ON Semiconductor PCA9655EDTR2G Overview

The PCA9655EDTR2G is a high-performance, 16-bit I/O expander from ON Semiconductor, designed to provide a seamless and efficient interface for extending the input/output capabilities of microcontrollers and microprocessors over an I2C-bus interface. This versatile component is particularly ideal for applications where I/O pins are limited, and additional inputs or outputs are necessary for interfacing with buttons, switches, sensors, LEDs, displays, and other peripherals.

Key Features

• Extended I/O: Offers 16 additional I/O ports that can be configured as either inputs or outputs, providing flexibility for a wide range of applications.
• I2C Interface: Utilizes the popular I2C serial interface for communication, supporting both 400 kHz fast-mode and 100 kHz standard-mode operations.
• Interrupt Output: Includes an interrupt output which can be configured to reflect the status of the input ports, thereby reducing the need for constant polling by the host controller.
• High Drive Capability: Each I/O can sink or source up to 25 mA, allowing direct drive of LEDs or other low-power devices.
• Power Supply Range: Compatible with a wide power supply range from 2.3V to 5.5V, making it suitable for various logic levels and supply voltages.
• Power Saving Mode: Features a low-power standby mode for power-sensitive applications.
• Packaging: Available in a TSSOP package, the PCA9655EDTR2G is designed for space-efficient PCB layouts.

Applications

The PCA9655EDTR2G is an excellent choice for expanding the I/O capabilities in a broad array of applications, including:

• Servers and networking equipment
• Industrial control systems
• Home automation
• Consumer electronics
• Portable devices

With its robust set of features and ON Semiconductor's reputation for quality, the PCA9655EDTR2G is a go-to solution for designers looking to enhance their systems with additional I/O capacity without compromising on performance or power efficiency.