PCA9552 Description
The PCA9552 LED blinker blinks LEDs in I2C-bus and SMBus applications where it is necessary to limit bus traffic or free up the I2C-bus controller's (MCU, MPU, DSP, chip set, etc.) timer. The uniqueness of this device is the internal oscillator with two programmable blink rates. To blink LEDs using normal I/O expanders like the PCF8574 or PCA9554, the bus controller must send repeated mands to turn the LED on and...
PCA9552 Key Features
- 16 LED drivers (on, off, flashing at a programmable rate)
- 2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.172 Hz and 44 Hz (5.82
- Input/outputs not used as LED drivers can be used as regular GPIOs
- Internal oscillator requires no external ponents
- I2C-bus interface logic patible with SMBus
- Internal power-on reset
- Noise filter on SCL/SDA inputs
- Active LOW reset input
- 16 open-drain outputs directly drive LEDs to 25 mA
- Edge rate control on outputs