PCA9517DGKRG4

Product Overview

Category: Integrated Circuit (IC)

Use: Level shifting and translating between different voltage levels in I2C bus applications.

Characteristics: - Bidirectional voltage level translation - Supports I2C bus speeds up to 400 kHz - Compatible with both 3.3V and 5V systems - Low standby current consumption - ESD protection on all pins

Package: DGK (8-pin VSSOP)

Essence: The PCA9517DGKRG4 is a level translator IC designed specifically for I2C bus applications, allowing communication between devices operating at different voltage levels.

Packaging/Quantity: The PCA9517DGKRG4 is available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Standby Current: 1µA (typical)
• Maximum Data Rate: 400 kHz
• Number of Channels: 2

Pin Configuration

The PCA9517DGKRG4 has a total of 8 pins arranged as follows:

┌───┬───┐ │1 8│ VCC │2 7│ SDA1 │3 6│ SCL1 │4 5│ GND └───┴───┘

Functional Features

• Bidirectional voltage level translation between two I2C buses operating at different voltage levels.
• Automatic direction sensing and control.
• Provides bidirectional buffering, ensuring minimal loading and distortion on the bus lines.
• Supports multiple devices on each I2C bus segment.

Advantages

• Simplifies interfacing between devices operating at different voltage levels in I2C bus applications.
• Compatible with a wide range of supply voltages, making it versatile for various systems.
• Low standby current consumption helps conserve power in battery-powered applications.
• ESD protection on all pins ensures robustness and reliability.

Disadvantages

• Limited to I2C bus applications and not suitable for other communication protocols.
• May introduce slight delays in data transmission due to level translation process.

Working Principles

The PCA9517DGKRG4 utilizes a bidirectional voltage level shifting technique to enable communication between I2C devices operating at different voltage levels. It automatically detects the direction of data flow and adjusts the voltage levels accordingly. The device acts as a buffer, isolating the two I2C buses and minimizing loading effects.

Detailed Application Field Plans

The PCA9517DGKRG4 is commonly used in various applications where level shifting is required in I2C bus communication. Some specific application fields include:

1. Embedded Systems: Used to interface microcontrollers operating at different voltage levels with I2C peripherals.
2. Industrial Automation: Enables communication between sensors, actuators, and control units operating at different voltage levels.
3. Consumer Electronics: Facilitates interconnection between devices such as smartphones, tablets, and display modules with varying voltage requirements.

Alternative Models

Here are some alternative models that provide similar functionality to the PCA9517DGKRG4:

1. PCA9306: Dual bidirectional I2C-bus and SMBus voltage-level translator.
2. TXB0108: 8-bit bidirectional voltage-level translator with automatic direction sensing.
3. SN74LVC4245A: Octal dual-supply translating transceiver with configurable voltage-level shifting.

These alternative models offer comparable features and can be considered based on specific application requirements.

In conclusion, the PCA9517DGKRG4 is a versatile level translator IC designed for I2C bus applications. Its bidirectional voltage level shifting capability, compatibility with multiple supply voltages, and low standby current consumption make it an ideal choice for various systems requiring communication between devices operating at different voltage levels.