SN74ALS646A-1NT

Product Overview

Category

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

Use

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

Characteristics

• High-speed operation
• Wide operating voltage range
• Bidirectional data flow capability
• Voltage level translation between different logic families

Package

The SN74ALS646A-1NT is available in a 24-pin plastic dual in-line package (PDIP).

Essence

The essence of this product lies in its ability to facilitate efficient data transfer between different logic families, ensuring compatibility and reliable communication.

Packaging/Quantity

The SN74ALS646A-1NT is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Supply voltage: 4.5V to 5.5V
• Input/output voltage range: -0.5V to VCC + 0.5V
• Operating temperature range: -40°C to 85°C
• Propagation delay time: 6 ns (typical)
• Output current: ±24 mA

Detailed Pin Configuration

The SN74ALS646A-1NT has a total of 24 pins, which are assigned specific functions as follows:

1. DIR (Direction Control)
2. OE (Output Enable)
3. A1 (Data Bus A, Bit 1)
4. A2 (Data Bus A, Bit 2)
5. A3 (Data Bus A, Bit 3)
6. A4 (Data Bus A, Bit 4)
7. A5 (Data Bus A, Bit 5)
8. A6 (Data Bus A, Bit 6)
9. A7 (Data Bus A, Bit 7)
10. A8 (Data Bus A, Bit 8)
11. GND (Ground)
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)
21. NC (No Connection)
22. Y1 (Data Bus Y, Bit 1)
23. Y2 (Data Bus Y, Bit 2)
24. Y3 (Data Bus Y, Bit 3)

Functional Features

The SN74ALS646A-1NT offers the following functional features:

• Bidirectional data transfer between Data Bus A and Data Bus B
• Direction control to select the data flow direction
• Output enable control to enable/disable the output buffers
• Voltage level translation between different logic families

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data transfer
• Wide operating voltage range ensures compatibility with various systems
• Bidirectional data flow capability simplifies system design
• Voltage level translation enables communication between different logic families

Disadvantages

• Propagation delay time may limit the maximum achievable data rate
• Limited pin count may restrict the number of data lines that can be accommodated

Working Principles

The SN74ALS646A-1NT operates by receiving data from either Data Bus A or Data Bus B, depending on the direction control input. The received data is then translated to the appropriate voltage levels and transmitted to the output data bus (Data Bus Y). The output enable control allows for enabling or disabling the output buffers, providing flexibility in system operation.

Detailed Application Field Plans

The SN74ALS646A-1NT finds applications in various digital systems, including but not limited to:

1. Microcontrollers and microprocessors
2. Communication systems
3. Data acquisition systems
4. Industrial automation
5. Automotive electronics
6. Consumer electronics

Detailed and Complete Alternative Models

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

These alternative models offer similar functionality and can be considered as substitutes for the SN74ALS646A-1NT, depending on specific requirements and availability.

In conclusion, the SN74ALS646A-1NT is a versatile integrated circuit used for data bus transceivers and voltage level shifting applications. Its high-speed operation, bidirectional data flow capability, and voltage level translation make it suitable for