Onsemi PCA9535EMTTXG

The PCA9535EMTTXG is an I²C-bus I/O port expander that provides additional GPIO pins for microcontrollers and other digital circuits. It is designed to simplify the design of control systems where the number of required GPIO pins exceeds those available on the primary microcontroller. The device incorporates a 16-pin TSSOP package and is compliant with I2C standards, enabling easy integration into existing I2C applications. Functions: - I2C Interface: It communicates over the I2C bus, allowing multiple devices to be connected with different addresses. - GPIO Expansion: Offers 16 GPIO pins (8 inputs and 8 outputs), allowing for increased functionality in constrained systems. - Interrupt Handling: It supports a single interrupt output pin that can signal when the input state changes. - Configurable Pin States: GPIO pins can be configured as either inputs or outputs through registers. Applications: - Consumer Electronics: Used in remote controls, game consoles, and similar devices to increase the number of sensors or controls. - Industrial Automation: Acts as a GPIO expander in automation systems, where many control signals are required. - Robotics: Interfaces with sensors and actuators that require additional GPIO pins. - Smart Home Devices: Expands pin count for control and monitoring in smart home applications. Alternative Parts: - MCP23017: A 16-bit I/O expander that communicates via I²C, similar to the PCA9535. - TCA9555: Has 16 GPIOs and offers I²C communication, functioning similarly to the PCA9535 but might have different electrical characteristics. - PCF8575: Another option for I²C GPIO expansion that offers additional features. Embedded Modules: - Development Boards: Several platforms, like Arduino or Raspberry Pi, may offer compatible shields or modules using the PCA9535 or its alternatives, promoting effortless integration into projects. - Sensor Modules: Various sensor modules utilize I²C GPIO expanders to interface multiple sensors through a single data line. Related Q&A: 1. Q: What is the primary function of the PCA9535EMTTXG? - A: The PCA9535EMTTXG primarily functions as an I²C-bus GPIO port expander that increases available GPIO pins for microcontrollers, enabling more complex control systems. 2. Q: How does the PCA9535EMTTXG interface with a microcontroller? - A: It interfaces with a microcontroller over the I²C bus, allowing the microcontroller to read from and write to the GPIO pins through specific addresses on the I²C bus. 3. Q: Can the GPIO pins on the PCA9535EMTTXG be configured as inputs and outputs? - A: Yes, the GPIO pins can be configured individually as inputs or outputs by writing to the appropriate configuration registers. 4. Q: What types of applications can benefit from using the PCA9535EMTTXG? - A: Applications in consumer electronics, industrial automation, robotics, and smart home devices can benefit from the PCA9535EMTTXG by expanding the number of GPIOs available for sensor and control functions. 5. Q: Are there alternative ICs similar to the PCA9535EMTTXG? - A: Yes, alternatives include the MCP23017, TCA9555, and PCF8575, which also function as I²C GPIO expanders with varying specifications and capabilities.