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SN74AS821ADWR
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SN74AS821ADWR

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Logic Gates
  • Characteristics: High-speed, low-power consumption
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: 8-bit D-type flip-flop with 3-state outputs
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 4.5V to 5.5V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay Time: 6ns (typical)
  • Output Drive Capability: ±24mA

Detailed Pin Configuration

The SN74AS821ADWR has a total of 20 pins, which are arranged as follows:

  1. CLR (Clear) - Active Low Clear Input
  2. D0 (Data Input 0) - Data Input Bit 0
  3. D1 (Data Input 1) - Data Input Bit 1
  4. D2 (Data Input 2) - Data Input Bit 2
  5. D3 (Data Input 3) - Data Input Bit 3
  6. D4 (Data Input 4) - Data Input Bit 4
  7. D5 (Data Input 5) - Data Input Bit 5
  8. D6 (Data Input 6) - Data Input Bit 6
  9. D7 (Data Input 7) - Data Input Bit 7
  10. GND (Ground) - Ground Connection
  11. Q0 (Output 0) - Output Bit 0
  12. Q1 (Output 1) - Output Bit 1
  13. Q2 (Output 2) - Output Bit 2
  14. Q3 (Output 3) - Output Bit 3
  15. Q4 (Output 4) - Output Bit 4
  16. Q5 (Output 5) - Output Bit 5
  17. Q6 (Output 6) - Output Bit 6
  18. Q7 (Output 7) - Output Bit 7
  19. OE (Output Enable) - Output Enable Input
  20. VCC (Power Supply) - Power Supply Connection

Functional Features

The SN74AS821ADWR is an 8-bit D-type flip-flop with 3-state outputs. It features a clear input (CLR) for resetting the flip-flop, and an output enable input (OE) for enabling or disabling the outputs. The device operates at high speed while consuming low power.

Advantages and Disadvantages

Advantages: - High-speed operation - Low power consumption - 3-state outputs provide flexibility in connecting multiple devices

Disadvantages: - Limited voltage range (4.5V to 5.5V) - Not suitable for applications requiring higher output drive capability

Working Principles

The SN74AS821ADWR operates based on the principles of digital logic. It uses D-type flip-flops to store and transfer data. The clear input (CLR) allows for resetting the flip-flop, while the output enable input (OE) controls the state of the outputs. The device functions by capturing the data inputs (D0-D7) on the rising edge of the clock signal and storing them in the flip-flops. The stored data can then be accessed through the output pins (Q0-Q7).

Detailed Application Field Plans

The SN74AS821ADWR is commonly used in various digital systems and applications, including:

  1. Microprocessors and microcontrollers
  2. Data storage systems
  3. Communication systems
  4. Industrial automation
  5. Automotive electronics

Detailed and Complete Alternative Models

  1. SN74AS821AN - DIP (Dual In-line Package) version of the same IC
  2. SN74LS821 - Low-power Schottky version with similar functionality
  3. SN74HC821 - High-speed CMOS version with improved voltage range

These alternative models offer similar functionality to the SN74AS821ADWR, but may have different package options or performance characteristics.

Word count: 430 words

تکنیکی حل میں SN74AS821ADWR کے اطلاق سے متعلق 10 عام سوالات اور جوابات کی فہرست بنائیں

Sure! Here are 10 common questions and answers related to the application of SN74AS821ADWR:

  1. Q: What is SN74AS821ADWR? A: SN74AS821ADWR is a specific model of integrated circuit (IC) manufactured by Texas Instruments. It is a 10-bit bus interface latch with 3-state outputs.

  2. Q: What is the purpose of SN74AS821ADWR? A: This IC is commonly used in digital systems to latch data from a bus and provide 3-state outputs for interfacing with other components.

  3. Q: What is the operating voltage range for SN74AS821ADWR? A: The operating voltage range for this IC is typically between 4.5V and 5.5V.

  4. Q: How many bits can SN74AS821ADWR latch? A: SN74AS821ADWR can latch 10 bits of data.

  5. Q: What is the maximum clock frequency supported by SN74AS821ADWR? A: The maximum clock frequency supported by this IC is typically around 25 MHz.

  6. Q: Can SN74AS821ADWR be used in both parallel and serial data transfer applications? A: No, SN74AS821ADWR is primarily designed for parallel data transfer applications.

  7. Q: Does SN74AS821ADWR have any built-in error detection or correction features? A: No, this IC does not have any built-in error detection or correction capabilities.

  8. Q: What is the power consumption of SN74AS821ADWR? A: The power consumption of this IC depends on various factors such as clock frequency and load capacitance, but it is generally low.

  9. Q: Can SN74AS821ADWR be used in high-speed data communication systems? A: Yes, this IC can be used in high-speed data communication systems as long as the clock frequency and other specifications are within its limits.

  10. Q: Are there any specific precautions to consider when using SN74AS821ADWR? A: It is important to follow the manufacturer's datasheet for proper usage guidelines, including recommended operating conditions, voltage levels, and thermal considerations.

Please note that these answers are general and may vary depending on the specific application and requirements. Always refer to the manufacturer's datasheet for accurate and detailed information.