onsemi Interface - I/O Expanders PCA9654EDR2G

The PCA9654EDR2G is an 8-bit I/O expander designed for I2C and SMBus applications, providing a flexible solution for GPIO expansion. It features eight configurable I/O pins that can be set as either inputs or outputs, with the ability to invert the polarity of the input register. The device supports a wide operating voltage range from 1.65 V to 5.5 V and can handle a sink current of up to 30 mA on the SDA line. The PCA9654EDR2G includes an active-low interrupt output that signals when an input state changes, enhancing responsiveness in applications. It allows for up to 64 devices to be connected on the same I2C bus through three address pins. The device supports various I2C clock frequencies, including standard mode at 100 kHz, fast mode at 400 kHz, and fast mode+ at 1 MHz. Additionally, it is designed with low standby current and includes noise filtering on the SCL/SDA inputs. The PCA9654EDR2G is available in a SOIC-16 package and is compliant with RoHS standards, being both Pb-free and halogen-free. This makes it suitable for a range of applications requiring reliable GPIO expansion with minimal power consumption.