DESCRIPTION

The PCA9533 is a 4-bit I2C and SMBus I/O expander optimized for dimming LEDs in 256 discrete steps for Red/Green/Blue (RGB) color mixing and back light applications.

FEATURES

? 4 LED drivers (on, off, flashing at a programmable rate)

? 2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.591 Hz and 152 Hz (1.69 seconds and 6.58 milliseconds)

? 256 brightness steps

? Input/outputs not used as LED drivers can be used as regular GPIOs

? Internal oscillator requires no external components

? I2C interface logic compatible with SMBus

? Internal power-on reset

? Noise filter on SCL/SDA inputs

? 4 open drain outputs directly drive LEDs to 25 mA

? Edge rate control on outputs

? No glitch on power-up

? Supports hot insertion

? Low stand-by current

? Operating power supply voltage range of 2.3 V to 5.5 V

? 0 to 400 kHz clock frequency

? ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101

? Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

? Packages offered: SO8, TSSOP8 (MSOP8)