SN74ACT245N

Product Overview

Category: Integrated Circuit (IC)

Use: The SN74ACT245N is a bidirectional octal bus transceiver designed for asynchronous communication between two buses. It allows data transfer in both directions, making it suitable for various applications that require bidirectional data flow.

Characteristics: - High-speed operation - Wide voltage range - Low power consumption - Schmitt-trigger inputs for noise immunity - 3-state outputs for bus isolation

Package: The SN74ACT245N is available in a 20-pin DIP (Dual In-line Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: The essence of the SN74ACT245N lies in its ability to facilitate efficient and reliable bidirectional data transfer between two buses.

Packaging/Quantity: The SN74ACT245N is typically sold in reels or tubes, with quantities varying depending on the supplier.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6ns (max)
• Output Current: ±24mA

Detailed Pin Configuration

The SN74ACT245N has a total of 20 pins, which are assigned specific functions as follows:

1. DIR (Direction Control)
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. A8 (Data Bus A, Bit 8)
10. GND (Ground)
11. B8 (Data Bus B, Bit 8)
12. B7 (Data Bus B, Bit 7)
13. B6 (Data Bus B, Bit 6)
14. B5 (Data Bus B, Bit 5)
15. B4 (Data Bus B, Bit 4)
16. B3 (Data Bus B, Bit 3)
17. B2 (Data Bus B, Bit 2)
18. B1 (Data Bus B, Bit 1)
19. OE (Output Enable)
20. VCC (Supply Voltage)

Functional Features

• Bidirectional data transfer between two buses
• Direction control for selecting the data flow direction
• 3-state outputs for bus isolation
• Schmitt-trigger inputs for noise immunity
• High-speed operation for efficient data transfer

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick data transfer - Wide voltage range enables compatibility with various systems - Low power consumption for energy efficiency - Schmitt-trigger inputs provide noise immunity, ensuring reliable data transmission - 3-state outputs allow for bus isolation, enhancing system flexibility

Disadvantages: - Limited number of bidirectional channels (8 in total) - Requires careful consideration of timing and synchronization in complex systems

Working Principles

The SN74ACT245N operates based on the principles of digital logic. It uses a combination of transistors, gates, and flip-flops to enable bidirectional data transfer between two buses. The direction control pin determines the flow of data, while the 3-state outputs allow for bus isolation when necessary.

Detailed Application Field Plans

The SN74ACT245N finds applications in various fields, including but not limited to: - Microprocessor systems - Data communication networks - Industrial automation - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

1. SN74ACT245: Similar to SN74ACT245N, but available in a different package (e.g., TSSOP)
2. 74HC245: A compatible alternative from a different manufacturer (e.g., NXP Semiconductors)
3. CD74HCT245: Another bidirectional bus transceiver with similar functionality

These alternative models offer similar features and can be used as substitutes for the SN74ACT245N depending on specific requirements.

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