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74LCX16821MTD
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74LCX16821MTD

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Logic Level Translator
  • Characteristics: Low Voltage, High-Speed, Bidirectional
  • Package: TSSOP-56
  • 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
  • Number of Channels: 20
  • Maximum Data Rate: 400 Mbps
  • Propagation Delay: 2.5 ns (typical)
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74LCX16821MTD has a total of 56 pins arranged as follows:

  1. VCCB
  2. B1
  3. B2
  4. B3
  5. B4
  6. B5
  7. B6
  8. B7
  9. B8
  10. B9
  11. B10
  12. GND
  13. A1
  14. A2
  15. A3
  16. A4
  17. A5
  18. A6
  19. A7
  20. A8
  21. A9
  22. A10
  23. OEAB
  24. GND
  25. Y1
  26. Y2
  27. Y3
  28. Y4
  29. Y5
  30. Y6
  31. Y7
  32. Y8
  33. Y9
  34. Y10
  35. GND
  36. VCCA
  37. B11
  38. B12
  39. B13
  40. B14
  41. B15
  42. B16
  43. B17
  44. B18
  45. B19
  46. B20
  47. GND
  48. A11
  49. A12
  50. A13
  51. A14
  52. A15
  53. A16
  54. A17
  55. A18
  56. A19

Functional Features

  • Bidirectional voltage level translation between different logic families
  • Supports voltage translation from 1.8V to 3.3V and vice versa
  • Low power consumption
  • High-speed operation
  • 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 - Bidirectional translation simplifies interfacing between different voltage domains - High-speed operation enables efficient data transfer - ESD protection ensures reliability in harsh environments

Disadvantages: - Limited number of channels (20) - Not suitable for voltage translation below 1.8V or above 3.3V

Working Principles

The 74LCX16821MTD utilizes a combination of MOSFETs and CMOS technology to achieve bidirectional voltage level translation. It operates by detecting the input logic levels and translating them to the corresponding output levels based on the selected voltage domain. The device incorporates internal circuitry to ensure fast switching times and minimize propagation delays.

Detailed Application Field Plans

The 74LCX16821MTD is commonly used in applications where logic signals need to be translated between different voltage domains. Some typical application fields include:

  1. Microcontroller interfacing with peripherals operating at different voltage levels
  2. Communication interfaces between devices using different logic families
  3. Level shifting in battery-powered portable devices
  4. Signal conversion in mixed-voltage systems

Detailed and Complete Alternative Models

  1. 74LVC16821A: Similar functionality, but operates at a wider supply voltage range (1.2V to 3.6V)
  2. SN74LVC1T45: Single-channel bidirectional level shifter with automatic direction control
  3. TXB0108: Eight-channel bi-directional voltage-level translator with automatic direction sensing

These alternative models offer similar features and can be considered based on specific application requirements.

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10 domande e risposte comuni relative all'applicazione di 74LCX16821MTD nelle soluzioni tecniche

Sure! Here are 10 common questions and answers related to the application of 74LCX16821MTD in technical solutions:

  1. Q: What is the 74LCX16821MTD? A: The 74LCX16821MTD is a 20-bit universal bus transceiver with 3-state outputs, designed for low-voltage applications.

  2. Q: What is the operating voltage range of the 74LCX16821MTD? A: The operating voltage range is typically between 2.0V and 3.6V.

  3. Q: What is the maximum data transfer rate supported by the 74LCX16821MTD? A: The maximum data transfer rate is typically 400Mbps.

  4. Q: Can the 74LCX16821MTD be used for bidirectional communication? A: Yes, it can be used for bidirectional communication as it has separate input and output ports.

  5. Q: How many bits can the 74LCX16821MTD handle? A: It can handle up to 20 bits of data.

  6. Q: Does the 74LCX16821MTD have built-in protection features? A: Yes, it has built-in ESD protection on all inputs and outputs.

  7. Q: Can the 74LCX16821MTD be used in high-speed applications? A: Yes, it is suitable for high-speed applications due to its low propagation delay and fast switching times.

  8. Q: What is the power supply current requirement for the 74LCX16821MTD? A: The power supply current is typically around 10mA.

  9. Q: Can the 74LCX16821MTD be cascaded to handle more than 20 bits? A: Yes, multiple devices can be cascaded to handle larger data widths.

  10. Q: What are the typical applications of the 74LCX16821MTD? A: The 74LCX16821MTD is commonly used in data communication systems, networking equipment, and other digital logic applications.

Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.