SN74ALS646ANT

Product Overview

• Category: Integrated Circuit
• Use: Data Bus Transceiver
• Characteristics: High-speed, TTL compatible, bidirectional
• Package: 20-pin DIP (Dual In-line Package)
• Essence: Transfers data between two bidirectional buses with different voltage levels
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 4.5V to 5.5V
• Input Voltage Levels: 0V to VCC
• Output Voltage Levels: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6ns (typical)
• Maximum Operating Frequency: 100MHz

Detailed Pin Configuration

1. OE (Output Enable)
2. DIR (Direction Control)
3. A1 (Bus A Data Input/Output)
4. A2 (Bus A Data Input/Output)
5. A3 (Bus A Data Input/Output)
6. A4 (Bus A Data Input/Output)
7. A5 (Bus A Data Input/Output)
8. GND (Ground)
9. B5 (Bus B Data Input/Output)
10. B4 (Bus B Data Input/Output)
11. B3 (Bus B Data Input/Output)
12. B2 (Bus B Data Input/Output)
13. B1 (Bus B Data Input/Output)
14. VCC (Supply Voltage)
15. BDIR (Bus B Direction Control)
16. BOE (Bus B Output Enable)
17. B6 (Bus B Data Input/Output)
18. B7 (Bus B Data Input/Output)
19. B8 (Bus B Data Input/Output)
20. NC (No Connection)

Functional Features

• Bidirectional data transfer between two buses
• TTL compatible inputs and outputs
• High-speed operation
• Output enable and direction control for flexible bus management

Advantages

• Supports bidirectional communication between buses with different voltage levels
• Wide operating temperature range allows usage in various environments
• High-speed operation enables efficient data transfer
• Flexible bus management through output enable and direction control pins

Disadvantages

• Limited number of data input/output pins (8 per bus)
• Not suitable for applications requiring higher data rates above 100MHz

Working Principles

The SN74ALS646ANT is a data bus transceiver that facilitates bidirectional data transfer between two buses, typically with different voltage levels. The direction of data flow is controlled by the DIR pin, while the OE pin enables or disables the output. When the DIR pin is set to logic high, data flows from Bus A to Bus B, and when it is set to logic low, data flows from Bus B to Bus A. The TTL compatible inputs and outputs ensure compatibility with a wide range of digital systems.

Detailed Application Field Plans

1. Industrial Automation: The SN74ALS646ANT can be used in industrial automation systems where multiple buses with different voltage levels need to communicate bidirectionally. It enables seamless data transfer between these buses, facilitating efficient control and monitoring of various processes.

2. Automotive Electronics: In automotive electronics, different subsystems often operate at different voltage levels. The SN74ALS646ANT can be employed to establish communication between these subsystems, allowing them to exchange data and coordinate their functions effectively.

3. Telecommunications: The transceiver can be utilized in telecommunications equipment to interface between different communication protocols or voltage domains. It enables smooth data transfer between these domains, ensuring reliable and efficient communication.

4. Consumer Electronics: The SN74ALS646ANT can be integrated into consumer electronic devices that require bidirectional data transfer between different subsystems. It enables seamless communication between these subsystems, enhancing the overall functionality and performance of the device.

Detailed and Complete Alternative Models

1. SN74ALS646A: Similar to SN74ALS646ANT, but with a different package (TSSOP-20)
2. SN74ALS648A: Octal bus transceiver with similar features, but with additional control pins for individual direction control
3. SN74ALS640A: Octal bus transceiver with similar features, but without output enable pin

These alternative models provide similar functionality and can be considered as substitutes depending on specific requirements and constraints.

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