SN74HCT646DW

Product Overview

Category

SN74HCT646DW belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for signal level shifting and bus interfacing applications.

Characteristics

• High-speed operation
• Wide voltage range
• Schmitt-trigger inputs
• 3-state outputs

Package

SN74HCT646DW is available in a standard SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of SN74HCT646DW lies in its ability to facilitate bidirectional voltage level translation between different logic families.

Packaging/Quantity

SN74HCT646DW is typically packaged in reels or tubes, with quantities varying depending on the supplier.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HCT
• Number of Channels: 8
• Input/Output Type: Tri-State
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 15ns (max)
• Output Current: ±6mA

Detailed Pin Configuration

1. OE (Output Enable)
2. A1 (Channel Select)
3. A2 (Channel Select)
4. A3 (Channel Select)
5. A4 (Channel Select)
6. GND (Ground)
7. B1 (Channel Select)
8. B2 (Channel Select)
9. B3 (Channel Select)
10. B4 (Channel Select)
11. VCC (Supply Voltage)
12. B5 (Channel Select)
13. B6 (Channel Select)
14. B7 (Channel Select)
15. B8 (Channel Select)
16. DIR (Direction Control)
17. I/O1 (Bidirectional I/O)
18. I/O2 (Bidirectional I/O)
19. I/O3 (Bidirectional I/O)
20. I/O4 (Bidirectional I/O)
21. I/O5 (Bidirectional I/O)
22. I/O6 (Bidirectional I/O)
23. I/O7 (Bidirectional I/O)
24. I/O8 (Bidirectional I/O)

Functional Features

• Bidirectional voltage level translation
• 3-state outputs for bus interfacing
• Schmitt-trigger inputs for noise immunity
• Output enable control for flexible operation

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data transfer.
• Wide voltage range enables compatibility with various logic families.
• Schmitt-trigger inputs provide robustness against noise.

Disadvantages

• Limited number of channels may restrict certain applications.
• Propagation delay time may affect real-time systems.

Working Principles

SN74HCT646DW operates by receiving input signals from one logic family and translating them to the appropriate voltage levels required by another logic family. The direction of translation is controlled by the DIR pin. When the DIR pin is set to a specific logic level, the corresponding bidirectional I/O pins allow data to flow in that direction.

Detailed Application Field Plans

SN74HCT646DW finds application in various fields, including:

1. Microcontroller interfacing
2. Data communication systems
3. Industrial automation
4. Automotive electronics
5. Consumer electronics

Detailed and Complete Alternative Models

1. SN74HCT645DW
2. SN74HCT647DW
3. SN74HCT648DW
4. SN74HCT649DW
5. SN74HCT640DW

These alternative models offer similar functionality and can be used as substitutes for SN74HCT646DW depending on specific requirements.

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