MC74ACT138DR2G

Overview

Category: Integrated Circuit (IC)

Use: Decoding and demultiplexing digital signals

Characteristics: - High-speed operation - Low power consumption - Wide operating voltage range - Schmitt-trigger inputs for noise immunity - 3-to-8 line decoding capability

Package: SOIC-16 (Small Outline Integrated Circuit)

Essence: MC74ACT138DR2G is a decoder/demultiplexer IC that converts binary information from three input lines into eight output lines.

Packaging/Quantity: The MC74ACT138DR2G is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6 ns (max)
• Output Current: ±24 mA

Pin Configuration

The MC74ACT138DR2G has a total of 16 pins, which are assigned as follows:

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

Functional Features

The MC74ACT138DR2G is designed to perform the following functions: - Decoding of three binary inputs into eight mutually exclusive outputs - Demultiplexing of digital signals - High-speed operation for time-critical applications - Low power consumption for energy efficiency - Schmitt-trigger inputs for improved noise immunity

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient signal processing - Low power consumption reduces energy usage - Wide operating voltage range provides flexibility in various applications - Schmitt-trigger inputs enhance noise immunity, ensuring reliable operation - 3-to-8 line decoding capability enables complex digital signal manipulation

Disadvantages: - Limited output current may restrict certain high-power applications - Propagation delay time of 6 ns (max) may introduce slight delays in time-sensitive systems

Working Principles

The MC74ACT138DR2G operates based on the principles of digital decoding and demultiplexing. It takes three binary input lines (A0, A1, and A2) and converts them into eight mutually exclusive output lines (Y0-Y7). The enable inputs (E1 and E2) control the activation of specific output lines.

When the appropriate combination of input lines is applied, the corresponding output line becomes active, while all other output lines remain inactive. This functionality allows for efficient decoding and demultiplexing of digital signals in various applications.

Detailed Application Field Plans

The MC74ACT138DR2G finds application in a wide range of fields, including but not limited to: - Digital communication systems - Data transmission and reception - Address decoding in memory systems - Microprocessor-based systems - Programmable logic devices - Industrial automation - Robotics - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the MC74ACT138DR2G include: - 74HC138: High-speed CMOS logic decoder/demultiplexer - CD74AC138: Advanced CMOS logic decoder/demultiplexer - SN74LS138: Low-power Schottky TTL decoder/demultiplexer - 74F138: Fast CMOS logic decoder/demultiplexer

These alternative models can be considered based on specific requirements, such as operating voltage range, speed, power consumption, and package type.

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