Bit 6
11. I/OB7: Bidirectional Data I/O for Bus B, Bit 7
12. OEBA: Output Enable for Bus B
13. I/OA7: Bidirectional Data I/O for Bus A, Bit 7
14. I/OA6: Bidirectional Data I/O for Bus A, Bit 6
15. I/OA5: Bidirectional Data I/O for Bus A, Bit 5
16. I/OA4: Bidirectional Data I/O for Bus A, Bit 4
17. I/OA3: Bidirectional Data I/O for Bus A, Bit 3
18. I/OA2: Bidirectional Data I/O for Bus A, Bit 2
19. I/OA1: Bidirectional Data I/O for Bus A, Bit 1
20. I/OA0: Bidirectional Data I/O for Bus A, Bit 0
21. GND: Ground
22. DIR: Direction Control Input
23. VCC: Supply Voltage
24. GND: Ground

Functional Features

The 74ACT652SC offers the following functional features:

• Bidirectional data transfer between two separate buses (Bus A and Bus B).
• Individual output enable controls for each bus, allowing selective data flow.
• Direction control input to determine the direction of data transfer.

Advantages and Disadvantages

Advantages

• High-speed performance enables efficient data transfer.
• Wide supply voltage range ensures compatibility with various systems.
• Bidirectional capability simplifies system design and integration.
• Supports both TTL and CMOS voltage levels, enhancing versatility.

Disadvantages

• Limited number of bidirectional buffers (8), which may restrict the scale of data transfer in complex systems.
• Requires careful consideration of timing constraints to avoid data integrity issues.

Working Principles