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PCA9532
Datasheet
General description
The PCA9532 is a 16-bit I2C-bus 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 PCA9532 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 set-up 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 seconds. The open drain outputs directly drive the LEDs with maximum output sink current of 25 mA per bit and 200 mA per package (100 mA per octal).
To blink LEDs at periods greater than 1.69 seconds 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 PCF8575 or PCA9555. 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.
The active-LOW hardware reset pin (RESET) and Power-On Reset (POR) initializes the registers to their default state, all zeroes, causing the bits to be set HIGH (LED off).
Three hardware address pins on the PCA9532 allow eight devices to operate on the same bus.
Features
- 16 LED drivers (on, off, flashing at a programmable rate)
- 2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.591 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-bus interface logic compatible with SMBus
- Internal power-on reset
- Noise filter on SCL/SDA inputs
- Active-LOW reset input
- 16 open drain outputs directly drive LEDs to 25 mA
- Controlled edge rates to minimize ground bounce
- 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 kHz 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: SO24, TSSOP24, HVQFN24
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCA9532BS | PCA9532BS-T | 9352 728 39118 | Volume production | SOT616-1
(HVQFN24) | Reel Pack, SMD, 13" | Standard Marking | PCA9532BS
| Always Pb-free |
| PCA9532D | PCA9532D | 9352 728 38112 | Volume production | SOT137-1
(SO24) | Tube | Standard Marking | PCA9532D
| week 5, 2005 |
| PCA9532D | PCA9532D-T | 9352 728 38118 | Volume production | SOT137-1
(SO24) | Reel Pack, SMD, 13" | Standard Marking | PCA9532D
| week 5, 2005 |
| PCA9532PW | PCA9532PW | 9352 728 37112 | Volume production | SOT355-1
(TSSOP24) | Tube | Standard Marking | PCA9532PW
| week 12, 2005 |
| PCA9532PW | PCA9532PW-T | 9352 728 37118 | Volume production | SOT355-1
(TSSOP24) | Reel Pack, SMD, 13" | Standard Marking | PCA9532PW
| week 12, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| PCA9532BS | 9352 728 39118 | 1.2500 | NA | DIGI-KEY CORPORATION | 6,000 | 6/29/2008 | Buy online | Order samples |
| NA | AVNET ELECTRONICS MARKETING | 6,000 | 7/4/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 1,488 | 6/29/2008 | Buy online | ||||
| PCA9532D | 9352 728 38112 | 1.2500 | NA | DIGI-KEY CORPORATION | 1,351 | 6/29/2008 | Buy online | not available |
| NA | AVNET ELECTRONICS MARKETING | 750 | 7/4/2008 | Buy online | ||||
| NA | FUTURE ELECTRONICS | 636 | 7/4/2008 | Buy online | ||||
| PCA9532D | 9352 728 38118 | 1.2500 | NA | MOUSER ELECTRONICS | 1,978 | 7/5/2008 | Buy online | Order samples |
| NA | AVNET ELECTRONICS MARKETING | 1,000 | 7/4/2008 | Buy online | ||||
| PCA9532PW | 9352 728 37112 | 1.2500 | NA | AVNET ELECTRONICS MARKETING | 2,840 | 7/4/2008 | Buy online | Order samples |
| NA | DIGI-KEY CORPORATION | 1,323 | 6/29/2008 | Buy online | ||||
| NA | ARROW ELECTRONICS | 809 | 7/4/2008 | Buy online | ||||
| PCA9532PW | 9352 728 37118 | 1.4900 | NA | MOUSER ELECTRONICS | 2,284 | 7/5/2008 | Buy online | not available |
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
AN10216_1;
I2C manual (27-Mar-03)
AN264;
I2C Devices for LED Display Control (22-Jul-02)
Support Documents
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)
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) | Reset input pin |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA9532BS | SOT616-1
(HVQFN24) | -40~85 | 2 (160 Hz to 1.6 sec) | 16 | 400 | 2.3~5.5 | 25 | 8 | 200 | yes |
| PCA9532D | SOT137-1
(SO24) | -40~85 | 2 (160 Hz to 1.6 sec) | 16 | 400 | 2.3~5.5 | 25 | 8 | 200 | yes |
| PCA9532PW | SOT355-1
(TSSOP24) | -40~85 | 2 (160 Hz to 1.6 sec) | 16 | 400 | 2.3~5.5 | 25 | 8 | 200 | yes |
Similar products
PCA9532 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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