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SN74HCT645NG4
Product Overview
Category
SN74HCT645NG4 belongs to the category of integrated circuits (ICs).
Use
It is commonly used as a bidirectional octal bus transceiver.
Characteristics
- High-speed CMOS technology
- 8-bit wide bidirectional data transfer
- Non-inverting outputs
- 3-state outputs for bus-oriented applications
- Schmitt-trigger inputs for noise immunity
- Low power consumption
- Wide operating voltage range: 2V to 6V
Package
SN74HCT645NG4 is available in a standard 20-pin DIP (Dual Inline Package) format.
Essence
The essence of SN74HCT645NG4 lies in its ability to facilitate bidirectional data transfer between two buses with different voltage levels.
Packaging/Quantity
SN74HCT645NG4 is typically packaged in tubes or reels, with quantities varying based on customer requirements.
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: 10 ns (max)
- Output Current: ±6 mA
Detailed Pin Configuration
- A1: Data I/O 1
- B1: Data I/O 2
- GND: Ground
- A2: Data I/O 3
- B2: Data I/O 4
- OE*: Output Enable Input
- DIR: Direction Control Input
- VCC: Positive Power Supply
- B3: Data I/O 5
- A3: Data I/O 6
- B4: Data I/O 7
- A4: Data I/O 8
- GND: Ground
- B5: Data I/O 9
- A5: Data I/O 10
- VCC: Positive Power Supply
- B6: Data I/O 11
- A6: Data I/O 12
- B7: Data I/O 13
- A7: Data I/O 14
Functional Features
- Bidirectional data transfer between two buses with different voltage levels
- Non-inverting outputs for direct compatibility with other CMOS devices
- 3-state outputs allow multiple transceivers to share a common bus
- Schmitt-trigger inputs provide noise immunity and improved signal integrity
Advantages and Disadvantages
Advantages
- High-speed data transfer
- Wide operating voltage range
- Low power consumption
- Noise immunity due to Schmitt-trigger inputs
Disadvantages
- Limited number of data I/O pins (14 in total)
- May require additional components for level shifting in certain applications
Working Principles
SN74HCT645NG4 operates by controlling the direction of data flow between two buses using the DIR pin. When DIR is set to logic high, data flows from A-side to B-side, and when DIR is set to logic low, data flows from B-side to A-side. The OE* pin is used to enable or disable the outputs.
Detailed Application Field Plans
SN74HCT645NG4 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
Some alternative models that can be considered as alternatives to SN74HCT645NG4 are: 1. 74HC245: Octal bus transceiver with similar characteristics 2. 74LS245: Octal bus transceiver with TTL compatibility 3. CD74HCT245: High-speed CMOS octal bus transceiver
These alternative models offer similar functionality and can be used as replacements based on specific requirements.
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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng SN74HCT645NG4 trong giải pháp kỹ thuật
Sure! Here are 10 common questions and answers related to the application of SN74HCT645NG4 in technical solutions:
Q: What is SN74HCT645NG4? A: SN74HCT645NG4 is a high-speed octal bus transceiver with 3-state outputs, commonly used for bidirectional data transfer between different voltage levels.
Q: What is the operating voltage range of SN74HCT645NG4? A: The operating voltage range of SN74HCT645NG4 is typically between 4.5V and 5.5V.
Q: Can SN74HCT645NG4 handle level shifting between different voltage domains? A: Yes, SN74HCT645NG4 is designed to handle level shifting between different voltage domains, making it suitable for interfacing between devices operating at different voltages.
Q: How many bidirectional channels does SN74HCT645NG4 have? A: SN74HCT645NG4 has 8 bidirectional channels, allowing for simultaneous data transfer in both directions.
Q: What is the maximum data transfer rate supported by SN74HCT645NG4? A: SN74HCT645NG4 supports high-speed data transfer rates up to 25 MHz.
Q: Can SN74HCT645NG4 be used in applications requiring bus isolation? A: Yes, SN74HCT645NG4 can be used for bus isolation by enabling the 3-state outputs, effectively disconnecting the bus from the rest of the circuit.
Q: Does SN74HCT645NG4 have built-in ESD protection? A: Yes, SN74HCT645NG4 incorporates built-in ESD protection, providing robustness against electrostatic discharge events.
Q: What is the power supply current consumption of SN74HCT645NG4? A: The power supply current consumption of SN74HCT645NG4 depends on the operating conditions but typically ranges from a few milliamperes to tens of milliamperes.
Q: Can SN74HCT645NG4 be used in automotive applications? A: Yes, SN74HCT645NG4 is qualified for automotive applications and meets the necessary standards for automotive electronics.
Q: Are there any application notes or reference designs available for SN74HCT645NG4? A: Yes, Texas Instruments provides application notes and reference designs that can help in understanding and implementing SN74HCT645NG4 in various technical solutions.
Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.