ONFXL6408UMX
Overview
The FXL6408UMX is an 8-bit I2C GPIO expander designed for low-voltage applications, operating between 1.65V and 4V. It provides a simple solution for expanding processor I/O ports while supporting bidirectional voltage translation between the I2C bus and the GPIO pins. This device includes a built-in power-on reset (POR) and an interrupt output to notify the host processor of input state changes.
Why Choose This Part
It offers ultra-low power consumption with a standby current of only 1.5uA, making it ideal for battery-powered designs. The compact 1.8mm x 2.6mm UMLP package saves significant PCB real estate compared to standard TSSOP expanders. Additionally, it supports I2C clock frequencies up to 400 kHz and includes configurable pull-up/pull-down resistors for every I/O.
Applications
Key Specifications
Getting Started
To integrate this device, connect the I2C SCL/SDA lines and provide a stable supply voltage between 1.65V and 4.0V. The device address is selectable via a hardware pin to avoid bus conflicts. Standard I2C libraries for 8-bit I/O expanders can be adapted by referencing the internal register map for direction and pull-up configuration.
