PCA9551PW - NXP

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

PCA9551PW
Manufacturer

NXP
ChipWorker Part#

CW135085764
Category

LED Driver, LED Display Driver
Package

TSSOP-16
Description

LED DRVR 8Segment 3.3V/5V 16Pin TSSOP
Documentation

Datasheet

PCA9551PW Global Supplier

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PCA9551PW Specifications

Attribute	Attribute Value

Part Number	PCA9551PW
Manufacturer	NXP
ChipWorker Part#	CW135085764
Category	LED Driver, LED Display Driver
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	16 Pin
Case/Package	TSSOP-16
Supply Voltage (DC)	5.50V (max)
Current Rating	25.0 mA
Number of Outputs	8 Output
Output Voltage	≤6.00 V
Number of Bits	8 Bit
Power Dissipation	400 mW
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Input Voltage	2.3V ~ 5.5V
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Size-Length	5.1 mm
Size-Width	4.5 mm
Size-Height	0.95 mm
Operating Temperature	-40℃ ~ 85℃
Product Lifecycle Status	Unknown
Packaging	Tube, Bulk
RoHS	RoHS Compliant
Lead-Free Status	Lead Free

Product Description

General description
The PCA9551 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 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 master"s timers. The PCA9551 LED blinker instead requires only the initial set-up command to program BLINK RATE 1 and BLINK RATE 2 (i.e., the frequency and duty cycle) for each individual output. From then on, only one command from the bus master is required to turn each individual open-drain output on, off, or to cycle at BLINK RATE 1 or BLINK RATE 2.
Features
8 LED drivers (on, off, flashing at a programmable rate)
2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.148 Hz and 38 Hz (6.74 seconds and 0.026 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 reset input
8 open-drain outputs directly drive LEDs to 25 mA
Edge rate control on outputs
Maximum output sink current is 25 mA per bit and 100 mA per package.

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