CD74HC243M

Product Overview

• Category: Integrated Circuit
• Use: Logic Level Translator
• Characteristics: High-Speed, CMOS Technology
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Translates signals between different logic levels
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC (High-Speed CMOS)
• Number of Channels: 4
• Input Voltage Levels: TTL/CMOS Compatible
• Output Voltage Levels: TTL/CMOS Compatible
• Propagation Delay: 9 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The CD74HC243M has a 16-pin SOIC package with the following pin configuration:

1. A1 - Channel A Input
2. B1 - Channel B Input
3. Y1 - Channel A Output
4. GND - Ground
5. Y2 - Channel B Output
6. B2 - Channel B Input
7. A2 - Channel A Input

8. VCC - Supply Voltage

9. A3 - Channel A Input

10. B3 - Channel B Input
11. Y3 - Channel A Output
12. GND - Ground
13. Y4 - Channel B Output
14. B4 - Channel B Input
15. A4 - Channel A Input
16. VCC - Supply Voltage

Functional Features

• Translates logic level signals between two different voltage domains.
• Supports bidirectional translation between two channels.
• Provides non-inverting level shifting.

Advantages

• High-speed operation allows for efficient signal translation.
• CMOS technology offers low power consumption.
• Wide operating voltage range enables compatibility with various systems.
• Compact SOIC package allows for easy integration into circuit designs.

Disadvantages

• Limited number of channels (4) may not be sufficient for complex applications requiring more translation paths.
• Propagation delay of 9 ns may introduce timing issues in high-speed applications.

Working Principles

The CD74HC243M utilizes CMOS technology to perform logic level translation. It consists of a combination of MOSFETs and other electronic components that enable bidirectional signal translation between two different voltage domains. The inputs and outputs are TTL/CMOS compatible, allowing seamless integration with various digital systems.

Detailed Application Field Plans

The CD74HC243M is commonly used in applications where logic level translation is required. Some potential application fields include:

1. Microcontroller interfacing with different voltage peripherals.
2. Communication interfaces between devices operating at different logic levels.
3. Level shifting in mixed-voltage systems.
4. Signal translation in industrial automation systems.

Detailed Alternative Models

1. SN74LVC4245A: Octal Bus Transceiver with Voltage Translation
2. TXB0108: 8-Bit Bidirectional Voltage-Level Translator
3. PCA9306: Dual Bidirectional I2C-Bus and SMBus Voltage-Level Translator

These alternative models offer similar functionality and can be considered as alternatives to the CD74HC243M based on specific requirements and design constraints.

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