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SN74LVC821ADW
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SN74LVC821ADW

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Logic Level Translator
  • Characteristics: High-speed, low-power, voltage-level shifting
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: Translates signals between different voltage levels
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 1.65V to 5.5V
  • High-Level Input Voltage: 2.3V to VCC + 0.5V
  • Low-Level Input Voltage: -0.5V to 0.8V
  • High-Level Output Voltage: VCC - 0.4V
  • Low-Level Output Voltage: 0.4V
  • Maximum Propagation Delay: 6.5ns
  • Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The SN74LVC821ADW has a total of 20 pins. The pin configuration is as follows:

  1. A1
  2. B1
  3. GND
  4. B2
  5. A2
  6. OE#
  7. Y1
  8. Y2
  9. VCC
  10. GND
  11. A3
  12. B3
  13. GND
  14. B4
  15. A4
  16. OE#
  17. Y3
  18. Y4
  19. VCC
  20. GND

Functional Features

  • Bidirectional voltage-level translation
  • Supports multiple voltage level combinations
  • High-speed operation
  • Low power consumption
  • Schmitt-trigger inputs for noise immunity
  • ESD protection on all inputs and outputs

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems - High-speed operation enables efficient signal translation - Low power consumption reduces energy requirements - Schmitt-trigger inputs provide noise immunity, ensuring reliable performance - ESD protection safeguards against electrostatic discharge damage

Disadvantages: - Limited to 4-bit bidirectional voltage-level translation - Not suitable for applications requiring higher bit widths

Working Principles

The SN74LVC821ADW is a logic level translator that facilitates the conversion of signals between different voltage levels. It operates by utilizing a combination of MOSFETs and CMOS technology. The device consists of four bidirectional buffers with separate output enable (OE#) inputs. These buffers allow for bi-directional voltage translation between two independent voltage supply rails.

Detailed Application Field Plans

The SN74LVC821ADW finds application in various fields where voltage-level translation is required. Some potential areas of use include:

  1. Microcontroller interfacing with different voltage peripherals
  2. Communication systems involving multiple voltage domains
  3. Sensor networks requiring voltage compatibility
  4. Industrial automation and control systems
  5. Portable electronic devices with mixed voltage components

Detailed and Complete Alternative Models

  1. TXB0108PWR: 8-Bit Bidirectional Voltage-Level Translator
  2. PCA9306DCTR: Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator
  3. SN74AVC4T245PW: 4-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation

These alternative models offer similar functionality and can be considered as alternatives to the SN74LVC821ADW based on specific application requirements.

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10 domande e risposte comuni relative all'applicazione di SN74LVC821ADW nelle soluzioni tecniche

Sure! Here are 10 common questions and answers related to the application of SN74LVC821ADW:

  1. Q: What is SN74LVC821ADW? A: SN74LVC821ADW is a specific type of integrated circuit (IC) that functions as an 8-bit D-type flip-flop with 3-state outputs.

  2. Q: What are the typical applications of SN74LVC821ADW? A: SN74LVC821ADW is commonly used in digital systems for data storage, synchronization, and signal buffering.

  3. Q: What is the operating voltage range of SN74LVC821ADW? A: The operating voltage range of SN74LVC821ADW is typically between 1.65V and 5.5V.

  4. Q: How many flip-flops are there in SN74LVC821ADW? A: SN74LVC821ADW contains 8 individual flip-flops, each capable of storing one bit of data.

  5. Q: Can SN74LVC821ADW be cascaded to create larger registers? A: Yes, multiple SN74LVC821ADW ICs can be cascaded together to create larger registers or shift registers.

  6. Q: What is the maximum clock frequency supported by SN74LVC821ADW? A: SN74LVC821ADW can operate at clock frequencies up to 100 MHz.

  7. Q: Does SN74LVC821ADW have any built-in output enable functionality? A: Yes, SN74LVC821ADW has an active-low output enable pin (OE) that can be used to disable the outputs when needed.

  8. Q: What is the power supply current consumption of SN74LVC821ADW? A: The power supply current consumption of SN74LVC821ADW depends on the operating conditions but typically ranges from a few microamps to a few milliamps.

  9. Q: Can SN74LVC821ADW tolerate overvoltage or undervoltage conditions? A: SN74LVC821ADW has built-in protection mechanisms that allow it to tolerate limited overvoltage and undervoltage conditions, but it is recommended to operate within the specified voltage range for reliable operation.

  10. Q: Are there any specific layout considerations for using SN74LVC821ADW? A: It is generally recommended to follow good PCB layout practices, such as minimizing trace lengths, providing proper decoupling capacitors, and ensuring signal integrity, to achieve optimal performance with SN74LVC821ADW.

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.