74AHCT138BQ,115

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-speed, low-power, 3-to-8 line decoder/demultiplexer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Converts a binary input into a corresponding output based on the selected line
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 2.0V to 5.5V
• Input Voltage: -0.5V to VCC + 0.5V
• Output Voltage: -0.5V to VCC + 0.5V
• Operating Temperature: -40°C to +125°C
• Propagation Delay: 7 ns (typical)
• Output Current: ±25 mA
• Number of Inputs: 3
• Number of Outputs: 8

Detailed Pin Configuration

1. GND (Ground)
2. A0 (Address Input 0)
3. A1 (Address Input 1)
4. A2 (Address Input 2)
5. /E (Enable Input)
6. Y0 (Output 0)
7. Y1 (Output 1)
8. Y2 (Output 2)
9. Y3 (Output 3)
10. Y4 (Output 4)
11. Y5 (Output 5)
12. Y6 (Output 6)
13. Y7 (Output 7)
14. VCC (Positive Power Supply)

Functional Features

• Converts a 3-bit binary input into one of eight outputs
• Active LOW enable input (/E) allows for easy control of the decoder
• High-speed operation with low power consumption
• Wide operating voltage range for flexibility in various applications

Advantages and Disadvantages

Advantages: - High-speed decoding capability - Low power consumption - Wide operating voltage range - Compact SOIC package for space-saving designs

Disadvantages: - Limited number of inputs and outputs (3-to-8 configuration) - Not suitable for complex decoding requirements

Working Principles

The 74AHCT138BQ,115 is a decoder/demultiplexer IC that converts a 3-bit binary input into one of eight corresponding outputs. The active LOW enable input (/E) controls the operation of the decoder. When /E is HIGH, all outputs are in a high-impedance state. When /E is LOW, the selected output line is activated based on the binary input.

The IC operates at high speed while consuming low power, making it suitable for various applications where decoding is required. It can be powered by a wide range of supply voltages, providing flexibility in different scenarios.

Detailed Application Field Plans

The 74AHCT138BQ,115 finds applications in various fields where decoding or demultiplexing is necessary. Some common application areas include:

1. Address decoding in microcontrollers and microprocessors
2. Memory selection in digital systems
3. Data routing in communication systems
4. Signal demultiplexing in audio/video equipment
5. Control signal generation in industrial automation

Detailed and Complete Alternative Models

1. 74HC138: Similar 3-to-8 line decoder/demultiplexer with slightly different specifications.
2. CD74AC138: Another 3-to-8 line decoder/demultiplexer with improved speed and performance.
3. SN74LS138: A popular TTL logic family decoder/demultiplexer with similar functionality.

These alternative models offer similar decoding capabilities but may have variations in terms of power consumption, speed, and voltage range. It is important to consider the specific requirements of the application when selecting an alternative model.

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