SN74ALS646A-1DWRG4

Product Overview

Category

The SN74ALS646A-1DWRG4 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronics for data bus transceivers and voltage level shifting applications.

Characteristics

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

Package

The SN74ALS646A-1DWRG4 is available in a small outline package (SOIC) with 20 pins.

Essence

The essence of this product lies in its ability to facilitate efficient and reliable data transfer between different voltage domains in digital systems.

Packaging/Quantity

The SN74ALS646A-1DWRG4 is typically packaged in reels, containing a quantity of 2500 units per reel.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage Range: -0.5V to VCC + 0.5V
• Output Voltage Range: -0.5V to VCC + 0.5V
• Operating Temperature Range: -40°C to 85°C
• Propagation Delay Time: 7ns (typical)
• Output Current: ±24mA

Detailed Pin Configuration

The SN74ALS646A-1DWRG4 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-1DWRG4 offers the following functional features:

• Bidirectional data transfer between two independent buses (A and B)
• Non-inverting outputs for both bus directions
• 3-state outputs for bus-oriented applications, allowing multiple devices to share a common bus without interference
• High-speed operation enables efficient data transfer in time-critical applications
• Wide operating voltage range allows compatibility with various digital systems

Advantages and Disadvantages

Advantages

• Efficient bidirectional data transfer
• Non-inverting outputs preserve signal integrity
• 3-state outputs enable bus sharing
• Wide operating voltage range enhances compatibility

Disadvantages

• Propagation delay may limit performance in certain high-speed applications
• Limited number of data bits (8 bits) per bus

Working Principles

The SN74ALS646A-1DWRG4 operates based on the principles of voltage level shifting and data bus transceiver functionality. It facilitates bidirectional data transfer between two independent buses (A and B) while maintaining signal integrity and compatibility with different voltage domains. The direction control input (DIR) determines the data flow direction, and the output enable input (OE*) enables or disables the outputs.

Detailed Application Field Plans

The SN74ALS646A-1DWRG4 finds applications in various digital systems where data bus transceivers and voltage level shifting are required. Some specific application fields include:

1. Microcontroller interfacing
2. Memory modules
3. Communication systems
4. Industrial automation
5. Automotive electronics

Detailed and Complete Alternative Models

1. SN74ALS645A-1DWRG4
2. SN74ALS647A-1DWRG4
3. SN74ALS648A-1DWRG4
4. SN74ALS649A-1DWRG4
5. SN74ALS640A-1DWRG4

These alternative models offer similar functionality and characteristics to the SN74ALS646A-1DWRG4, providing options for different design requirements.

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