74HCT646DB,118

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Bus Transceiver
• Characteristics: High-speed, CMOS technology, 3-state output, voltage level translation
• Package: SSOP-24
• Essence: Bi-directional octal bus transceiver with 3-state outputs
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2.0V to 6.0V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +125°C
• Input Capacitance: 3.5pF
• Output Capacitance: 6pF
• Propagation Delay Time: 10ns
• Maximum Operating Frequency: 80MHz

Detailed Pin Configuration

The 74HCT646DB,118 IC has a total of 24 pins. The pin configuration is as follows:

1. OE (Output Enable) 1
2. A1 (Address Input) 1
3. A2 (Address Input) 2
4. A3 (Address Input) 3
5. A4 (Address Input) 4
6. A5 (Address Input) 5
7. A6 (Address Input) 6
8. A7 (Address Input) 7
9. GND (Ground)
10. B1 (Data Bus) 1
11. B2 (Data Bus) 2
12. B3 (Data Bus) 3
13. B4 (Data Bus) 4
14. B5 (Data Bus) 5
15. B6 (Data Bus) 6
16. B7 (Data Bus) 7
17. B8 (Data Bus) 8
18. VCC (Supply Voltage)
19. DIR (Direction Control)
20. OE (Output Enable) 2
21. A8 (Address Input) 8
22. B8 (Data Bus) 8
23. GND (Ground)
24. VCC (Supply Voltage)

Functional Features

• Bi-directional data transfer between two independent buses
• 3-state outputs for bus isolation
• Voltage level translation between different logic families
• High-speed operation suitable for various applications
• CMOS technology for low power consumption

Advantages and Disadvantages

Advantages: - Allows bidirectional communication between two buses - Provides bus isolation with 3-state outputs - Supports voltage level translation - Low power consumption due to CMOS technology

Disadvantages: - Limited maximum operating frequency compared to some other ICs - Requires careful consideration of input and output voltage levels

Working Principles

The 74HCT646DB,118 is designed to facilitate bidirectional data transfer between two independent buses. It utilizes a direction control pin (DIR) to determine the data flow direction. When DIR is set to high, data is transferred from bus A to bus B, and when DIR is set to low, data is transferred from bus B to bus A.

The IC also features an output enable pin (OE) for enabling or disabling the outputs. When OE is high, the outputs are in a high-impedance state (3-state), allowing bus isolation.

Additionally, the 74HCT646DB,118 supports voltage level translation, making it compatible with different logic families. It operates on a supply voltage range of 2.0V to 6.0V and can handle input and output voltages within this range.

Detailed Application Field Plans

The 74HCT646DB,118 is commonly used in various applications that require bidirectional data transfer and voltage level translation. Some of the typical application fields include:

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

Detailed and Complete Alternative Models

• SN74HCT646DW: SOIC-24 package, similar specifications and features
• 74HC646N: DIP-24 package, similar functionality but operates at a lower voltage range
• CD74HCT646E: PDIP-24 package, comparable performance and characteristics

These alternative models provide similar functionality to the 74HCT646DB,118 and can be considered as replacements depending on specific requirements.

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