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74LCX821WM
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74LCX821WM

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Logic Level Translator
  • Characteristics: Low Voltage, High-Speed, Bi-Directional
  • Package: 20-Pin TSSOP (Thin Shrink Small Outline Package)
  • Essence: Translates logic levels between different voltage domains
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 1.65V to 3.6V
  • Logic Voltage Levels: 1.8V, 2.5V, 3.3V
  • Maximum Data Rate: 400 Mbps
  • Number of Channels: 8
  • Input/Output Compatibility: TTL, CMOS
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74LCX821WM has a total of 20 pins. The pin configuration is as follows:

  1. OE (Output Enable) 1
  2. A1 (Input/Output Channel 1)
  3. B1 (Input/Output Channel 1)
  4. GND (Ground)
  5. B2 (Input/Output Channel 2)
  6. A2 (Input/Output Channel 2)
  7. VCC (Supply Voltage)
  8. OE (Output Enable) 2
  9. A3 (Input/Output Channel 3)
  10. B3 (Input/Output Channel 3)
  11. B4 (Input/Output Channel 4)
  12. A4 (Input/Output Channel 4)
  13. GND (Ground)
  14. A5 (Input/Output Channel 5)
  15. B5 (Input/Output Channel 5)
  16. VCC (Supply Voltage)
  17. OE (Output Enable) 3
  18. B6 (Input/Output Channel 6)
  19. A6 (Input/Output Channel 6)
  20. B7 (Input/Output Channel 7)

Functional Features

  • Bi-directional logic level translation between different voltage domains
  • Supports voltage translation from 1.8V to 3.3V and vice versa
  • High-speed operation with a maximum data rate of 400 Mbps
  • Low power consumption
  • Wide operating temperature range for versatile applications

Advantages and Disadvantages

Advantages: - Enables seamless communication between devices operating at different voltage levels - High-speed performance allows for efficient data transfer - Low power consumption helps in reducing overall system energy requirements - Compact package size saves board space

Disadvantages: - Limited number of channels (8) may not be sufficient for complex systems requiring more connections - Not suitable for voltage translation beyond the specified range

Working Principles

The 74LCX821WM is designed to translate logic levels between different voltage domains. It utilizes a combination of MOSFETs and CMOS technology to achieve bi-directional voltage translation. The device operates by monitoring the input logic levels and translating them to the desired output voltage level based on the supply voltage applied.

Detailed Application Field Plans

The 74LCX821WM finds applications in various fields, including:

  1. Microcontroller interfacing: Allows communication between microcontrollers operating at different voltage levels.
  2. Sensor networks: Facilitates data exchange between sensors operating at different voltage domains.
  3. Battery-powered devices: Enables voltage translation in low-power portable devices.
  4. Industrial automation: Supports voltage translation in control systems with mixed voltage components.
  5. Communication systems: Helps in connecting devices with different logic voltage requirements.

Detailed and Complete Alternative Models

  1. SN74LVC1T45: Single-Bit Dual-Supply Bus Transceiver
  2. TXB0108: 8-Bit Bidirectional Voltage-Level Translator
  3. PCA9306: Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator

These alternative models offer similar functionality and can be used as substitutes for the 74LCX821WM in various applications.

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Luettele 10 yleistä kysymystä ja vastausta, jotka liittyvät 74LCX821WM :n soveltamiseen teknisissä ratkaisuissa

Sure! Here are 10 common questions and answers related to the application of 74LCX821WM in technical solutions:

  1. Q: What is the 74LCX821WM? A: The 74LCX821WM 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 main features of the 74LCX821WM? A: The main features include low voltage operation, 3-state outputs, high-speed operation, and compatibility with both TTL and CMOS logic levels.

  3. Q: How can I use the 74LCX821WM in my technical solution? A: You can use the 74LCX821WM for various applications such as data storage, synchronization, and signal buffering in digital systems.

  4. Q: What is the operating voltage range of the 74LCX821WM? A: The 74LCX821WM operates within a voltage range of 2.0V to 3.6V.

  5. Q: Can I connect multiple 74LCX821WM ICs together? A: Yes, you can connect multiple 74LCX821WM ICs together to expand the number of flip-flops or to create larger storage systems.

  6. Q: Does the 74LCX821WM support bidirectional data flow? A: No, the 74LCX821WM only supports unidirectional data flow from the D input to the Q output.

  7. Q: What is the maximum clock frequency supported by the 74LCX821WM? A: The 74LCX821WM can operate at a maximum clock frequency of 200 MHz.

  8. Q: Can I use the 74LCX821WM in both TTL and CMOS systems? A: Yes, the 74LCX821WM is designed to be compatible with both TTL and CMOS logic levels, making it versatile for various system designs.

  9. Q: What is the power consumption of the 74LCX821WM? A: The power consumption of the 74LCX821WM is relatively low due to its low voltage operation, making it suitable for battery-powered applications.

  10. Q: Are there any specific precautions I should take when using the 74LCX821WM? A: It is important to ensure that the voltage levels applied to the inputs and outputs of the 74LCX821WM are within the specified range to prevent damage to the IC. Additionally, proper decoupling capacitors should be used to minimize noise and ensure stable operation.

Please note that these questions and answers are general and may vary depending on specific application requirements.