Texas Instruments
圖片可能僅供參考。
有關產品詳細信息，請參閱規格。
SN74LVC139ADR
詳情 數據表

SN74LVC139ADR

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Decoder/Demultiplexer
  • Characteristics: Low-voltage, high-speed, dual 2-to-4 line decoder/demultiplexer
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: Logic device that converts binary information from one format to another
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 1.65V to 5.5V
  • High-Speed Operation: 5.4 ns maximum propagation delay time
  • Low Power Consumption: 10µA maximum ICC
  • Output Drive Capability: ±24mA at 3.3V
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74LVC139ADR has a total of 16 pins, which are assigned as follows:

  1. A0: Address Input 0
  2. A1: Address Input 1
  3. GND: Ground
  4. Y0: Output 0
  5. Y1: Output 1
  6. Y2: Output 2
  7. Y3: Output 3
  8. G1: Enable Input 1
  9. G2: Enable Input 2
  10. VCC: Positive Power Supply
  11. B0: Address Input 0
  12. B1: Address Input 1
  13. Y4: Output 4
  14. Y5: Output 5
  15. Y6: Output 6
  16. Y7: Output 7

Functional Features

  • Dual 2-to-4 Line Decoder/Demultiplexer: Converts two address inputs into four mutually exclusive outputs
  • Low-Voltage Operation: Suitable for use in low-power applications
  • High-Speed Operation: Provides fast decoding and demultiplexing of input signals
  • Enable Inputs: Allows for easy control of the device's operation

Advantages and Disadvantages

Advantages: - Low power consumption - Wide supply voltage range - High-speed operation - Compact SOIC package

Disadvantages: - Limited number of output lines (up to 7)

Working Principles

The SN74LVC139ADR is a decoder/demultiplexer IC that operates based on the binary address inputs provided. The two address inputs, A0 and A1, determine which output line(s) will be activated. The enable inputs, G1 and G2, control the overall operation of the device.

When the enable inputs are active (low), the selected output line(s) will reflect the binary information from the address inputs. When the enable inputs are inactive (high), all output lines will be in a high-impedance state.

Detailed Application Field Plans

The SN74LVC139ADR can be used in various applications, including:

  1. Address Decoding: Used to decode specific addresses in microcontrollers or memory systems.
  2. Data Demultiplexing: Converts a single data stream into multiple parallel data streams.
  3. Signal Routing: Enables the selection of different signal paths based on address inputs.
  4. Control Systems: Provides address-based control signals for various subsystems.

Detailed and Complete Alternative Models

Some alternative models to the SN74LVC139ADR include:

  1. CD74HC139E: High-speed CMOS logic dual 2-to-4 line decoder/demultiplexer.
  2. MC74VHC139DTR2G: Dual 2-to-4 line decoder/demultiplexer with Schmitt-trigger inputs.
  3. 74ACT138SCX: Advanced CMOS logic 3-to-8 line decoder/demultiplexer.

These alternative models offer similar functionality and can be used as substitutes based on specific requirements.

Word count: 446 words

10個與SN74LVC139ADR在技術方案中應用相關的常見問題與解答

Sure! Here are 10 common questions and answers related to the application of SN74LVC139ADR:

  1. Q: What is SN74LVC139ADR? A: SN74LVC139ADR is a dual 2-to-4 line decoder/demultiplexer integrated circuit (IC) commonly used in digital electronics.

  2. Q: What is the purpose of SN74LVC139ADR? A: SN74LVC139ADR is used to decode binary information from two input lines into four output lines, making it useful for address decoding, data routing, and signal demultiplexing applications.

  3. Q: What is the voltage range supported by SN74LVC139ADR? A: SN74LVC139ADR supports a wide voltage range of 1.65V to 5.5V, making it compatible with various logic families.

  4. Q: How many inputs does SN74LVC139ADR have? A: SN74LVC139ADR has two input lines, A0 and A1, which can be used to select one of the four output lines.

  5. Q: How many output lines does SN74LVC139ADR have? A: SN74LVC139ADR has four output lines, Y0, Y1, Y2, and Y3, which correspond to the possible combinations of the input lines.

  6. Q: Can SN74LVC139ADR be cascaded to increase the number of outputs? A: Yes, multiple SN74LVC139ADR ICs can be cascaded together to increase the number of output lines by connecting the enable (E) pin of subsequent ICs to the output of the previous IC.

  7. Q: What is the maximum operating frequency of SN74LVC139ADR? A: SN74LVC139ADR has a maximum operating frequency of 100 MHz, making it suitable for high-speed digital applications.

  8. Q: Is SN74LVC139ADR compatible with both CMOS and TTL logic levels? A: Yes, SN74LVC139ADR is designed to be compatible with both CMOS and TTL logic levels, allowing it to interface with a wide range of devices.

  9. Q: What is the power supply voltage required for SN74LVC139ADR? A: SN74LVC139ADR requires a power supply voltage (VCC) between 1.65V and 5.5V, depending on the desired logic level compatibility.

  10. Q: Can SN74LVC139ADR handle high current loads? A: SN74LVC139ADR has output drivers capable of sinking or sourcing up to 32 mA of current, making it suitable for driving moderate loads directly.

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