PCA9551PW,112 NXP Semiconductors, PCA9551PW,112 Datasheet - Page 4

• Manufacturer Part Number: PCA9551PW,112
• Description: IC LED DRIVER BLINKER 16-TSSOP
• Manufacturer: NXP Semiconductors
• Type: LED Blinkerr

Specifications of PCA9551PW,112

• Package / Case: 16-TSSOP
• 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: 6.5 mA
• Operating Supply Voltage: 2.3 V to 5.5 V
• 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: 568-1048-5; 935271692112; PCA9551PW

NXP Semiconductors
6. Functional description
PCA9551_8
Product data sheet
6.1 Device address
6.2 Control register
Table 2.
[1]
Refer to
Following a START condition, the bus master must output the address of the slave it is
accessing. The address of the PCA9551 is shown in
internal pull-up resistors are incorporated on the hardware selectable address pins and
they must be pulled HIGH or LOW.
The last bit of the address byte defines the operation to be performed. When set to logic 1
a read is selected, while a logic 0 selects a write operation.
Following the successful acknowledgement of the slave address, the bus master will send
a byte to the PCA9551, which will be stored in the Control register.
The lowest 3 bits are used as a pointer to determine which register will be accessed.
Symbol
LED7
RESET
SCL
SDA
V
Fig 5.
Fig 6.
DD
HVQFN16 package die supply ground is connected to both V
be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board
level performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad
on the board and for proper heat conduction through the board, thermal vias need to be incorporated in the
PCB in the thermal pad region.
Figure 1 “Block diagram of
PCA9551 slave address
Reset state: 00h
Control register
Pin
SO16, TSSOP16
12
13
14
15
16
Pin description
Rev. 08 — 31 July 2008
…continued
HVQFN16
10
11
12
13
14
Auto-Increment flag
8-bit I
1
0
1
0
fixed
PCA9551”.
2
C-bus LED driver with programmable blink rates
slave address
0
0
AI
Description
LED driver 7
reset input (active LOW)
serial clock line
serial data line
supply voltage
0
A2
0
selectable
hardware
register address
A1
B2
SS
Figure
A0 R/W
B1
002aac505
002aac506
pin and exposed center pad. V
B0
5. To conserve power, no
PCA9551
© NXP B.V. 2008. All rights reserved.
SS
pin must
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