SN74ALS646A-1DWR

Product Overview

Category

The SN74ALS646A-1DWR belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronics for data bus transceiver applications.

Characteristics

• High-speed operation
• Wide voltage range
• Bidirectional data flow capability
• Non-inverting outputs
• 3-state outputs for bus-oriented applications

Package

The SN74ALS646A-1DWR is available in a small-outline package (SOIC) with 20 pins.

Essence

The essence of this product lies in its ability to facilitate the bidirectional transfer of data between two buses, making it an essential component in various digital communication systems.

Packaging/Quantity

The SN74ALS646A-1DWR is typically packaged in reels or tubes, with each reel containing 2500 units.

Specifications

• Supply Voltage: 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
• Maximum Propagation Delay: 10ns

Detailed Pin Configuration

The SN74ALS646A-1DWR has a total of 20 pins, which are assigned specific functions as follows:

1. DIR (Direction Control)
2. OE (Output Enable)
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. DIR (Direction Control)
16. OE (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

The SN74ALS646A-1DWR offers the following functional features:

• Bidirectional data transfer between two buses (A and B)
• Non-inverting outputs for accurate signal transmission
• 3-state outputs for bus-oriented applications, allowing multiple devices to share a common bus without interference

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer
• Wide voltage range allows compatibility with various systems
• Bidirectional data flow capability simplifies circuit design
• Non-inverting outputs ensure signal integrity
• 3-state outputs facilitate bus sharing in complex systems

Disadvantages

• Limited pin count may restrict the number of data lines that can be accommodated
• Requires careful consideration of direction control and output enable signals for proper operation

Working Principles

The SN74ALS646A-1DWR operates based on the principles of digital logic. It uses internal circuitry to control the bidirectional flow of data between two buses. The direction control (DIR) pin determines the data flow direction, while the output enable (OE) pin enables or disables the outputs. By appropriately configuring these control signals, data can be transferred from Bus A to Bus B or vice versa.

Detailed Application Field Plans

The SN74ALS646A-1DWR finds application in various fields, including:

1. Data communication systems
2. Microprocessor-based systems
3. Industrial automation
4. Automotive electronics
5. Telecommunications equipment

In data communication systems, this IC enables efficient data transfer between different subsystems. In microprocessor-based systems, it facilitates communication between the processor and peripheral devices. In industrial automation and automotive electronics, it helps in transmitting control signals and data between different components. In telecommunications equipment, it plays a crucial role in data routing and switching.

Detailed and Complete Alternative Models

There are several alternative models available that offer similar functionality to the SN74ALS646A-1DWR. Some notable alternatives include:

1. SN74ALS645A-1DWR
2. SN74ALS647A-1DWR
3. SN74ALS648A-1DWR
4. SN74ALS649A-1DWR

These alternative models provide comparable features and can be used as substitutes depending on specific requirements and availability.

In conclusion, the SN74ALS646A-1DWR is a versatile integrated circuit designed for bidirectional data bus transceiver applications. Its high-speed operation, wide voltage