ON Semiconductor
画像はイメージの場合もございます。
商品詳細は仕様をご覧ください。
MC74LCX138MELG
詳細を表示 DataSheets

MC74LCX138MELG

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Decoding and demultiplexing
  • Characteristics: Low voltage, high-speed operation
  • Package: SOIC-16
  • Essence: 3-to-8 line decoder/demultiplexer
  • Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

  • Supply Voltage: 2.0V to 3.6V
  • Input Voltage: -0.5V to VCC + 0.5V
  • Output Voltage: -0.5V to VCC + 0.5V
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay: 4.5 ns (typical)
  • Output Current: ±24 mA
  • Input Capacitance: 3 pF (typical)

Detailed Pin Configuration

The MC74LCX138MELG has a total of 16 pins, which are assigned as follows:

  1. A0: Address input 0
  2. A1: Address input 1
  3. A2: Address input 2
  4. G1: Enable input
  5. Y0: Output 0
  6. Y1: Output 1
  7. Y2: Output 2
  8. Y3: Output 3
  9. Y4: Output 4
  10. Y5: Output 5
  11. Y6: Output 6
  12. Y7: Output 7
  13. G2A: Enable input 2
  14. G2B: Enable input 3
  15. VCC: Positive power supply
  16. GND: Ground

Functional Features

The MC74LCX138MELG is a 3-to-8 line decoder/demultiplexer IC. It takes three address inputs (A0, A1, and A2) and generates eight outputs (Y0 to Y7) based on the input combination. The G1 and G2A/G2B inputs control the enable/disable functionality of the decoder/demultiplexer.

Advantages and Disadvantages

Advantages: - Low voltage operation allows for compatibility with various systems - High-speed operation enables quick decoding and demultiplexing - Compact SOIC-16 package saves board space - Wide operating temperature range ensures reliability in different environments

Disadvantages: - Limited output current may restrict certain applications - Input capacitance can affect signal integrity in high-frequency applications

Working Principles

The MC74LCX138MELG works by decoding the binary input applied to the address pins (A0, A1, and A2) and activating the corresponding output line. The G1 and G2A/G2B inputs control the enable/disable functionality of the decoder/demultiplexer. When enabled, the selected output line becomes active, while all other outputs remain inactive.

Detailed Application Field Plans

The MC74LCX138MELG finds applications in various fields, including but not limited to: - Address decoding in microcontrollers and microprocessors - Memory selection in digital systems - Data routing in communication systems - Control signal generation in industrial automation

Detailed and Complete Alternative Models

  1. SN74LS138: Similar 3-to-8 line decoder/demultiplexer from Texas Instruments
  2. CD74HC138: High-speed CMOS version of the 3-to-8 line decoder/demultiplexer
  3. 74HCT138: CMOS IC with TTL-compatible inputs and outputs, suitable for mixed logic systems

These alternative models offer similar functionality and can be used as substitutes for the MC74LCX138MELG in various applications.

Word count: 346 words

技術ソリューションにおける MC74LCX138MELG の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of MC74LCX138MELG in technical solutions:

  1. Q: What is MC74LCX138MELG? A: MC74LCX138MELG is a specific type of integrated circuit (IC) decoder/demultiplexer that can be used in various technical applications.

  2. Q: What is the purpose of MC74LCX138MELG? A: The purpose of MC74LCX138MELG is to decode binary information and select one of multiple output lines based on the input signals.

  3. Q: What is the voltage range supported by MC74LCX138MELG? A: MC74LCX138MELG supports a voltage range of 2.0V to 3.6V, making it suitable for low-voltage applications.

  4. Q: How many output lines does MC74LCX138MELG have? A: MC74LCX138MELG has 8 output lines, labeled as Y0 to Y7.

  5. Q: Can MC74LCX138MELG be cascaded to increase the number of output lines? A: Yes, MC74LCX138MELG can be cascaded with other decoders to increase the number of output lines.

  6. Q: What is the maximum input frequency supported by MC74LCX138MELG? A: MC74LCX138MELG can support input frequencies up to 100 MHz.

  7. Q: Is MC74LCX138MELG compatible with both TTL and CMOS logic levels? A: Yes, MC74LCX138MELG is compatible with both TTL and CMOS logic levels, making it versatile for different applications.

  8. Q: Can MC74LCX138MELG be used in battery-powered devices? A: Yes, MC74LCX138MELG is suitable for battery-powered devices due to its low power consumption.

  9. Q: What is the typical propagation delay of MC74LCX138MELG? A: The typical propagation delay of MC74LCX138MELG is around 5 ns, ensuring fast and efficient operation.

  10. Q: Are there any specific application examples for MC74LCX138MELG? A: Yes, MC74LCX138MELG can be used in various applications such as address decoding, data routing, memory selection, and bus control.

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