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SN74HCT645NSR
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SN74HCT645NSR

Product Overview

Category

SN74HCT645NSR 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
  • Schmitt-trigger inputs for noise immunity
  • Bidirectional data transfer capability
  • Non-inverting outputs
  • 3-state outputs for bus-oriented applications

Package

SN74HCT645NSR is available in a surface mount package known as SOIC (Small Outline Integrated Circuit).

Essence

The essence of SN74HCT645NSR lies in its ability to provide bidirectional level shifting and bus transceiver functionality with high-speed operation and noise immunity.

Packaging/Quantity

SN74HCT645NSR is typically packaged in reels containing 2500 units 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
  • Maximum Propagation Delay: 20ns
  • Maximum Input Capacitance: 10pF
  • Maximum Output Capacitance: 15pF

Detailed Pin Configuration

  1. A1 - Data I/O Port A, Bit 1
  2. A2 - Data I/O Port A, Bit 2
  3. A3 - Data I/O Port A, Bit 3
  4. A4 - Data I/O Port A, Bit 4
  5. A5 - Data I/O Port A, Bit 5
  6. A6 - Data I/O Port A, Bit 6
  7. A7 - Data I/O Port A, Bit 7
  8. A8 - Data I/O Port A, Bit 8
  9. GND - Ground
  10. OE - Output Enable
  11. DIR - Direction Control
  12. B1 - Data I/O Port B, Bit 1
  13. B2 - Data I/O Port B, Bit 2
  14. B3 - Data I/O Port B, Bit 3
  15. B4 - Data I/O Port B, Bit 4
  16. B5 - Data I/O Port B, Bit 5
  17. B6 - Data I/O Port B, Bit 6
  18. B7 - Data I/O Port B, Bit 7
  19. B8 - Data I/O Port B, Bit 8
  20. VCC - Supply Voltage

Functional Features

  • Bidirectional data transfer between Port A and Port B
  • Schmitt-trigger inputs for improved noise immunity
  • Non-inverting outputs for direct signal transmission
  • 3-state outputs for bus-oriented applications
  • Output enable and direction control for flexible operation

Advantages and Disadvantages

Advantages

  • High-speed operation
  • Wide operating voltage range
  • Noise immunity due to Schmitt-trigger inputs
  • Bidirectional data transfer capability
  • Suitable for bus transceiver applications

Disadvantages

  • Limited number of data I/O ports (8 bits each)
  • Requires external control signals for direction and output enable

Working Principles

SN74HCT645NSR operates by receiving data from one port and transmitting it to the other port bidirectionally. The direction of data flow is controlled by the DIR pin, while the OE pin enables or disables the output. The IC utilizes CMOS technology for high-speed operation and incorporates Schmitt-trigger inputs for improved noise immunity.

Detailed Application Field Plans

SN74HCT645NSR finds applications 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. SN74HCT646NSR
  2. SN74HCT640NSR
  3. SN74HCT541NSR
  4. SN74HCT573NSR
  5. SN74HCT244NSR

These alternative models offer similar functionality to SN74HCT645NSR and can be considered as alternatives based on specific requirements.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق SN74HCT645NSR في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of SN74HCT645NSR in technical solutions:

  1. Q: What is SN74HCT645NSR? A: SN74HCT645NSR is a high-speed octal bus transceiver with 3-state outputs, commonly used for bidirectional data transfer between different voltage levels.

  2. Q: What is the operating voltage range of SN74HCT645NSR? A: The operating voltage range of SN74HCT645NSR is typically between 4.5V and 5.5V.

  3. Q: Can SN74HCT645NSR be used for level shifting between different voltage domains? A: Yes, SN74HCT645NSR is commonly used for level shifting between different voltage domains due to its bidirectional capability.

  4. Q: How many channels does SN74HCT645NSR have? A: SN74HCT645NSR has 8 bidirectional channels, allowing for simultaneous data transfer in both directions.

  5. Q: What is the maximum data transfer rate supported by SN74HCT645NSR? A: SN74HCT645NSR supports high-speed data transfer rates up to 100 MHz.

  6. Q: Can SN74HCT645NSR handle both TTL and CMOS logic levels? A: Yes, SN74HCT645NSR is compatible with both TTL and CMOS logic levels, making it versatile for various applications.

  7. Q: Does SN74HCT645NSR have built-in protection features? A: Yes, SN74HCT645NSR has built-in ESD protection on all inputs and outputs, ensuring robustness against electrostatic discharge.

  8. Q: Can SN74HCT645NSR be used in bus-oriented systems? A: Absolutely, SN74HCT645NSR is commonly used in bus-oriented systems where multiple devices need to communicate with each other.

  9. Q: What is the power supply current consumption of SN74HCT645NSR? A: The power supply current consumption of SN74HCT645NSR is typically around 8 mA.

  10. Q: Are there any specific layout considerations for using SN74HCT645NSR? A: Yes, it is recommended to follow the layout guidelines provided in the datasheet to minimize noise and ensure proper signal integrity.

Please note that these answers are general and may vary depending on the specific application and requirements. Always refer to the datasheet and consult with an expert for accurate information.