SN74HC646NT

Product Overview

• Category: Integrated Circuit
• Use: Data Bus Transceiver
• Characteristics: High-speed, Non-inverting, 3-state
• Package: DIP (Dual In-line Package)
• Essence: Transceiver IC for bidirectional data transfer
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC
• Number of Channels: 8
• Input/Output Type: TTL Compatible
• Maximum Data Rate: 80 Mbps
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. OE (Output Enable) - Active Low Output Enable
2. DIR (Direction Control) - Controls the direction of data flow
3. A0-A7 (Data Bus) - Bidirectional data lines
4. B0-B7 (Data Bus) - Bidirectional data lines
5. VCC (Supply Voltage) - Positive power supply
6. GND (Ground) - Ground reference
7. NC (No Connection) - Not connected pin
8. GND (Ground) - Ground reference
9. B7 (Data Bus) - Bidirectional data line
10. B6 (Data Bus) - Bidirectional data line
11. B5 (Data Bus) - Bidirectional data line
12. B4 (Data Bus) - Bidirectional data line
13. B3 (Data Bus) - Bidirectional data line
14. B2 (Data Bus) - Bidirectional data line
15. B1 (Data Bus) - Bidirectional data line
16. B0 (Data Bus) - Bidirectional data line
17. A7 (Data Bus) - Bidirectional data line
18. A6 (Data Bus) - Bidirectional data line
19. A5 (Data Bus) - Bidirectional data line
20. A4 (Data Bus) - Bidirectional data line
21. A3 (Data Bus) - Bidirectional data line
22. A2 (Data Bus) - Bidirectional data line
23. A1 (Data Bus) - Bidirectional data line
24. A0 (Data Bus) - Bidirectional data line
25. GND (Ground) - Ground reference
26. VCC (Supply Voltage) - Positive power supply
27. DIR (Direction Control) - Controls the direction of data flow
28. OE (Output Enable) - Active Low Output Enable

Functional Features

• Bidirectional data transfer between two data buses
• Non-inverting logic for compatibility with TTL levels
• High-speed operation for efficient data transmission
• 3-state outputs for bus isolation when not enabled
• Output enable and direction control for flexible data flow management

Advantages and Disadvantages

Advantages

• High-speed data transfer capability
• Non-inverting logic ensures compatibility with TTL levels
• Flexible data flow management with output enable and direction control
• 3-state outputs allow for bus isolation

Disadvantages

• Limited to 8 channels of bidirectional data transfer
• Requires external control signals for direction and output enable

Working Principles

The SN74HC646NT is a bidirectional data bus transceiver that allows for the transfer of data between two separate data buses. It operates using non-inverting logic, ensuring compatibility with TTL levels. The direction of data flow is controlled by the DIR pin, while the OE pin enables or disables the outputs.

When the OE pin is low, the outputs are active, allowing data to be transferred between the A and B buses based on the state of the DIR pin. When the OE pin is high, the outputs are disabled, effectively isolating the A and B buses.

Detailed Application Field Plans

The SN74HC646NT is commonly used in various applications that require bidirectional data transfer between two separate data buses. Some of the typical application fields include:

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

Detailed and Complete Alternative Models

• SN74HC245N: Octal Bus Transceiver with 3-state Outputs
• SN74HCT646DW: Octal Bus Transceiver with 3-state Outputs and Schmitt-trigger Inputs
• SN74LVC646APW: Octal Bus Transceiver with 3-state Outputs and 5V Tolerant Inputs
• SN74LVTH646PW: Octal Bus Transceiver with 3-state Outputs and 5V Tolerant Inputs

These alternative models offer similar functionality to the SN74HC646NT and can be considered as alternatives based on specific requirements and compatibility needs.

In conclusion, the SN74HC646NT is a high-speed bidirectional data bus transceiver IC