PCA9535DBQR

The PCA9535DBQR is a 16-bit I²C-bus I/O port expander from NXP Semiconductors designed to interface with microcontrollers and other digital devices via I²C communication. It provides 16 additional GPIO pins, allowing for the expansion of I/O capabilities in applications where device pin count is limited.
The device features two programmable interrupt outputs, which facilitate efficient monitoring of input changes without polling. It supports a wide supply voltage range (2.3V to 5.5V), making it suitable for various applications in consumer electronics, automotive systems, and industrial control.
The PCA9535DBQR supports multiple I²C addresses, enabling the connection of multiple devices on the same bus, and includes a built-in power-on reset feature. Its compact QFN package allows for space-efficient designs. Overall, the PCA9535DBQR is ideal for applications needing additional GPIOs, such as LED control, sensor interfacing, and button inputs.

The PCA9535DBQR is a 16-bit I2C I/O port expander with the following key features:
1. 16 GPIO Pins: Provides 16 general-purpose input/output pins, configurable for input or output.
2. I2C Interface: Communicates with microcontrollers via I2C, allowing multiple devices on the same bus.
3. Interrupt Feature: Supports interrupt-driven input functionality, enabling efficient handling of input changes.
4. Programmable Pull-up Resistors: Built-in pull-up resistors can be configured for GPIO inputs.
5. Wide Operating Voltage Range: Operates from 2.3V to 5.5V, making it suitable for various applications.
6. Low Power Consumption: Consumes minimal power, supporting battery-operated devices.
7. Multiple Device Support: Up to eight devices can be connected on the same I2C bus using different addresses.
8. High-speed I2C Support: Supports fast-mode I2C speeds up to 1 MHz for quicker data exchange.
These features make the PCA9535DBQR ideal for expanding I/O capabilities in embedded systems, automation, and various electronic applications.

The PCA9535DBQR is packaged in a QFN (Quad Flat No-lead) format, specifically a 32-pin QFN with a 5mm x 5mm footprint.

The PCA9535DBQR is a 16-pin IC that functions as an I2C I/O port expander. It is designed to provide additional GPIO (General Purpose Input/Output) pins for microcontrollers via the I2C interface.
### Pin Count:
- 16 pins
### Key Functions:
1. I2C Interface: Supports standard I2C protocol for communication.
2. GPIOs: Expands I/O capabilities with 8 configurable pins (P0-P7) that can be set as inputs or outputs.
3. Interrupt Output: Provides an interrupt (INT) pin to signal when any input state changes, enabling efficient monitoring.
4. Power Supply: Operates from a supply voltage of 1.65V to 5.5V, making it versatile for different applications.
### Pin Configuration:
- Pins include I2C SDA, SCL, INT, and GPIOs, along with power and ground connections.
The PCA9535DBQR is suitable for applications requiring additional digital input/output lines, such as sensors, LEDs, and switches.

The PCA9535DBQR is manufactured by NXP Semiconductors. NXP is a global semiconductor company that specializes in designing and manufacturing various integrated circuits and system-on-chip solutions. They focus on automotive, industrial, mobile, and communication applications, providing products that enhance connectivity, safety, and efficiency in electronic devices. NXP's offerings include microcontrollers, processors, RF solutions, and interface devices, making it a significant player in the semiconductor industry. The PCA9535DBQR specifically is an I2C I/O port expander, designed to increase the number of input/output pins available to microcontrollers, commonly used in embedded systems and various electronic applications.

The PCA9535DBQR is a 16-bit I/O port expander used in various applications, including industrial automation, consumer electronics, and automotive systems. It enables additional input/output control via an I2C interface, making it suitable for LED control, button interfaces, and sensor data acquisition. Its flexibility allows for expansion of GPIOs in microcontroller-based systems, enhancing connectivity in devices like smart home gadgets and remote controls.

The PCA9535DBQR is a 16-bit I/O port expander with I2C interface. Equivalent products include the MCP23017 from Microchip, TCA9555 from Texas Instruments, and the PCF8575 from NXP. These alternatives offer similar functionality, varying in pin count, features, and I2C addressing. Always check specific electrical characteristics and package options for compatibility.