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PCA9553 Datasheet 4-bit I2c Led Driver

Manufacturer: NXP Semiconductors

Overview: PCA9553 4-bit I2C-bus LED driver with programmable blink rates Rev. 06 — 29 December 2008 Product data sheet 1.

General Description

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.

To blink LEDs using normal I/O expanders like the PCF8574 or PCA9554, the bus master must send repeated mands to turn the LED on and off.

Key Features

  • I 4 LED drivers (on, off, flashing at a programmable rate) I 2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.172 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.

More Datasheets from NXP Semiconductors

Part Number Description
PCA9550 2-bit I2C LED driver
PCA9551 8-bit I2C LED driver
PCA9552 16-bit I2C LED driver
PCA9554 8-bit I2C and SMBus I/O port
PCA9554A 8-bit I2C and SMBus I/O port
PCA9555 16-bit I2C-bus and SMBus I/O port
PCA9555A Low-voltage 16-bit I2C-bus I/O port
PCA9556 Octal SMBus Registered Interface
PCA9557 8-bit I2C and SMBus I/0 port with reset
PCA9559 5-bit multiplexed/1-bit latched 6-bit I2C EEPROM

PCA9553 Distributor