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NXP Semiconductors
PCA9533
4-bit I 2 C-bus LED dimmer
4. Block diagram
PCA9533
INPUT
REGISTER
SCL
SDA
INPUT
FILTERS
I 2 C-BUS
CONTROL
LED SELECT (LSn)
REGISTER
0
V DD
POWER-ON
RESET
PRESCALER 0
PWM0
1
BLINK0
LEDn
REGISTER
REGISTER
OSCILLATOR
PRESCALER 1
REGISTER
PWM1
REGISTER
BLINK1
V SS
002aae626
Remark: Only one I/O shown for clarity.
Fig 1.
Block diagram of PCA9533
5. Pinning information
5.1 Pinning
PCA9533D/01
PCA9533D/02
PCA9533DP/01
PCA9533DP/02
LED0
LED1
LED2
V SS
1
2
3
4
8
7
6
5
V DD
SDA
SCL
LED3
LED0
LED1
LED2
V SS
1
2
3
4
8
7
6
5
V DD
SDA
SCL
LED3
002aae624
002aae625
Fig 2.
Pin con?guration for SO8
Fig 3.
Pin con?guration for TSSOP8
5.2 Pin description
Table 3.
Pin description
PCA9533_3
Symbol
LED0
LED1
LED2
V SS
LED3
Pin
1
2
3
4
5
Description
LED driver 0
LED driver 1
LED driver 2
supply ground
LED driver 3
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 April 2009
3 of 24
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