ON Semiconductor
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MM74HC139M
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MM74HC139M

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Decoder/Demultiplexer
  • Characteristics: High-Speed CMOS Logic, Dual 2-to-4 Line Decoder/Demultiplexer
  • Package: 16-pin SOIC (Small Outline Integrated Circuit)
  • Essence: The MM74HC139M is a versatile decoder/demultiplexer IC that can be used in various digital applications.
  • Packaging/Quantity: Available in reels of 2500 pieces.

Specifications

  • Supply Voltage: 2V to 6V
  • High-Level Input Voltage: 2V
  • Low-Level Input Voltage: 0.8V
  • Output Current: ±25mA
  • Propagation Delay Time: 13ns (typical)
  • Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MM74HC139M has a total of 16 pins arranged as follows:

__ __ A1 |1 \__/ 16| Vcc A0 |2 15| Y0 E1 |3 14| Y1 E0 |4 MM 13| Y2 Y3 |5 74 12| Y3 Y2 |6 HC 11| GND Y1 |7 139 10| B0 Y0 |8 9| B1 -- --

Functional Features

  • Dual 2-to-4 Line Decoder/Demultiplexer functionality.
  • High-speed operation due to CMOS technology.
  • Low power consumption.
  • Wide operating voltage range.
  • Schmitt-trigger inputs for noise immunity.
  • Balanced propagation delays for accurate decoding.

Advantages and Disadvantages

Advantages

  • Versatile functionality suitable for various digital applications.
  • High-speed operation allows for efficient data processing.
  • Low power consumption helps in energy-efficient designs.
  • Wide operating voltage range provides flexibility in different systems.
  • Schmitt-trigger inputs ensure reliable operation in noisy environments.
  • Balanced propagation delays enable accurate decoding.

Disadvantages

  • Limited to 2-to-4 line decoding/demultiplexing, not suitable for larger-scale applications.
  • Requires careful consideration of input/output voltage levels to prevent damage.

Working Principles

The MM74HC139M operates as a decoder/demultiplexer by taking two address inputs (A0 and A1) and an enable input (E0 and E1). Based on the combination of these inputs, one of the four outputs (Y0 to Y3) is activated. The selected output becomes low while the remaining outputs remain high.

Detailed Application Field Plans

The MM74HC139M can be used in various digital applications, including but not limited to:

  1. Address decoding in microcontrollers and microprocessors.
  2. Data routing and selection in multiplexers.
  3. Memory address decoding in RAM and ROM modules.
  4. Signal demultiplexing in communication systems.
  5. Control signal generation in digital circuits.

Detailed and Complete Alternative Models

  1. SN74HC139N: Similar dual 2-to-4 line decoder/demultiplexer IC from Texas Instruments.
  2. CD74HC139E: Dual 2-to-4 line decoder/demultiplexer IC from Texas Instruments with extended temperature range.
  3. MC74HC139AN: Dual 2-to-4 line decoder/demultiplexer IC from ON Semiconductor.

These alternative models offer similar functionality and can be used as replacements for the MM74HC139M depending on specific requirements.

In conclusion, the MM74HC139M is a versatile decoder/demultiplexer IC with high-speed operation, low power consumption, and wide operating voltage range. It finds applications in various digital systems and offers reliable decoding functionality.

Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af MM74HC139M i tekniske løsninger

Sure! Here are 10 common questions and answers related to the application of MM74HC139M in technical solutions:

  1. Q: What is MM74HC139M? A: MM74HC139M is a dual 2-to-4 line decoder/demultiplexer integrated circuit (IC) that can be used in various digital logic applications.

  2. Q: What is the purpose of MM74HC139M? A: The purpose of MM74HC139M is to decode binary information from input lines and select one of the multiple output lines based on the input combination.

  3. Q: What is the voltage supply range for MM74HC139M? A: MM74HC139M operates with a voltage supply range of 2V to 6V.

  4. Q: How many inputs does MM74HC139M have? A: MM74HC139M has two 2-inputs, A0 and A1, which are used to select the desired output line.

  5. Q: How many output lines does MM74HC139M have? A: MM74HC139M has four output lines, Y0, Y1, Y2, and Y3, which can be selected based on the input combination.

  6. Q: Can MM74HC139M be cascaded to increase the number of output lines? A: Yes, MM74HC139M can be cascaded by connecting the outputs of one IC to the inputs of another IC to increase the number of output lines.

  7. Q: What is the maximum operating frequency of MM74HC139M? A: The maximum operating frequency of MM74HC139M is typically around 50 MHz.

  8. Q: Is MM74HC139M compatible with TTL logic levels? A: Yes, MM74HC139M is compatible with both TTL and CMOS logic levels.

  9. Q: What is the power consumption of MM74HC139M? A: The power consumption of MM74HC139M is relatively low, typically around a few milliwatts.

  10. Q: What are some common applications of MM74HC139M? A: MM74HC139M can be used in various applications such as address decoding, data routing, memory selection, multiplexing, and demultiplexing.

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