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TC74LCX138FT(EL)
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TC74LCX138FT(EL)

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Decoding and demultiplexing
  • Characteristics: Low-voltage, high-speed, low-power consumption
  • Package: TSSOP (Thin Shrink Small Outline Package)
  • Essence: 3-to-8 line decoder/demultiplexer
  • Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

  • Supply Voltage: 2.0V to 3.6V
  • High-Level Input Voltage: 2.0V to VCC + 0.3V
  • Low-Level Input Voltage: -0.3V to 0.8V
  • High-Level Output Voltage: VCC - 0.3V
  • Low-Level Output Voltage: 0.3V
  • Maximum Operating Frequency: 100MHz
  • Propagation Delay Time: 2.5ns (typical)
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TC74LCX138FT(EL) has a total of 16 pins:

  1. GND (Ground)
  2. A0 (Address input)
  3. A1 (Address input)
  4. A2 (Address input)
  5. E1 (Enable input)
  6. Y0 (Output)
  7. Y1 (Output)
  8. Y2 (Output)
  9. Y3 (Output)
  10. Y4 (Output)
  11. Y5 (Output)
  12. Y6 (Output)
  13. Y7 (Output)
  14. E2 (Enable input)
  15. VCC (Power supply)
  16. NC (No connection)

Functional Features

The TC74LCX138FT(EL) is a 3-to-8 line decoder/demultiplexer IC. It takes a 3-bit binary input and selects one of the eight outputs based on the input combination. The enable inputs (E1 and E2) control the operation of the decoder/demultiplexer. When both enable inputs are high, the IC is enabled, and the selected output is determined by the address inputs (A0, A1, and A2).

Advantages and Disadvantages

Advantages: - Low-voltage operation allows for compatibility with various systems - High-speed operation enables quick decoding and demultiplexing - Low-power consumption reduces energy requirements

Disadvantages: - Limited to 3-bit input, restricting the number of possible combinations - Not suitable for applications requiring higher bit decoding or demultiplexing

Working Principles

The TC74LCX138FT(EL) works based on the principle of digital logic. The address inputs determine the desired output line by activating the corresponding combination of transistors within the IC. The enable inputs control the overall operation of the decoder/demultiplexer.

Detailed Application Field Plans

The TC74LCX138FT(EL) finds applications in various fields, including:

  1. Microcontrollers: Used for address decoding in microcontroller-based systems.
  2. Memory Systems: Enables selection of specific memory banks or modules.
  3. Data Communication: Facilitates data routing and selection in communication systems.
  4. Display Systems: Controls multiplexed displays by selecting individual segments.
  5. Industrial Automation: Provides address decoding functionality in automation systems.

Detailed and Complete Alternative Models

  1. SN74LS138: Similar 3-to-8 line decoder/demultiplexer IC from Texas Instruments.
  2. CD74HC138: High-speed CMOS 3-to-8 line decoder/demultiplexer IC from Texas Instruments.
  3. 74HC238: 3-to-8 line decoder/demultiplexer IC from NXP Semiconductors.

These alternative models offer similar functionality and can be used as substitutes for the TC74LCX138FT(EL) in various applications.

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Énumérez 10 questions et réponses courantes liées à l'application de TC74LCX138FT(EL) dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of TC74LCX138FT(EL) in technical solutions:

  1. Q: What is TC74LCX138FT(EL)? A: TC74LCX138FT(EL) is a specific model of a 3-to-8 line decoder/demultiplexer integrated circuit (IC).

  2. Q: What is the purpose of TC74LCX138FT(EL)? A: The purpose of TC74LCX138FT(EL) is to decode a 3-bit binary input and activate one of the eight output lines based on the input value.

  3. Q: What voltage levels does TC74LCX138FT(EL) support? A: TC74LCX138FT(EL) supports voltage levels between 2.0V and 3.6V.

  4. Q: How many inputs does TC74LCX138FT(EL) have? A: TC74LCX138FT(EL) has three inputs, labeled A0, A1, and A2, which are used to select the desired output line.

  5. Q: How many output lines does TC74LCX138FT(EL) have? A: TC74LCX138FT(EL) has eight output lines, labeled Y0 to Y7.

  6. Q: Can TC74LCX138FT(EL) be cascaded to increase the number of output lines? A: Yes, multiple TC74LCX138FT(EL) ICs can be cascaded together to increase the number of output lines.

  7. Q: What is the maximum current that TC74LCX138FT(EL) can sink/source on its output lines? A: TC74LCX138FT(EL) can sink/source up to 24mA of current on each output line.

  8. Q: Does TC74LCX138FT(EL) have any built-in protection features? A: Yes, TC74LCX138FT(EL) has built-in ESD (Electrostatic Discharge) protection on its inputs and outputs.

  9. Q: Can TC74LCX138FT(EL) be used in both digital and analog applications? A: No, TC74LCX138FT(EL) is specifically designed for digital applications and should not be used in analog circuits.

  10. Q: What is the package type of TC74LCX138FT(EL)? A: TC74LCX138FT(EL) is available in a TSSOP (Thin Shrink Small Outline Package) package type.

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