MC74HC238ADR2G

Product Overview

• Category: Integrated Circuit
• Use: Decoder/Demultiplexer
• Characteristics: High-Speed CMOS Logic, 3-to-8 Line Decoder/Demultiplexer
• Package: SOIC-16
• Essence: The MC74HC238ADR2G is a decoder/demultiplexer IC that converts a binary input into a corresponding output line. It is designed to be used in various digital applications where decoding or demultiplexing is required.
• Packaging/Quantity: The MC74HC238ADR2G is available in a standard SOIC-16 package and is typically sold in reels of 2500 units.

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: -40°C to +85°C
• Propagation Delay: 15ns (typical)
• Output Current: ±25mA

Pin Configuration

The MC74HC238ADR2G has a total of 16 pins arranged as follows:

__ __ A0 |1 \__/ 16| VCC A1 |2 15| Y0 A2 |3 14| Y1 GND |4 13| Y2 E1 |5 12| Y3 E2 |6 HC 11| Y4 E3 |7 238 10| Y5 Y7 |8 9| Y6 -- --

Functional Features

• Converts a 3-bit binary input to one of the eight output lines (Y0-Y7).
• Can be used as a decoder or demultiplexer depending on the configuration.
• 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: - Fast propagation delay ensures quick response in decoding/demultiplexing operations. - Low power consumption makes it suitable for battery-powered devices. - Versatile functionality allows for multiple applications. - Wide operating voltage range provides flexibility in system integration.

Disadvantages: - Limited number of output lines (8) may not be sufficient for certain complex applications. - Requires careful handling during installation due to its small package size.

Working Principles

The MC74HC238ADR2G operates based on the principles of digital logic. It takes a 3-bit binary input (A0, A1, A2) and decodes it into one of the eight output lines (Y0-Y7). The enable pins (E1, E2, E3) control the operation mode, allowing the IC to function as either a decoder or a demultiplexer.

When used as a decoder, the selected output line is determined by the binary input. For example, if the input is "010," the third output line (Y2) will be activated. In demultiplexer mode, the selected output line receives the input signal applied to the corresponding enable pin.

Detailed Application Field Plans

The MC74HC238ADR2G finds applications in various digital systems where decoding or demultiplexing is required. Some common application fields include:

1. Address Decoding: Used in microcontrollers and memory systems to decode address signals and select specific memory locations.
2. Data Routing: Enables data transmission to specific output lines based on the input signal, commonly used in communication systems.
3. Display Multiplexing: Controls multiplexed displays by selecting individual segments or digits based on the input binary code.
4. Data Distribution: Distributes data from a single source to multiple destinations based on the input code, often used in data acquisition systems.

Detailed and Complete Alternative Models

1. SN74HC238N: Similar 3-to-8 line decoder/demultiplexer IC from Texas Instruments.
2. CD74HC238E: Equivalent CMOS logic decoder/demultiplexer from ON Semiconductor.
3. 74HCT238: High-speed CMOS version of the decoder/demultiplexer IC from NXP Semiconductors.

These alternative models offer similar functionality and can be considered as substitutes for the MC74HC238ADR2G depending on specific requirements and availability.

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