DESCRIPTION

The PCA9551 LED Blinker blinks LEDs in I2C-bus and SMBus applications where it is necessary to limit bus traffic or free up the I2 C Master’s (MCU, MPU, DSP, chipset, etc.) timer. The uniqueness of this device is the internal oscillator with two programmable blink rates.

FEATURES

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

?2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.148 Hz and 38 Hz (6.74 and 0.026 seconds)

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

?Internal oscillator requires no external components

?I2C-bus interface logic compatible with SMBus

?Internal power-on reset

?Noise filter on SCL/SDA inputs

?Active-LOW reset input

?8 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 JESDEC Standard JESD78 which exceeds 100 mA

?Packages offered: SO16, TSSOP16, HVQFN16