PCA9532PW,118

The PCA9532PW,118 from NXP Semiconductors is a 16-bit I2C-bus and SMBus I/O expander designed for precise LED dimming. It supports 256 discrete brightness steps, making it ideal for Red/Green/Blue (RGB) color mixing and backlighting applications.

This device features an internal oscillator with two user-programmable blink rates and duty cycles, allowing for controlled LED brightness variation. The open-drain outputs can directly drive LEDs with a maximum sink current of 25 mA per bit. Unused I/O bits can function as General Purpose Parallel Input/Output (GPIO) for additional system control.

With an operating voltage range of 2.3 V to 5.5 V and a clock frequency up to 400 kHz, the PCA9532PW,118 is suitable for various embedded systems. It includes features like an active LOW reset pin, Power-On Reset (POR), and noise filters on SCL/SDA inputs for robust operation. The 24-TSSOP package is designed for surface mounting.

Key specifications include 16 LED drivers, programmable blink rates between 0.591 Hz and 152 Hz, and a maximum output sink current of 25 mA per bit. The device also supports hot insertion and has controlled edge rates to minimize ground bounce.