CD74HC238MT

Product Overview

Category

CD74HC238MT belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in digital electronics for decoding and demultiplexing applications.

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Compatibility with TTL inputs
• Output current capability: 4 mA at VCC = 5V

Package

CD74HC238MT is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of CD74HC238MT lies in its ability to decode and demultiplex signals, making it an essential component in various digital electronic systems.

Packaging/Quantity

CD74HC238MT is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay: 25 ns
• Maximum Quiescent Current: 4 μA

Detailed Pin Configuration

CD74HC238MT consists of 16 pins, each serving a specific function:

1. A0: Address input 0
2. A1: Address input 1
3. A2: Address input 2
4. GND: Ground
5. Y0: Output 0
6. Y1: Output 1
7. Y2: Output 2
8. Y3: Output 3
9. Y4: Output 4
10. Y5: Output 5
11. Y6: Output 6
12. Y7: Output 7
13. E1: Enable input 1
14. E2: Enable input 2
15. VCC: Supply voltage
16. NC: No connection

Functional Features

CD74HC238MT offers the following functional features:

• Decodes a 3-bit binary address to one of eight outputs
• Demultiplexes the selected output based on the address inputs
• Enables individual outputs using the enable inputs (E1 and E2)

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient signal processing
• Low power consumption helps conserve energy
• Wide operating voltage range enhances compatibility with different systems
• TTL compatibility simplifies integration with existing circuits
• Output current capability supports driving external components

Disadvantages

• Limited number of outputs (8) may restrict certain applications requiring more outputs
• Propagation delay of 25 ns may introduce timing constraints in high-speed applications

Working Principles

CD74HC238MT operates based on the principles of digital decoding and demultiplexing. It takes a 3-bit binary address as input and selects one of the eight outputs accordingly. The enable inputs (E1 and E2) control the activation of specific outputs. The IC's internal circuitry decodes the address inputs and routes the selected output to the corresponding pin.

Detailed Application Field Plans

CD74HC238MT finds applications in various fields, including but not limited to:

1. Address decoding in microcontrollers and microprocessors
2. Data routing in multiplexed display systems
3. Memory selection in memory-mapped I/O systems
4. Signal demultiplexing in communication systems
5. Control logic in digital circuit designs

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to CD74HC238MT are:

1. 74HC138: This is a widely used 3-to-8 line decoder/demultiplexer IC.
2. CD74HCT238: A variant of CD74HC238MT with TTL inputs and higher output current capability.
3. SN74LS138: Another popular 3-to-8 line decoder/demultiplexer IC with Schottky-clamped TTL inputs.

These alternative models can be considered based on specific requirements, compatibility, and availability.

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