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Encyclopedia Entry: 74AC821SCX
Product Overview
Category
The 74AC821SCX belongs to the category of integrated circuits (ICs).
Use
This IC is commonly used in digital electronic systems for various applications, including data processing, signal transmission, and logic operations.
Characteristics
- The 74AC821SCX is a high-speed, low-power, 10-bit D-type flip-flop with 3-state outputs.
- It operates on a wide voltage range, typically between 2V and 6V.
- This IC offers excellent noise immunity and high-speed performance, making it suitable for demanding digital applications.
- It features a compact design, allowing for space-efficient integration into electronic circuits.
Package and Quantity
The 74AC821SCX is available in a small outline package (SOIC) with 20 pins. It is typically sold in reels or tubes containing multiple units.
Specifications
- Supply Voltage Range: 2V to 6V
- High-Level Input Voltage: 2V to VCC
- Low-Level Input Voltage: GND to 0.8V
- Output Current: ±24mA
- Operating Temperature Range: -40°C to +85°C
Pin Configuration
The detailed pin configuration of the 74AC821SCX is as follows:
```
| | | PIN CONFIGURATION | | | | _______ _______ | | | | | | | | Q1 |1 20| VCC | GND | | | | | | | | | Q0 |2 19| CLR | CLK | | | | | | | | | Q2 |3 18| D10 | D9 | | | | | | | | | Q3 |4 17| D8 | D7 | | | | | | | | | Q4 |5 16| D6 | D5 | | | | | | | | | Q5 |6 15| D4 | D3 | | | | | | | | | Q6 |7 14| D2 | D1 | | | | | | | | | Q7 |8 13| D0 | OE | | | | | | | | | GND|9 12| NC | Qn | | |______|_______|_______|_______| |
```
Functional Features
- The 74AC821SCX incorporates 10 D-type flip-flops with 3-state outputs.
- It provides synchronous operation, allowing for precise control of data transfer.
- The IC offers a clear (CLR) input to reset the flip-flop outputs to a known state.
- It includes an enable (OE) input to activate or disable the outputs.
- The 74AC821SCX features a clock (CLK) input for synchronized data storage.
Advantages and Disadvantages
Advantages: - High-speed performance enables efficient data processing. - Low power consumption contributes to energy efficiency. - Compact design allows for space-saving integration into electronic systems. - Wide voltage range enhances versatility in various applications.
Disadvantages: - Limited number of flip-flops (10 in this case) may restrict certain complex applications. - Sensitive to electrostatic discharge (ESD), requiring proper handling during installation.
Working Principles
The 74AC821SCX operates based on the principles of digital logic. It utilizes D-type flip-flops to store and transfer binary data. The synchronous operation ensures that data is transferred precisely at the rising edge of the clock signal. The enable input allows for control over the activation or deactivation of the outputs. The clear input resets the flip-flop outputs to a known state when triggered.
Application Field Plans
The 74AC821SCX finds application in various digital electronic systems, including but not limited to: - Microprocessors and microcontrollers - Data communication systems - Memory modules - Industrial automation equipment - Consumer electronics
Alternative Models
For similar functionality, the following alternative models can be considered: - 74HC821: High-speed CMOS logic IC with 3-state outputs - 74LS821: Low-power Schottky TTL IC with 3-state outputs -
Перечислите 10 распространенных вопросов и ответов, связанных с применением 74AC821SCX в технических решениях.
Sure! Here are 10 common questions and answers related to the application of 74AC821SCX in technical solutions:
Q: What is the purpose of the 74AC821SCX integrated circuit? A: The 74AC821SCX is a 10-bit D-type flip-flop with 3-state outputs, used for storing and transferring digital data.
Q: What is the maximum operating voltage for the 74AC821SCX? A: The maximum operating voltage for the 74AC821SCX is typically 5.5 volts.
Q: Can the 74AC821SCX be used in high-speed applications? A: Yes, the 74AC821SCX is designed for high-speed operation and can be used in applications requiring fast data transfer.
Q: How many flip-flops are there in the 74AC821SCX? A: The 74AC821SCX contains 10 individual flip-flops, allowing it to store and manipulate 10 bits of data.
Q: What is the output current capability of the 74AC821SCX? A: The 74AC821SCX has a typical output current capability of 24 mA, making it suitable for driving standard logic levels.
Q: Can the 74AC821SCX be cascaded to create larger registers? A: Yes, multiple 74AC821SCX ICs can be cascaded together to create larger registers or shift registers.
Q: Does the 74AC821SCX have any built-in protection features? A: The 74AC821SCX does not have built-in protection features, so external measures may be required to protect against ESD or overvoltage.
Q: What is the power supply voltage range for the 74AC821SCX? A: The recommended power supply voltage range for the 74AC821SCX is typically between 2.0 and 5.5 volts.
Q: Can the 74AC821SCX be used in both TTL and CMOS logic systems? A: Yes, the 74AC821SCX is compatible with both TTL and CMOS logic levels, making it versatile for various applications.
Q: Are there any specific timing requirements for clock signals when using the 74AC821SCX? A: The 74AC821SCX has specific setup and hold time requirements for clock signals, which should be followed to ensure proper operation.
Please note that these answers are general and may vary depending on the specific application and datasheet of the 74AC821SCX.