SN74ABT646NT

Product Overview

• Category: Integrated Circuit
• Use: Bus Transceiver and Register
• Characteristics: High-speed, low-power, bidirectional transceiver with 3-state outputs
• Package: 24-pin DIP (Dual In-line Package)
• Essence: Converts data between two bidirectional buses
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6.5ns (Max)
• Output Current: ±12mA
• Input Capacitance: 4pF
• Output Capacitance: 8pF

Pin Configuration

The SN74ABT646NT has a total of 24 pins. The pin configuration is as follows:

1. OE (Output Enable) A
2. I/O0A (Bidirectional Data I/O) A
3. I/O1A (Bidirectional Data I/O) A
4. GND (Ground)
5. I/O2A (Bidirectional Data I/O) A
6. I/O3A (Bidirectional Data I/O) A
7. VCC (Supply Voltage)
8. I/O4A (Bidirectional Data I/O) A
9. I/O5A (Bidirectional Data I/O) A
10. I/O6A (Bidirectional Data I/O) A
11. I/O7A (Bidirectional Data I/O) A
12. DIR (Direction Control)
13. I/O7B (Bidirectional Data I/O) B
14. I/O6B (Bidirectional Data I/O) B
15. I/O5B (Bidirectional Data I/O) B
16. I/O4B (Bidirectional Data I/O) B
17. VCC (Supply Voltage)
18. I/O3B (Bidirectional Data I/O) B
19. I/O2B (Bidirectional Data I/O) B
20. GND (Ground)
21. I/O1B (Bidirectional Data I/O) B
22. I/O0B (Bidirectional Data I/O) B
23. OE (Output Enable) B
24. DIR (Direction Control)

Functional Features

• Bidirectional data transfer between two buses
• 3-state outputs for bus isolation
• Output enable and direction control for flexible operation
• High-speed operation with minimal propagation delay

Advantages and Disadvantages

Advantages: - High-speed data transfer - Low power consumption - Flexible control options

Disadvantages: - Limited number of bidirectional data lines - Requires external control signals for proper operation

Working Principles

The SN74ABT646NT is designed to convert data between two bidirectional buses. It operates based on the input signals received through the direction control pin (DIR). When DIR is set to logic high, data is transferred from Bus A to Bus B. Conversely, when DIR is set to logic low, data is transferred from Bus B to Bus A. The output enable pins (OE) are used to enable or disable the outputs, allowing for bus isolation when needed.

Detailed Application Field Plans

The SN74ABT646NT can be used in various applications that require bidirectional data transfer between two buses. Some potential application fields include:

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

Detailed and Complete Alternative Models

1. SN74ABT646DWR - 24-pin SOIC (Small Outline Integrated Circuit) package
2. SN74ABT646PW - 24-pin TSSOP (Thin Shrink Small Outline Package) package
3. SN74ABT646ADB - 24-pin SSOP (Shrink Small Outline Package) package

These alternative models offer similar functionality to the SN74ABT646NT but come in different package options, providing flexibility for different application requirements.

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