SN74HCT646NT

Product Overview

Category

SN74HCT646NT 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 CMOS technology
• Compatible with TTL inputs
• Wide operating voltage range: 2V to 6V
• Schmitt-trigger action on all inputs
• Non-inverting outputs
• 3-state outputs

Package

SN74HCT646NT is available in a standard 20-pin TSSOP (Thin Shrink Small Outline Package) package.

Essence

The essence of SN74HCT646NT lies in its ability to provide bidirectional voltage level shifting between two different logic levels, making it ideal for interfacing between devices operating at different voltage levels.

Packaging/Quantity

SN74HCT646NT is typically packaged in reels containing 2500 units.

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: 12ns (max)
• Output Current: ±6mA

Detailed Pin Configuration

1. OE (Output Enable)
2. A1 (Input/Output)
3. A2 (Input/Output)
4. A3 (Input/Output)
5. A4 (Input/Output)
6. A5 (Input/Output)
7. A6 (Input/Output)
8. GND (Ground)
9. B1 (Input/Output)
10. B2 (Input/Output)
11. B3 (Input/Output)
12. B4 (Input/Output)
13. B5 (Input/Output)
14. B6 (Input/Output)
15. VCC (Supply Voltage)
16. DIR (Direction Control)
17. OE (Output Enable)
18. O1 (Output)
19. O2 (Output)
20. GND (Ground)

Functional Features

• Bidirectional voltage level shifting
• Non-inverting outputs
• Schmitt-trigger action on all inputs
• 3-state outputs for bus interfacing

Advantages and Disadvantages

Advantages

• High-speed CMOS technology allows for fast operation
• Compatibility with TTL inputs simplifies integration with existing systems
• Wide operating voltage range provides flexibility in various applications
• Schmitt-trigger action ensures noise immunity and signal integrity

Disadvantages

• Limited output current may restrict usage in certain high-current applications
• TSSOP package may require careful handling during assembly

Working Principles

SN74HCT646NT operates by receiving input signals from one logic level and converting them to the desired logic level on the output side. The direction of the conversion is controlled by the DIR pin. When the DIR pin is set to a specific logic level, the IC will shift the voltage levels bidirectionally between the A and B sides accordingly.

Detailed Application Field Plans

SN74HCT646NT finds extensive use in various applications, including but not limited to: - Interfacing between microcontrollers operating at different voltage levels - Level shifting in communication protocols such as I2C, SPI, and UART - Bus interfacing in data acquisition systems - Signal level translation in industrial automation

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to SN74HCT646NT are: - SN74HCT245N - SN74HCT541N - SN74HCT573N - SN74HCT125N

These alternatives can be considered based on specific requirements and availability.

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