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
