DESCRIPTION

The PCA9531 is an 8-bit I2C & SMBus I/O expander optimized for dimming LEDs in 256 discrete steps for Red/Green/Blue (RGB) color mixing and back light applications.

FEATURES

• Eight LED drivers (on, off, flashing at a programmable rate)

• Two selectable, fully programmable blink rates (frequency and duty cycle) between 0.625 and 160 Hz (1.6 and 6.25 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

• Active low reset input

• Eight 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

• Package offer: SO16, TSSOP16, HVQFN16