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PCA9533
Datasheet
General description
The PCA9533 is a 4-bit I2C and SMBus I/O expander optimized for dimming LEDs in 256 discrete steps for Red/Green/Blue (RGB) color mixing and back light applications.
The PCA9533 contains an internal oscillator with two user programmable blink rates and duty cycles coupled to the output PWM. The LED brightness is controlled by setting the blink rate high enough (> 100 Hz) that the blinking cannot be seen and then using the duty cycle to vary the amount of time the LED is on and thus the average current through the LED.
The initial setup sequence programs the two blink rates/duty cycles for each individual PWM. From then on, only one command from the bus master is required to turn individual LEDs ON, OFF, BLINK RATE 1 or BLINK RATE 2. Based on the programmed frequency and duty cycle, BLINK RATE 1 and BLINK RATE 2 will cause the LEDs to appear at a different brightness or blink at periods up to 1.69 second. The open drain outputs directly drive the LEDs with maximum output sink current of 25 mA per bit and 100 mA per package.
To blink LEDs at periods greater than 1.69 second the bus master (MCU, MPU, DSP, chipset, etc.) must send repeated commands to turn the LED on and off as is currently done when using normal I/O Expanders like the Philips PCF8574 or PCA9554. Any bits not used for controlling the LEDs can be used for General Purpose Parallel Input/Output (GPIO) expansion which provides a simple solution when additional I/O is needed for ACPI power switches, sensors, pushbuttons, alarm monitoring, fans, etc.
Power-On Reset (POR) initializes the registers to their default state causing the bits to be set HIGH (LED off).
Due to pin limitations, the PCA9533 is not featured with hardware address pins. The PCA9533/01 and the PCA9533/02 have different fixed I2C addresses allowing operation of both on the same bus.
Features
- 4 LED drivers (on, off, flashing at a programmable rate)
- 2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.591 Hz and 152 Hz (1.69 seconds and 6.58 milliseconds)
- 256 brightness steps
- Input/outputs not used as LED drivers can be used as regular GPIOs
- Internal oscillator requires no external components
- I2C interface logic compatible with SMBus
- Internal power-on reset
- Noise filter on SCL/SDA inputs
- 4 open drain outputs directly drive LEDs to 25 mA
- Edge rate control on outputs
- No glitch on power-up
- Supports hot insertion
- Low stand-by current
- Operating power supply voltage range of 2.3 V to 5.5 V
- 0 to 400 kHz clock frequency
- ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
- Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
- Packages offered: SO8, TSSOP8 (MSOP8)
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCA9533D/01 | PCA9533D/01 | 9352 744 34112 | Volume production | SOT96-1
(SO8) | Tube | Standard Marking | PCA9533D/01
| week 5, 2005 |
| PCA9533D/01 | PCA9533D/01-T | 9352 744 34118 | Volume production | SOT96-1
(SO8) | Tape reel smd | Standard Marking | PCA9533D/01
| week 5, 2005 |
| PCA9533D/02 | PCA9533D/02 | 9352 744 36112 | Volume production | SOT96-1
(SO8) | Tube | Standard Marking | PCA9533D/02
| week 5, 2005 |
| PCA9533D/02 | PCA9533D/02-T | 9352 744 36118 | Volume production | SOT96-1
(SO8) | Tape reel smd | Standard Marking | PCA9533D/02
| week 5, 2005 |
| PCA9533DP/01 | PCA9533DP/01-T | 9352 744 35118 | Volume production | SOT505-1
(TSSOP8) | Reel Pack, SMD, 13" | Standard Marking | PCA9533DP/01
| week 12, 2005 |
| PCA9533DP/02 | PCA9533DP/02-T | 9352 744 37118 | Volume production | SOT505-1
(TSSOP8) | Reel Pack, SMD, 13" | Standard Marking | PCA9533DP/02
| week 12, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| PCA9533D/01 | 9352 744 34112 | 1.0200 | NA | DIGI-KEY CORPORATION | 1,602 | 10/9/2008 | Buy online | Order samples |
| NA | MOUSER ELECTRONICS | 100 | 10/9/2008 | Buy online | ||||
| PCA9533D/01 | 9352 744 34118 | 0.8700 | not available | |||||
| PCA9533D/02 | 9352 744 36112 | not available | ||||||
| PCA9533D/02 | 9352 744 36118 | Order samples | ||||||
| PCA9533DP/01 | 9352 744 35118 | 1.0200 | NA | DIGI-KEY CORPORATION | 5,000 | 10/9/2008 | Buy online | Order samples |
| NA | DIGI-KEY CORPORATION | 176 | 10/9/2008 | Buy online | ||||
| NA | FUTURE ELECTRONICS- NORTH AMER | 1,500 | 10/8/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 1,140 | 10/9/2008 | Buy online | ||||
| PCA9533DP/02 | 9352 744 37118 | Order samples |
Applications
Related applications
LCD display - discretes focus
PDA - discretes focus
Motherboard components
50-60 Hz CRT integrated DTV (TV210D)
Mid-range integrated DTV (TV810)
Intelligent washing machine
PCI analog/DVB-T stereo TV receiver
Nexperia GSM/GPRS/EDGE VAS system solution (61x0)
Nexperia UMA-enabled GSM/GPRS/EDGE VAS system solution (6100)
Transceiver board
Power amplifier board
Main CPU board
Cellular phone - MMS functionality
Set-top box - MMS functionality
Color mixing for RGBA LEDs
Technical documents
Application Notes
AN10315_1;
LED dimmer demoboard (11-Jan-05)
Support Documents
75016543;
An industry-leading portfolio of cost-effective, power-saving solutions for major home appliances (2008-06-01)
75013239;
I 2 C Logic Selection Guide (2005-01-12)
75011212;
I2C 2002-1A Evaluation Board Kit (01-Mar-03)
75012744;
I2C Bus Solutions 2004 (2004-02-01)
philips_i2c_handbook;
I2C Handbook (2004-01-01)
UM10204_3;
I2C-bus specification and user manual (26-Jun-07)
philips_i2c_logic_overview;
Interface Products Business Line Specialty Logic Product Line I2C Logic Family Overview (2004-01-01)
75013487;
LED dimmer demo board (2004-11-02)
75016189;
NXP I (2008-06-01)
75015692;
NXP LED dimmer demonstration board OM6279 (2006-11-01)
75010198;
PCA9530/9533/9531/9532 LED Dimmers (25-Sep-02)
75010654;
PCA9550/9551/9552 (01-Dec-01)
75015353;
PCA9633 - Better control of RGBA LEDs (01-Feb-06)
Parametrics/similar products
| Type number | Package | Operating temp.(Cel) | PWMs | # of Bits | I²C-bus(kHz) | Operating voltage(VDC) | Max Sink Current per bit(mA) | # of Addresses | Max Sink Current per package(mA) |
|---|---|---|---|---|---|---|---|---|---|
| PCA9533D/01 | SOT96-1
(SO8) | -40~85 | 2 (160 Hz to 1.6 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |
| PCA9533D/02 | SOT96-1
(SO8) | -40~85 | 2 (160 Hz to 1.6 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |
| PCA9533DP/01 | SOT505-1
(TSSOP8) | -40~85 | 2 (160 Hz to 1.6 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |
| PCA9533DP/02 | SOT505-1
(TSSOP8) | -40~85 | 2 (160 Hz to 1.6 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |
Similar products
PCA9533 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.
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