SN74ALS646A-1DW

Product Overview

Category

The SN74ALS646A-1DW 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
• Non-inverting outputs
• 3-state outputs
• TTL compatibility

Package

The SN74ALS646A-1DW is available in a dual in-line package (DIP) with 20 pins.

Essence

The essence of this product lies in its ability to facilitate the bidirectional transfer of data between two buses with different voltage levels.

Packaging/Quantity

The SN74ALS646A-1DW is typically packaged in tubes or reels, with quantities varying based on customer requirements.

Specifications

• Supply Voltage: 4.5V to 5.5V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 10ns (max)
• Output Current: ±24mA

Detailed Pin Configuration

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

1. A1: Data Bus A, Bit 1
2. A2: Data Bus A, Bit 2
3. A3: Data Bus A, Bit 3
4. A4: Data Bus A, Bit 4
5. A5: Data Bus A, Bit 5
6. A6: Data Bus A, Bit 6
7. A7: Data Bus A, Bit 7
8. A8: Data Bus A, Bit 8
9. GND: Ground
10. OE*: Output Enable Input
11. DIR: Direction Control Input
12. B1: Data Bus B, Bit 1
13. B2: Data Bus B, Bit 2
14. B3: Data Bus B, Bit 3
15. B4: Data Bus B, Bit 4
16. B5: Data Bus B, Bit 5
17. B6: Data Bus B, Bit 6
18. B7: Data Bus B, Bit 7
19. B8: Data Bus B, Bit 8
20. VCC: Supply Voltage

Functional Features

The SN74ALS646A-1DW offers the following functional features:

• Bidirectional data transfer between two buses
• Non-inverting outputs for both data buses
• 3-state outputs for bus isolation
• TTL compatibility ensures easy integration with existing systems

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data transfer
• Wide voltage range enables compatibility with various systems
• Bidirectional data flow simplifies circuit design
• Non-inverting outputs preserve data integrity
• 3-state outputs facilitate bus isolation when needed

Disadvantages

• Limited output current may restrict use in certain applications
• Propagation delay time may impact real-time data transfer requirements

Working Principles

The SN74ALS646A-1DW operates based on the principles of digital logic. It uses a combination of input signals (DIR and OE*) to control the direction of data flow between the two buses (A and B). When DIR is high, data flows from A to B, and when DIR is low, data flows from B to A. The OE* signal enables or disables the outputs, allowing for bus isolation when necessary.

Detailed Application Field Plans

The SN74ALS646A-1DW finds applications in various fields, including:

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

Detailed and Complete Alternative Models

1. SN74ALS645A-1DW
2. SN74ALS647A-1DW
3. SN74ALS648A-1DW
4. SN74ALS649A-1DW
5. SN74ALS640A-1DW

These alternative models offer similar functionality to the SN74ALS646A-1DW and can be considered as alternatives based on specific requirements.

In conclusion, the SN74ALS646A-1DW is a versatile integrated circuit used for bidirectional data bus transceiver applications. Its high-speed operation, wide voltage range, and TTL compatibility make it suitable for various digital electronics projects. However, its limited output current and propagation delay time should be taken into consideration when selecting this IC for specific applications.