PCA9535PW

The PCA9535PW from Texas Instruments is a versatile 16-bit I2C-bus I/O expander designed for general-purpose input/output expansion applications. 

Key Features:

1. 16-Bit I/O Expansion: The PCA9535PW provides 16 I/O pins that can be individually configured as inputs or outputs, allowing for flexible expansion of I/O capabilities in microcontroller-based systems.
2. I2C-Bus Interface: The device features an I2C-bus interface, enabling seamless communication with microcontrollers, sensors, and other peripheral devices. This interface simplifies system integration and allows for easy control and configuration of the I/O pins.
3. Programmable Input/Output Configuration: Each I/O pin can be independently configured as either an input or output through software control. This flexibility enables dynamic reconfiguration of I/O pins based on application requirements.
4. Selectable I2C Slave Address: The PCA9535PW supports selectable I2C slave addresses, allowing multiple devices to coexist on the same I2C bus without address conflicts. This feature enables scalability and expandability in larger systems with multiple I/O expanders.
5. Interrupt Output: The device features an interrupt output (INT) that can be configured to alert the microcontroller of input state changes. This allows for efficient event-driven programming and minimizes the need for continuous polling of input states.
6. Low Standby Current: With low standby current consumption, the PCA9535PW minimizes power consumption in battery-powered applications and extends battery life in portable devices.
7. Wide Voltage Range: The device supports a wide voltage range (2.3V to 5.5V), making it compatible with a variety of microcontroller and system voltage levels. This compatibility enhances versatility and enables seamless integration into existing designs.

Applications:

• Keypad and push-button interfaces
• LED control and lighting applications
• Sensor interfaces
• Industrial automation and control systems
• Consumer electronics
• Automotive electronics

Overall, the PCA9535PW I/O expander from Texas Instruments offers flexible and versatile I/O expansion capabilities with an I2C-bus interface, making it an ideal solution for various embedded systems and electronic devices requiring additional input/output functionality.