74HC646D,652

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Data Bus Transceiver
• Characteristics: High-speed, Low-power, TTL-Compatible
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Bidirectional Octal Bus Transceiver with 3-State Outputs
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 8 ns (max)
• Output Current: ±6 mA
• Input Capacitance: 4.5 pF (typ)
• Output Capacitance: 8 pF (typ)

Detailed Pin Configuration

1. OE (Output Enable) - Active LOW output enable input
2. DIR (Direction Control) - Direction control input
3. A0-A7 (Data Bus) - Bidirectional data bus lines
4. B0-B7 (Data Bus) - Bidirectional data bus lines
5. GND (Ground) - Ground reference
6. VCC (Supply Voltage) - Positive supply voltage
7. NC (No Connection) - No connection
8. NC (No Connection) - No connection
9. NC (No Connection) - No connection
10. NC (No Connection) - No connection
11. NC (No Connection) - No connection
12. NC (No Connection) - No connection
13. NC (No Connection) - No connection
14. NC (No Connection) - No connection
15. NC (No Connection) - No connection
16. NC (No Connection) - No connection
17. NC (No Connection) - No connection
18. NC (No Connection) - No connection
19. NC (No Connection) - No connection
20. VCC (Supply Voltage) - Positive supply voltage
21. OE (Output Enable) - Active LOW output enable input
22. DIR (Direction Control) - Direction control input
23. B7 (Data Bus) - Bidirectional data bus line
24. B6 (Data Bus) - Bidirectional data bus line
25. B5 (Data Bus) - Bidirectional data bus line
26. B4 (Data Bus) - Bidirectional data bus line
27. B3 (Data Bus) - Bidirectional data bus line
28. B2 (Data Bus) - Bidirectional data bus line
29. B1 (Data Bus) - Bidirectional data bus line
30. B0 (Data Bus) - Bidirectional data bus line
31. A7 (Data Bus) - Bidirectional data bus line
32. A6 (Data Bus) - Bidirectional data bus line
33. A5 (Data Bus) - Bidirectional data bus line
34. A4 (Data Bus) - Bidirectional data bus line
35. A3 (Data Bus) - Bidirectional data bus line
36. A2 (Data Bus) - Bidirectional data bus line
37. A1 (Data Bus) - Bidirectional data bus line
38. A0 (Data Bus) - Bidirectional data bus line
39. GND (Ground) - Ground reference

Functional Features

• Bidirectional data transfer between two independent buses
• 3-state outputs for bus isolation
• TTL-compatible inputs and outputs
• High-speed operation with low power consumption
• Output enable and direction control for flexible data flow management

Advantages

• Allows efficient communication between different bus systems
• Provides bus isolation for enhanced system reliability
• Supports high-speed data transfer with minimal power consumption
• Compatible with TTL logic levels, ensuring easy integration into existing designs

Disadvantages

• Limited number of data bus lines (8 in total)
• Requires careful handling and static discharge precautions due to its integrated circuit nature

Working Principles

The 74HC646D,652 is a bidirectional octal bus transceiver that enables data transfer between two independent buses. It features 3-state outputs, which allow the device to be effectively isolated from the bus when necessary. The direction control input determines the data flow direction, while the output enable input activates or deactivates the outputs. The IC operates at high speeds while consuming low power, making it suitable for various applications.

Detailed Application Field Plans

The 74HC646D,652 can be used in a wide range of applications, including: 1. Data communication systems 2. Microprocessor-based systems 3. Industrial automation 4. Networking equipment 5. Automotive electronics 6. Test and measurement instruments

Detailed and Complete Alternative Models

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