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PCA9552 - 16-bit I2C LED driver

General 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.

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 seconds and 0.023 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.

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Other Datasheets by NXP Semiconductors

Part Number Description
PCA9550 2-bit I2C LED driver
PCA9551 8-bit I2C LED driver
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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PCA9552 16-bit I2C-bus LED driver with programmable blink rates Rev. 5.1 — 25 May 2023 Product data sheet 1 General 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 commands to turn the LED on and off. This greatly increases the amount of traffic on the I2C-bus and uses up one of the controller's timers.