ON Semiconductor PCA9654EDR2G Overview

The ON Semiconductor PCA9654EDR2G is a high-performance, low-voltage 16-bit General Purpose Input/Output (GPIO) expander with an I²C-bus/SMBus interface. This robust component is designed to provide easy serial expansion of I/O through a standard two-wire bidirectional bus. The PCA9654EDR2G is ideal for applications where I/O pins are limited and additional inputs/outputs are necessary, such as in microcontrollers, embedded systems, and mobile devices.

Key Features

• Interface: I²C-bus/SMBus compatible interface supports up to 400 kHz (Fast-mode) and 100 kHz (Standard-mode) operation.
• Voltage Range: Operates from a power supply voltage ranging from 2.3V to 5.5V, making it suitable for a variety of logic levels and power requirements.
• GPIO Expansion: Provides an additional 16 GPIOs which can be configured as inputs or outputs.
• Output Drive Capability: Open-drain interrupt output.
• Packaging: Comes in a compact, surface-mount TSSOP-24 package, saving valuable board space.
• Power Saving: Features a low standby current, which is crucial for battery-powered devices to extend battery life.
• Robustness: Equipped with built-in power-on reset and a low-power mode to enhance system reliability.
• Addressing: Supports up to eight programmable slave addresses, allowing multiple devices to share the same I²C-bus/SMBus.

Applications

The PCA9654EDR2G is versatile and can be used in a wide array of applications, including but not limited to:

• Server motherboards
• Embedded systems
• Industrial control
• Portable devices
• Medical equipment
• Home automation

Conclusion

The ON Semiconductor PCA9654EDR2G is a sophisticated GPIO expander that delivers high functionality and adaptability for a range of electronics projects and products. Its compatibility with I²C-bus/SMBus interfaces, low power consumption, and flexibility in voltage ranges make it an excellent choice for expanding the I/O capabilities of a system without the need for additional microcontroller pins.