PCA9518DBT

Product Overview

The PCA9518DBT belongs to the category of I2C bus repeaters and level shifters. It is commonly used to extend the I2C bus and provide level shifting for mixed voltage systems. The device is known for its characteristics such as high-speed operation, low standby current, and compatibility with various voltage levels. The PCA9518DBT is typically available in a small package, making it suitable for space-constrained applications. It is an essential component for ensuring reliable communication between devices operating at different voltage levels.

Package and Quantity

The PCA9518DBT is usually offered in a small outline package (SO) and is available in tape and reel packaging. The quantity per reel may vary depending on the supplier.

Specifications

• Operating Voltage: 1.2V to 5.5V
• Maximum Frequency: 400 kHz
• Standby Current: 10 µA
• Package Type: SOIC

Detailed Pin Configuration

The PCA9518DBT has a total of 8 pins: 1. SDA - Serial Data Line 2. SCL - Serial Clock Line 3. OE - Output Enable 4. GND - Ground 5. A-side Voltage Level 6. B-side Voltage Level 7. VCC - Supply Voltage 8. NC - No Connection

Functional Features

• Bidirectional voltage-level translation
• Automatic direction sensing
• Supports standard-mode, fast-mode, and fast-mode plus I2C-bus devices
• Low standby current for power efficiency

Advantages and Disadvantages

Advantages

• Enables communication between devices with different voltage levels
• Automatic direction sensing simplifies system design
• Low standby current minimizes power consumption

Disadvantages

• Limited to a maximum frequency of 400 kHz
• May not be suitable for applications requiring higher speed operation

Working Principles

The PCA9518DBT operates by monitoring the direction of data flow on the I2C bus and providing bidirectional voltage-level translation as needed. When the OE pin is set to a logic low, the device is enabled, allowing the translation to occur based on the voltage levels present on the A-side and B-side pins.

Detailed Application Field Plans

The PCA9518DBT finds extensive application in scenarios where I2C communication is required between components operating at different voltage levels. Some common application fields include: - Mixed-voltage I2C systems in consumer electronics - Industrial automation and control systems - Automotive electronics for interfacing sensors and modules

Detailed and Complete Alternative Models

Some alternative models to the PCA9518DBT include: - PCA9306: Similar bidirectional I2C bus voltage-level translator with automatic direction sensing - TXS0108E: Eight-channel I2C and SMBus voltage-level translator with flexible voltage support

In conclusion, the PCA9518DBT serves as a crucial component for enabling seamless I2C communication in mixed-voltage systems. Its functional features, advantages, and application versatility make it a valuable asset in various electronic designs.

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