PCA9550 Datasheet - NXP

PCA9550, 2-bit I2C LED driver

PCA9550 2-bit I2C-bus LED driver with programmable blink rates Rev.05 * 13 October 2008 Product data sheet 1.General .
The PCA9550 LED blinker blinks LEDs in I2C-bus and SMBus applications where it is necessary to limit bus trafﬁc or free up the I2C master's (MCU, MPU,.

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Datasheet Details

Part number:

PCA9550

Manufacturer:

NXP ↗

File Size:

150.21 KB

Description:

2-bit I2C LED driver

Features

* I 2 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 second) I Input/output not used as LED drivers can be used as regular GPIOs I Internal oscillator requires no externa

Applications

* where it is necessary to limit bus trafﬁc or free up the I2C 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 repe

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PCA9550 2-bit I2C LED driver NXP

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