PCA9553
Overview
The PCA9553 LED blinker blinks LEDs in I2C-bus and SMBus applications where it is necessary to limit bus traffic or free up the I2C-bus master's (MCU, MPU, DSP, chip set, etc.) timer. The uniqueness of this device is the internal oscillator with two programmable blink rates.
- 172 Hz and 44 Hz (5.82 seconds and 0.023 seconds) I Input/outputs not used as LED drivers can be used as regular GPIOs I Internal oscillator requires no external components I I2C-bus interface logic compatible with SMBus I Internal power-on reset I Noise filter on SCL/SDA inputs I 4 open-drain outputs directly drive LEDs to 25 mA I Controlled edge rates to minimize
