MC74HC138ANG

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-Speed CMOS Logic, 3-to-8 Line Decoder/Demultiplexer
• Package: DIP-16 (Dual In-Line Package with 16 pins)
• Essence: MC74HC138ANG is a decoder/demultiplexer IC that converts a binary input into a corresponding output line.
• Packaging/Quantity: Available in tubes or reels, with a quantity of 25 pieces per tube/reel.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: -0.5V to VCC + 0.5V
• Output Voltage: -0.5V to VCC + 0.5V
• Operating Temperature Range: -55°C to +125°C
• Propagation Delay: 15 ns (typical)
• Output Current: ±25 mA
• Logic Family: HC (High-Speed CMOS)

Detailed Pin Configuration

MC74HC138ANG has a total of 16 pins, each serving a specific purpose:

1. GND: Ground reference voltage.
2. A0, A1, A2: Binary input lines for address selection.
3. E1, E2: Enable inputs for output selection.
4. Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7: Output lines corresponding to the selected address.
5. VCC: Positive supply voltage.

Functional Features

• Converts a 3-bit binary input into one of eight possible output lines.
• Enables easy decoding and demultiplexing of signals.
• High-speed operation suitable for time-critical applications.
• Low power consumption due to CMOS technology.
• Wide operating voltage range allows compatibility with various systems.

Advantages and Disadvantages

Advantages: - High-speed operation ensures quick response times. - Low power consumption makes it energy-efficient. - Versatile application in decoding and demultiplexing tasks. - Wide operating voltage range provides flexibility.

Disadvantages: - Limited to 3-bit binary input, restricting the number of output possibilities. - Propagation delay may affect real-time applications with strict timing requirements.

Working Principles

MC74HC138ANG operates based on the principle of binary decoding. The three address input lines (A0, A1, A2) determine which output line is selected. When the enable inputs (E1, E2) are activated, the decoder/demultiplexer translates the binary input into a corresponding output line. The selected output line becomes active while all other outputs remain inactive.

Detailed Application Field Plans

MC74HC138ANG finds applications in various fields, including:

1. Digital electronics: Used for address decoding in microprocessors and memory systems.
2. Communication systems: Enables signal routing and selection in multiplexers and demultiplexers.
3. Industrial automation: Facilitates control signal distribution and selection in PLCs (Programmable Logic Controllers).
4. Automotive electronics: Utilized in vehicle control units for decoding sensor inputs and activating specific outputs.
5. Consumer electronics: Integrated into remote control devices for decoding button presses and controlling different functions.

Detailed and Complete Alternative Models

Some alternative models that serve similar purposes to MC74HC138ANG include:

1. SN74LS138N: 3-to-8 Line Decoder/Demultiplexer IC from Texas Instruments.
2. CD74HC238E: High-Speed CMOS Logic 3-to-8 Line Decoder/Demultiplexer from Texas Instruments.
3. 74HCT138: 3-to-8 Line Decoder/Demultiplexer IC from NXP Semiconductors.

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

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