PCA9551BS,118 NXP Semiconductors, PCA9551BS,118 Datasheet - Page 4
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PCA9551BS,118
Manufacturer Part Number
PCA9551BS,118
Description
IC LED DRIVER BLINKER 16-HVQFN
Manufacturer
NXP Semiconductors
Type
LED Blinkerr
Datasheet
1.PCA9551BS118.pdf
(26 pages)
Specifications of PCA9551BS,118
Package / Case
16-VQFN Exposed Pad, 16-HVQFN, 16-SQFN, 16-DHVQFN
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 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
568-3388-2
935272240118
PCA9551BS-T
935272240118
PCA9551BS-T
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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