STMPE1801BJR - STMicroelectronics

The STMPE1801BJR from STMicroelectronics is a state-of-the-art port expander IC that offers a multitude of features designed to enhance the functionality and performance of embedded systems. This integrated circuit is particularly suitable for applications that require additional I/O ports, such as smartphones, personal media players, and other portable electronic devices.

The STMPE1801BJR provides 18 GPIO (General Purpose Input/Output) ports, which can be individually programmed to either input or output. This flexibility allows designers to expand the number of I/O lines available on a microcontroller or processor, enabling the connection of multiple peripherals and sensors without the need for a larger, more expensive microcontroller.

This port expander operates over an I2C serial interface, supporting both fast (400 kHz) and high-speed (1 MHz) modes, thereby ensuring compatibility with a wide range of microcontrollers. The I2C interface also allows for easy cascading of multiple STMPE1801BJR devices on the same bus, providing even more expandability options.

The device features an integrated keypad scanning engine which supports up to 8x8 key matrix, making it an ideal choice for applications with keypads or keyboards. This feature simplifies the design and reduces the processing load on the host microcontroller, as the STMPE1801BJR can manage the keypad scanning independently.

Additional features of the STMPE1801BJR include robust ESD protection, ensuring the device's reliability and longevity in demanding environments. It also has an adjustable interrupt output that can be configured to alert the host microcontroller of input changes, further enhancing the system's responsiveness and efficiency.

The STMPE1801BJR comes in a compact QFN-28 package, which is well-suited for space-constrained applications. Its operating temperature range from -40°C to +85°C guarantees stable operation across various environmental conditions. With its combination of features, the STMPE1801BJR is a versatile and powerful solution for expanding I/O capabilities in a wide range of electronic products.