PCA9551D,112 NXP Semiconductors, PCA9551D,112 Datasheet - Page 7

• Manufacturer Part Number: PCA9551D,112
• Description: IC LED DRIVER BLINKER 16-SOIC
• Manufacturer: NXP Semiconductors
• Type: LED Blinkerr

Specifications of PCA9551D,112

• Package / Case: 16-SOIC (3.9mm Width)
• Topology: Open Drain, PWM
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: LED Blinker
• Frequency: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Low Level Output Current: 25 mA
• Operating Supply Voltage: 2.3 V to 5.5 V
• Maximum Supply Current: 500 uA
• Maximum Power Dissipation: 400 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: OM6285 - EVAL BOARD I2C-2002-1A568-4002 - DEMO BOARD I2C568-3615 - DEMO BOARD I2C
• Voltage - Output: -
• Efficiency: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-1047-5; 935271695112; PCA9551D

NXP Semiconductors
PCA9551_8
Product data sheet
6.3.6 LS0 to LS1 - LED selector registers
6.4 Pins used as GPIOs
6.5 Power-on reset
6.6 External RESET
The LSn LED select registers determine the source of the LED data.
Table 9.
Legend: * default value.
LED pins not used to control LEDs can be used as general purpose I/Os (GPIOs).
For use as input, set LEDn to high-impedance (01) and then read the pin state via the
Input register.
For use as output, connect external pull-up resistor to the pin and size it according to the
DC recommended operating characteristics. LEDn output pin is HIGH when the output is
programmed as high-impedance, and LOW when the output is programmed LOW through
the ‘LED selector’ register. The output can be pulse-width controlled when PWM0 or
PWM1 are used.
When power is applied to V
a reset condition until V
and the PCA9551 registers are initialized to their default states, all the outputs in the
OFF state. Thereafter, V
A reset can be accomplished by holding the RESET pin LOW for a minimum of t
PCA9551 registers and I
RESET input is once again HIGH.
This input requires a pull-up resistor to V
Register
LS0 - LED0 to LED3 selector
LS0
LS1 - LED4 to LED7 selector
LS1
00 = output is set LOW (LED on)
01 = output is set high-impedance (LED off; default)
10 = output blinks at PWM0 rate
11 = output blinks at PWM1 rate
LS0 to LS1 - LED selector registers bit description
Bit
7:6
5:4
3:2
1:0
7:6
5:4
3:2
1:0
Value
01*
01*
01*
01*
01*
01*
01*
01*
DD
Rev. 08 — 31 July 2008
DD
2
C-bus state machine will be held in their default states until the
has reached V
DD
must be lowered below 0.2 V to reset the device.
, an internal Power-On Reset (POR) holds the PCA9551 in
8-bit I
Description
LED3 selected
LED2 selected
LED1 selected
LED0 selected
LED7 selected
LED6 selected
LED5 selected
LED4 selected
2
C-bus LED driver with programmable blink rates
DD
POR
if no active connection is used.
. At that point, the reset condition is released
PCA9551
© NXP B.V. 2008. All rights reserved.
w(rst)
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. The