PCA9518APW,512

Product Overview

Category

The PCA9518APW,512 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used as a level translator and repeater for I2C-bus systems.

Characteristics

• The PCA9518APW,512 is designed to provide bidirectional voltage-level translation between low-voltage (down to 0.9V) and higher-voltage (up to 5.5V) I2C-bus or SMBus applications.
• It supports standard-mode, fast-mode, and fast-mode plus I2C-bus and SMBus protocols.
• This IC features a built-in voltage-level shifting function, allowing seamless communication between devices operating at different voltage levels.
• It provides buffering and isolation of bus capacitance, enhancing signal integrity and noise immunity.
• The PCA9518APW,512 is available in a small package, making it suitable for space-constrained applications.

Package and Quantity

The PCA9518APW,512 is packaged in a TSSOP (Thin Shrink Small Outline Package) with 20 pins. It is typically sold in reels containing 2500 units.

Specifications

• Supply Voltage: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Data Rate: 400 kbit/s (Fast-mode Plus)
• Maximum Capacitive Load: 400 pF
• Rise/Fall Time: 20 ns (maximum)

Pin Configuration

The PCA9518APW,512 has a total of 20 pins. The pin configuration is as follows:

Pin 1: SDA1 Pin 2: SCL1 Pin 3: EN Pin 4: GND Pin 5: VCC Pin 6: SDA2 Pin 7: SCL2 Pin 8: OE Pin 9: GND Pin 10: VCC Pin 11: SDA3 Pin 12: SCL3 Pin 13: OE Pin 14: GND Pin 15: VCC Pin 16: SDA4 Pin 17: SCL4 Pin 18: OE Pin 19: GND Pin 20: VCC

Functional Features

• Bidirectional voltage-level translation between low-voltage and higher-voltage I2C-bus or SMBus applications.
• Built-in voltage-level shifting function for seamless communication between devices operating at different voltage levels.
• Buffering and isolation of bus capacitance for improved signal integrity and noise immunity.
• Supports standard-mode, fast-mode, and fast-mode plus I2C-bus and SMBus protocols.

Advantages and Disadvantages

Advantages

• Enables easy integration of devices operating at different voltage levels within an I2C-bus system.
• Provides reliable voltage-level translation with minimal external components.
• Enhances signal integrity and noise immunity, ensuring robust communication.

Disadvantages

• Limited to I2C-bus and SMBus applications, not suitable for other communication protocols.
• May introduce additional propagation delay due to voltage-level translation.

Working Principles

The PCA9518APW,512 operates by monitoring the voltage levels on the SDA (Serial Data) and SCL (Serial Clock) lines of the I2C-bus. It automatically adjusts the voltage levels to match the requirements of the connected devices, allowing them to communicate seamlessly.

When a high-to-low transition is detected on any of the SDA lines, the PCA9518APW,512 pulls down the corresponding SCL line to ensure proper voltage-level translation. Similarly, when a low-to-high transition is detected on any of the SDA lines, the PCA9518APW,512 releases the corresponding SCL line.

This bidirectional voltage-level translation enables devices operating at different voltage levels to communicate effectively within an I2C-bus system.

Detailed Application Field Plans

The PCA9518APW,512 finds applications in various fields where voltage-level translation and buffering are required for I2C-bus or SMBus communication. Some specific application areas include:

1. Consumer Electronics: Used in smart TVs, set-top boxes, and audio/video equipment for interfacing with different voltage-level components.
2. Automotive: Enables communication between sensors, actuators, and control units operating at different voltage levels in automotive systems.
3. Industrial Automation: Facilitates communication between industrial sensors, controllers, and other devices in automation systems.
4. Medical Devices: Allows seamless integration of medical sensors, monitors, and control units operating at different voltage levels.
5. Internet of Things (IoT): Supports voltage-level translation in IoT devices, enabling connectivity and interoperability.

Alternative Models

• PCA