Texas Instruments
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SN74LV138ATPWR
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SN74LV138ATPWR

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Decoder/Demultiplexer
  • Characteristics: Low-voltage, 3-to-8 line decoder/demultiplexer
  • Package: TSSOP (Thin Shrink Small Outline Package)
  • Essence: Converts a binary input into a corresponding output line
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 1.65V to 5.5V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Maximum Operating Frequency: 30 MHz
  • Number of Inputs: 3
  • Number of Outputs: 8
  • Propagation Delay Time: 6 ns (typical)

Detailed Pin Configuration

The SN74LV138ATPWR has a total of 16 pins. The pin configuration is as follows:

  1. GND (Ground)
  2. A0 (Input A0)
  3. A1 (Input A1)
  4. A2 (Input A2)
  5. Y0 (Output Y0)
  6. Y1 (Output Y1)
  7. Y2 (Output Y2)
  8. Y3 (Output Y3)
  9. Y4 (Output Y4)
  10. Y5 (Output Y5)
  11. Y6 (Output Y6)
  12. Y7 (Output Y7)
  13. E1 (Enable Input 1)
  14. E2 (Enable Input 2)
  15. VCC (Supply Voltage)
  16. GND (Ground)

Functional Features

The SN74LV138ATPWR is a low-voltage decoder/demultiplexer IC that takes a 3-bit binary input and selects one of the eight output lines based on the input combination. It operates at a wide supply voltage range of 1.65V to 5.5V, making it suitable for various low-power applications. The IC has two enable inputs (E1 and E2) that control the operation of the decoder/demultiplexer.

Advantages and Disadvantages

Advantages: - Low-voltage operation - Wide supply voltage range - Compact TSSOP package - Fast propagation delay time

Disadvantages: - Limited number of inputs and outputs - Requires external components for complete functionality

Working Principles

The SN74LV138ATPWR works based on the principle of binary decoding. The three input lines (A0, A1, and A2) represent a binary number from 0 to 7. The active-low enable inputs (E1 and E2) control the operation of the decoder. When both enable inputs are high, the decoder is disabled, and all output lines are in a high-impedance state. When one or both enable inputs are low, the decoder is enabled, and the selected output line(s) corresponding to the input combination become active.

Detailed Application Field Plans

The SN74LV138ATPWR can be used in various applications, including but not limited to:

  1. Address decoding in microcontrollers and microprocessors
  2. Memory selection in digital systems
  3. Data routing in communication systems
  4. Multiplexing and demultiplexing signals in electronic circuits
  5. Control signal generation in industrial automation

Detailed and Complete Alternative Models

  1. SN74LV138APWR: Similar specifications and pin configuration, but available in a different package (TSSOP)
  2. SN74HC138N: Higher voltage operation (2V to 6V), same pin configuration, available in DIP package
  3. CD74HC138E: Higher voltage operation (2V to 6V), same pin configuration, available in PDIP package

These alternative models offer similar functionality and can be used as replacements for the SN74LV138ATPWR depending on specific requirements.

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Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af SN74LV138ATPWR i tekniske løsninger

Sure! Here are 10 common questions and answers related to the application of SN74LV138ATPWR:

  1. Question: What is SN74LV138ATPWR?
    - Answer: SN74LV138ATPWR is a 3-to-8 line decoder/demultiplexer integrated circuit (IC) manufactured by Texas Instruments.

  2. Question: What is the purpose of SN74LV138ATPWR?
    - Answer: The purpose of SN74LV138ATPWR is to decode a 3-bit binary input and activate one of the eight output lines based on the input value.

  3. Question: What is the voltage supply range for SN74LV138ATPWR?
    - Answer: SN74LV138ATPWR operates with a voltage supply range of 2V to 5.5V.

  4. Question: How many input pins does SN74LV138ATPWR have?
    - Answer: SN74LV138ATPWR has three input pins, A0, A1, and A2, which together form a 3-bit binary input.

  5. Question: How many output pins does SN74LV138ATPWR have?
    - Answer: SN74LV138ATPWR has eight output pins, Y0 to Y7, which correspond to the eight possible combinations of the 3-bit binary input.

  6. Question: Can SN74LV138ATPWR be used as a demultiplexer?
    - Answer: Yes, SN74LV138ATPWR can be used as a demultiplexer by connecting the appropriate input pins and using the output pins to select different output devices.

  7. Question: What is the maximum output current of SN74LV138ATPWR?
    - Answer: The maximum output current of SN74LV138ATPWR is 8mA.

  8. Question: Can SN74LV138ATPWR be cascaded to increase the number of output lines?
    - Answer: Yes, multiple SN74LV138ATPWR ICs can be cascaded together to increase the number of output lines by connecting the enable (E) pin of one IC to the output of another IC.

  9. Question: What is the propagation delay of SN74LV138ATPWR?
    - Answer: The propagation delay of SN74LV138ATPWR is typically around 6ns.

  10. Question: What are some common applications of SN74LV138ATPWR?
    - Answer: SN74LV138ATPWR is commonly used in digital systems for address decoding, memory selection, data routing, and general-purpose logic functions.

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