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Onsemi PCA9654EDTR2G Environmental and export classification status description

The PCA9654EDTR2G is an I²C-bus I/O port expander that is aimed at extending the number of I/O pins available for microcontrollers. It offers additional GPIO (General Purpose Input/Output) pins and interfaces with the I²C protocol for easy integration into existing systems. Functions: - I²C Interface: The PCA9654EDTR2G connects via the I²C bus, typically allowing for multiple devices on the same two-wire bus. - GPIO Expansion: It provides several additional GPIO pins that can be configured as inputs or outputs, increasing the number of I/O capabilities. - Multiple Device Addressing: It supports multiple devices on the same I²C bus by providing unique configuration options for device addressing. - Interrupt Capability: The IC features an interrupt output that can signal the host microcontroller when the state of inputs changes. - Configurable I/O: The individual GPIO pins can be programmed for specific functions, including pull-up or pull-down resistors, depending on the requirements of the application. Applications: - Consumer Electronics: Used in devices that require additional I/O capabilities. - Industrial Automation and Control: Can be implemented in control systems where multiple signal inputs/outputs are required. - Embedded Systems: Suitable for microcontroller systems where GPIO expansion is needed. - IoT Devices: Useful in Internet of Things devices that require scaling of GPIO without significant additional cost. Alternative Parts: - MCP23017: A similar I²C GPIO expander with 16 I/O pins. - PCF8575: This part offers 16 I/O pins over I²C, with similar functionality. - TCA9535: Another GPIO expander providing 16 I/O pins with interrupt capability. - PCA9555: A 16-bit I²C I/O port expander as an alternative option. Embedded Modules: - Development Boards: Some development boards may include the PCA9654EDTR2G for passive learning and prototyping. - Microcontroller Kits: Available as part of microcontroller kits that allow easy interface and integration into projects requiring more I/O pins. Q&A: 1. Q: What is the primary function of the PCA9654EDTR2G? A: The PCA9654EDTR2G acts as an I²C-bus I/O port expander, providing additional GPIO pins to microcontrollers. 2. Q: How does the PCA9654EDTR2G communicate with other devices? A: It uses the I²C bus for communication, allowing multiple devices to be connected on the same bus using only two wires. 3. Q: Can the GPIO pins of the PCA9654EDTR2G be configured for input or output? A: Yes, the GPIO pins can be individually configured as either inputs or outputs based on application needs. 4. Q: What is the maximum number of PCA9654EDTR2G devices that can be connected on the same I²C bus? A: The maximum number depends on the unique address configuration, but multiple devices can be connected using different addresses, allowing efficient expansion. 5. Q: What applications commonly utilize the PCA9654EDTR2G? A: It is commonly used in consumer electronics, industrial automation, embedded systems, and IoT devices needing additional GPIO capabilities.