SN74ALS646A-1DWRE4

Product Overview

Category

The SN74ALS646A-1DWRE4 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
• Schmitt-trigger inputs

Package

The SN74ALS646A-1DWRE4 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 with different voltage levels.

Packaging/Quantity

The SN74ALS646A-1DWRE4 is typically packaged in reels, containing 2500 units per reel.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage Range: -0.5V to VCC + 0.5V
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to 85°C
• Maximum Propagation Delay: 10ns

Detailed Pin Configuration

The SN74ALS646A-1DWRE4 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-1DWRE4 offers the following functional features:

• Bidirectional data transfer between two buses
• Non-inverting outputs for both bus A and bus B
• 3-state outputs for bus B, allowing multiple devices to share the same bus
• Schmitt-trigger inputs for improved noise immunity

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer
• Wide voltage range allows compatibility with various systems
• Bidirectional data flow simplifies circuit design
• Non-inverting outputs preserve signal integrity
• 3-state outputs facilitate bus sharing among multiple devices
• Schmitt-trigger inputs provide robustness against noise

Disadvantages

• Limited number of pins may restrict the number of data lines that can be accommodated
• Requires careful consideration of voltage levels to ensure proper operation

Working Principles

The SN74ALS646A-1DWRE4 operates by controlling the direction of data flow between bus A and bus B using the DIR pin. When DIR is set to logic high, data flows from bus A to bus B, and when DIR is set to logic low, data flows from bus B to bus A. The OE pin is used to enable or disable the outputs.

Detailed Application Field Plans

The SN74ALS646A-1DWRE4 finds applications in various fields, including:

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

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the SN74ALS646A-1DWRE4 include:

1. SN74ALS645A-1DWRE4
2. SN74ALS647A-1DWRE4
3. SN74ALS648A-1DWRE4
4. SN74ALS649A-1DWRE4
5. SN74ALS650A-1DWRE4

These models can be considered as alternatives based on specific requirements and compatibility with existing systems.

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