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Manufacturer Part #

PCA9552BS,118

BU 510 - SECURITY & CONNECTIVITY

Mfr. Name: NXP
Standard Pkg:
Product Variant Information section
Date Code:
Product Specification Section
Technical Attributes
Attributes Table
Supply Voltage: 2.3V to 5.5V
Output Current per Channel: 25mA
Package Style:  HVQFN-24
Mounting Method: Surface Mount
Features & Applications
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. Maximum output sink current is 25 mA per bit and 100 mA per package.

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
Pricing Section
Stock:
0
Minimum Order:
6,000
Multiple Of:
6,000
6,000
Factory Stock:Factory Stock:
0
Factory Lead Time:
7 Weeks
Total
$6,660.00
USD
Quantity
Web Price
6,000+
$1.11
Product Variant Information section