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PCA9530, PCA9533, PCA9531 & PCA9532
The PCA9530, PCA9533, PCA9531 and PCA9532 are I2C & SMBus I/O expanders optimized for dimming LEDs. Two user programmable blink rates allow dimming and blinking of LEDs without overloading the bus or tying up the I2C Master.
2, 4, 8 and 16-bit I2C and SMBus LED Dimmers with Reset
Pin Configurations
PCA9530
A0 1 LED0 2 LED1 3 VSS 4 16 VDD 15 SDA 14 SCL 13 RESET A0 1 A1 2 16 VDD 15 SDA
Semiconductors
PCA9531
A2 3 LED0 4 LED1 5
14 SCL 13 RESET 12 LED7 11 LED6 10 LED5 9 LED4
Description
The PCA9530, PCA9531, PCA9532 and PCA9533 dim LEDs in I2C and SMBus applications. Each LED may be dimmed at one of 256 brightness levels, on, off or flashing at one of two programmable rates without tying up the bus master or overloading the I2C bus.These devices are useful for LED backlighting, LED color mixing applications and LED status applications. The blink rate can vary between a period of 0.625 sec to 1.6 sec (160 Hz to 0.625 Hz) in 256 steps.The duty cycle is programmable in 256 steps. LEDs are dimmed by varying the duty cycle that changes the average current as the LEDs blink at 160 Hz. More information on the LED Blinkers and Dimmers can be found in Application Note AN264. Any bits that are not used for controlling the LEDs can be used for General Purpose Parallel Input/Output (GPIO) expansion. I/O expansion provides a simple solution when additional I/O is needed for sensors, pushbuttons, alarm monitoring, LEDs, fans, etc... Philips Semiconductors' GPIO devices are detailed in Application Note AN469. The 3 hardware pins (A0, A1, A2) on the PCA9531/32 allow up to 8 identical devices to share the same I2C/SMBus.The single hardware pin (A0) on the PCA9530 allows up to 2 identical devices on the same bus. Due to hardware pin limitations, the PCA9533 has no address pins and two version are offered, PCA9533-1 and PCA9533-2, with different fixed addresses so two 4-bit devices can be used on the same I2C bus. An external active low hardware reset pin (RESET) is provided on the PCA9530/31/32 to reset the registers to the default state should the bus lock up without having to cycle power to the equipment.
SLAVE ADDRESS
LED2 6
1
1
0
0
0
0
A0
R/W
LED3 7 VSS 8
FIXED
PROGRAMMABLE SLAVE ADDRESS
PCA9530
A0 1 A1 2 A2 3 LED0 4
24 VCC 23 SDA 22 SCL 21 RESET
1
1
0
0
A2
A1
A0
R/W
FIXED
PROGRAMMABLE
PCA9531
PCA9532
LED1 5 LED2 6 LED3 7 LED4 8 LED5 9 LED6 10 LED7 11 VSS 12
20 LED15 19 LED14 18 LED13 17 LED12 16 LED11 15 LED10 14 LED9 13 LED8
PCA9533
SLAVE ADDRESS 0 0 0 1
LED0 1 LED1 2 LED2 3 VSS 4
16 VDD 15 SDA 14 SCL 13 LED3
1
1
0
R/W
SLAVE ADDRESS FIXED 1 1 0 0 A2 A1 A0 R/W
PCA9533-1
SLAVE ADDRESS
FIXED
PROGRAMMABLE
PCA9532
1
1
0
0
0
1
1
R/W
Features/Benefits
* * * * * * * * * * *
FIXED
PCA9533-2
* * * * *
I2C and SMBus compatible Two User Programmable Blink Rates and Duty Cycles Blink rate between 0.625 sec and 1.6 sec (160 Hz to 0.656 Hz) Duty cycle between 0% and 99.6% 256 programmable brightness levels Internal oscillator is accurate to +/- 10% and requires no external components Open drain outputs can directly drive LEDs to a maximum of 25 mA sink per bit Maximum device limits of 50 mA for the PCA9530, 100 mA for the PCA9531/33 and 200 mA (100 mA per 8-bit group) for the PCA9532 Input/Output states readable via I2C/SMBus Any bit not used to drive an LED can be used as a normal GPIO Active low hardware reset (RESET) or Power On Reset (POR) initialize the registers to their default state, all zeroes, causing all the outputs to be off (PCA9533 does not have the reset operation) Low standby current (Istb) of 1.5 A max ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101 JESDEC Standard JESD78 Latch-up testing exceeds 100 mA Offered in SO (D),TSSOP (DP or PW) or HVQFN (BS) Manufactured in a high-volume CMOS process
Operating Characteristics
* * * * 2.3 V to 5.5 V operating voltage 5.5 V tolerant I/Os -40 C to 85 C operating temperature range 0 Hz to 400 kHz clock frequency
PCA9530, PCA9533, PCA9531 & PCA9532
2, 4, 8 and 16-bit I2C and SMBus LED Dimmers with Reset
w w w. s e m i c o n d u c t o r s . p h i l i p s . c o m
Block Diagram
A2 A1 A0
Typical Application
5V 3.3 V
INPUT REGISTER SCL SDA INPUT FILTERS PC BUS CONTROL LED SELECT (LSx) REGISTER
LEDs
VCC SDA SCL SDA SCL RESET LED0 LED1 LED2 LED3
0 1 POWER ON RESET PRESCALER 0 REGISTER PRESCALER 1 REGISTER PWM0 REGISTER PWM1 REGISTER BLINK0
VDD RESET
LEDs
LED4
BUS MASTER
BLINK1
A0 A1 A2 VSS
LED5 LED6
OSCILLATOR
GPIO
LED7
VSS Note: Only One I/D Shown for Clarity
PCA9551
The PCA9530/31/32/33 functional diagram and I/O schematic are identical except for the number of bits and address pins.
The LED Dimmers feature open drain outputs that sink 25 mA per bit with a maximum of 50 mA for the PCA9530, 100 mA for the PCA9531/33 and 200 mA (100 mA per 8-bit group) for the PCA9532. Any bits not used to control LEDs can be used as normal general purpose I/O bits.
Order Information
Package SO TSSOP HVQFN Container Tube T&R Tube T&R T&R PCA9530 PCA9530D PCA9530D-T -- PCA9530DP-T -- PCA9531 PCA9531D PCA9531D-T PCA9551PW PCA9531PW-T PCA9531BS-T PCA9532 PCA9532D PCA9532D-T PCA9532PW PCA9532PW-T PCA9532BS-T PCA9533-1 PCA9533-1D PCA9533-1D-T -- PCA9533-1DP-T -- PCA9533-2 PCA9533-2D PCA9533-2D-T -- PCA9533-2DP-T --
Philips Semiconductors
www.semiconductors.philips.com/logic/i2c
Purchase of Philips I2C components conveys a license under the Philips' patent to use the components in the I2C system provided the system conforms to the I2C specification defined by Philips.
Philips Semiconductors is a worldwide company with over 100 sales offices in more than 50 countries. For a complete up-to-date list of our sales offices please e-mail sales.addresses@www.semiconductors.philips.com. A complete list will be sent to you automatically. You can also visit our website http://www.semiconductors.philips.com/sales
(c) Koninklijke Philips Electronics N.V. 2002
All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Date of release: July 2002 document order number: 9397 750 10198
Published in U.S.A.

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