SN74HCT645DW

Product Overview

Category

SN74HCT645DW belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

• High-speed CMOS technology
• Wide operating voltage range: 2V to 6V
• 3-state outputs for bus-oriented applications
• Non-inverting outputs
• Schmitt-trigger action on all inputs
• ESD protection exceeds JESD 22

Package

SN74HCT645DW is available in a standard SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of SN74HCT645DW lies in its ability to provide bidirectional level shifting and bus transceiver functionality.

Packaging/Quantity

SN74HCT645DW is typically packaged in reels, with each reel containing a specific quantity of ICs. The exact quantity may vary depending on the manufacturer's specifications.

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
• Number of Pins: 20
• Logic Family: HCT

Detailed Pin Configuration

1. A1 - Input/Output Port A, Bit 1
2. OE - Output Enable Input
3. A2 - Input/Output Port A, Bit 2
4. GND - Ground
5. A3 - Input/Output Port A, Bit 3
6. A4 - Input/Output Port A, Bit 4
7. A5 - Input/Output Port A, Bit 5
8. VCC - Positive Power Supply
9. B5 - Input/Output Port B, Bit 5
10. B4 - Input/Output Port B, Bit 4
11. B3 - Input/Output Port B, Bit 3
12. B2 - Input/Output Port B, Bit 2
13. B1 - Input/Output Port B, Bit 1
14. DIR - Direction Control Input
15. GND - Ground
16. B6 - Input/Output Port B, Bit 6
17. B7 - Input/Output Port B, Bit 7
18. A7 - Input/Output Port A, Bit 7
19. A6 - Input/Output Port A, Bit 6
20. VCC - Positive Power Supply

Functional Features

• Bidirectional level shifting between Port A and Port B
• 3-state outputs for bus-oriented applications
• Non-inverting outputs ensure signal integrity
• Schmitt-trigger action on all inputs provides noise immunity
• Output enable input (OE) allows control over the direction of data flow
• ESD protection exceeds industry standards, ensuring robustness against electrostatic discharge

Advantages and Disadvantages

Advantages

• High-speed CMOS technology enables fast data transmission
• Wide operating voltage range allows compatibility with various systems
• 3-state outputs facilitate bus sharing and reduce conflicts
• Schmitt-trigger action enhances noise immunity

Disadvantages

• Limited number of bidirectional ports (Port A and Port B)
• May require additional components for specific applications

Working Principles

SN74HCT645DW operates by receiving input signals from Port A and Port B and performing bidirectional level shifting based on the direction control input (DIR). The output enable input (OE) determines whether the outputs are active or in a high-impedance state. The IC utilizes high-speed CMOS technology and Schmitt-trigger action to ensure reliable data transmission and noise immunity.

Detailed Application Field Plans

SN74HCT645DW finds applications in various fields, including but not limited to: - Microcontroller interfacing - Data communication systems - Industrial automation - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

1. SN74HCT646DW: Similar to SN74HCT645DW, but with inverted outputs.
2. SN74HCT640DW: Octal bus transceiver with non-inverting 3-state outputs.
3. SN74HCT541DW: Octal buffer/line driver with 3-state outputs.

These alternative models offer similar functionality and can be used as substitutes for SN74HCT645DW depending on specific requirements.

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