PCA9517DG4

Product Overview

Category: Integrated Circuit (IC)

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

Characteristics: - Bidirectional voltage-level translator - Supports I2C Fast Mode Plus (Fm+) with speeds up to 1 MHz - Compatible with both 3.3V and 5V systems - Provides bidirectional buffering for SDA and SCL lines - Allows voltage translation from 1.8V to 5V and vice versa - Supports hot insertion - Low standby current consumption

Package: SOIC (Small Outline Integrated Circuit)

Essence: The PCA9517DG4 is an IC that facilitates level shifting and translating between different voltage levels in I2C bus applications. It allows devices operating at different voltage levels to communicate seamlessly on the same I2C bus.

Packaging/Quantity: The PCA9517DG4 is available in a standard SOIC package. The quantity per reel is typically 2500 units.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Data Rate: 1 MHz
• Standby Current: 10 µA (typical)
• Rise/Fall Time: 20 ns (maximum)

Pin Configuration

The PCA9517DG4 has a total of 8 pins, which are assigned specific functions as follows:

1. VCCA: Power supply input for side A (1.65V to 5.5V)
2. SDA1: Bi-directional data line for side A
3. SCL1: Bi-directional clock line for side A
4. GND: Ground connection
5. SCL2: Bi-directional clock line for side B
6. SDA2: Bi-directional data line for side B
7. VCCB: Power supply input for side B (1.65V to 5.5V)
8. OE: Output enable pin

Functional Features

• Bidirectional voltage-level translation between two I2C buses operating at different voltage levels.
• Automatic direction sensing and control of the I2C bus signals.
• Provides buffering and isolation between the two sides of the translator.
• Supports hot insertion, allowing devices to be connected or disconnected without disrupting the bus operation.

Advantages and Disadvantages

Advantages: - Enables communication between devices operating at different voltage levels on the same I2C bus. - Supports high-speed data transfer up to 1 MHz. - Low standby current consumption helps conserve power. - Easy to use with automatic direction sensing and control.

Disadvantages: - Limited to I2C bus applications and may not be suitable for other communication protocols. - Requires careful consideration of voltage level compatibility to avoid damage to connected devices.

Working Principles

The PCA9517DG4 utilizes a bidirectional voltage-level translation technique to allow devices operating at different voltage levels to communicate on the same I2C bus. It automatically senses the direction of the bus and adjusts the voltage levels accordingly. The device provides buffering and isolation to prevent any disruption caused by devices with different voltage requirements.

Detailed Application Field Plans

The PCA9517DG4 is commonly used in various applications where there is a need to interface devices operating at different voltage levels through an I2C bus. Some typical application fields include:

1. Embedded Systems: Allows communication between microcontrollers and peripheral devices operating at different voltage levels.
2. Industrial Automation: Facilitates connectivity between sensors, actuators, and control systems with varying voltage requirements.
3. Consumer Electronics: Enables interoperability between devices such as smartphones, tablets, and accessories with different voltage levels.
4. Automotive Electronics: Supports communication between various automotive modules and subsystems operating at different voltage levels.

Detailed and Complete Alternative Models

1. PCA9306: Similar bidirectional I2C bus voltage-level translator with automatic direction sensing.
2. TXB0108: Eight-channel bi-directional voltage-level translator for various communication protocols including I2C.
3. BSS138: Single-channel bi-directional voltage-level translator suitable for low-voltage applications.

These alternative models offer similar functionality to the PCA9517DG4 and can be considered based on specific requirements and compatibility with the target application.

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