M74HC238B1R

Product Overview

• Category: Integrated Circuit
• Use: Decoder/Demultiplexer
• Characteristics: High-Speed, 3-to-8 Line Decoder/Demultiplexer
• Package: SO-16
• Essence: The M74HC238B1R is a decoder/demultiplexer IC that converts a binary input into one of eight outputs.
• Packaging/Quantity: Available in tape and reel packaging with 2500 units per 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: -40°C to +125°C
• Propagation Delay Time: 13 ns (typical)
• Quiescent Current: 4 µA (maximum)

Detailed Pin Configuration

The M74HC238B1R has a total of 16 pins arranged as follows:

+---+--+---+ A0 ---|1 +--+ 16|--- VCC A1 ---|2 15|--- A2 A2 ---|3 14|--- GND E1 ---|4 13|--- Y0 E2 ---|5 M74HC 12|--- Y1 E3 ---|6 238B1R 11|--- Y2 Y7 ---|7 10|--- Y3 Y6 ---|8 9|--- Y4 +----------+

Functional Features

• Converts a 3-bit binary input into one of eight outputs.
• High-speed operation with a typical propagation delay of 13 ns.
• Low quiescent current consumption, making it suitable for low-power applications.
• Wide operating voltage range allows compatibility with various systems.

Advantages

• Compact and space-saving SO-16 package.
• High-speed operation enables quick response in decoding applications.
• Low power consumption makes it suitable for battery-powered devices.
• Wide operating temperature range ensures reliable performance in extreme conditions.

Disadvantages

• Limited to 3-bit binary inputs, restricting the number of possible output combinations.
• Requires external pull-up resistors for proper operation.
• Not suitable for applications requiring higher decoding capabilities.

Working Principles

The M74HC238B1R operates based on the principle of binary decoding. It takes a 3-bit binary input and activates one of the eight output lines based on the input combination. The decoder/demultiplexer uses internal logic gates to decode the binary input and generate the corresponding output signal.

Detailed Application Field Plans

The M74HC238B1R is commonly used in various digital systems where decoding or demultiplexing is required. Some specific application fields include:

1. Address decoding in microcontrollers and microprocessors.
2. Memory selection in RAM and ROM modules.
3. Data routing in multiplexed data buses.
4. Signal decoding in communication systems.
5. Control signal generation in industrial automation.

Detailed and Complete Alternative Models

1. SN74LS138: Similar 3-to-8 line decoder/demultiplexer IC from Texas Instruments.
2. CD74HC238: High-speed CMOS 3-to-8 line decoder/demultiplexer from Texas Instruments.
3. MC14538B: Dual 1-of-4 decoder/demultiplexer IC from ON Semiconductor.

These alternative models offer similar functionality and can be used as substitutes for the M74HC238B1R in various applications.

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