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NXP Semiconductors PCA9533D/02,112
- Part No.:
- PCA9533D/02,112
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PCA9533D/02,112.pdf
- Description:
- IC LED DRVR LINEAR I2C 25MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,586
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Product details
Overview
PCA9533D/02 from NXP Semiconductors is a 4-bit I²C-bus LED dimmer IC with integrated oscillator, delivering 256-step PWM brightness control for RGB color mixing and backlighting. It features two independent programmable blink rates (0.591–152 Hz), 25 mA per output sink current, and operates from 2.3 V to 5.5 V supply. It is used in display backlight management and status indicator systems where compact, I²C-controlled LED dimming is required.
For engineers reviewing the PCA9533D/02 datasheet, PCA9533D/02 pinout, PCA9533D/02 application, or PCA9533D/02 equivalent, key selection criteria include its fixed I²C address (0xC6), open-drain LED driver outputs, dual PWM register architecture, GPIO reconfigurability of unused LED pins, and SO8 package compatibility with industrial temperature range (−40 °C to +85 °C).
Technical Context
The PCA9533D/02 implements an internal oscillator driving two independent PWM channels (BLINK0/BLINK1), each with dedicated prescaler (PSC0/PSC1) and duty-cycle (PWM0/PWM1) registers. Its LED selector register (LS0) maps each of four outputs to one of four states: high-impedance (off), active-low (on), BLINK0, or BLINK1 - enabling per-pin brightness or blink mode selection without host MCU intervention after initial setup.
It supports standard-mode and fast-mode I²C (up to 400 kHz), includes noise filtering on SCL/SDA, edge-rate control on outputs, and Power-On Reset (POR) that initializes all outputs HIGH (LED off). The device lacks hardware address pins; PCA9533D/02 uses fixed slave address 0xC6 (11000110), distinct from PCA9533D/01 (0xC4), allowing coexistence on the same bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Address | Fixed 7-bit address 0xC6 (1100011); enables multi-device I²C bus without address conflicts with PCA9533D/01 |
| PWM Resolution | 256-step duty cycle (0–255); enables precise LED brightness control via PWM0/PWM1 registers |
| Blink Frequency Range | 0.591 Hz to 152 Hz (1.69 s to 6.58 ms period); covers slow status indication and high-frequency flicker-free dimming |
| Output Sink Current | 25 mA per LED pin (max 100 mA total); directly drives LEDs without external drivers in low-power applications |
| Supply Voltage | 2.3 V to 5.5 V; compatible with 3.3 V and 5 V logic domains and mixed-voltage system designs |
| Operating Temperature | −40 °C to +85 °C; qualified for industrial-grade embedded and display subsystems |
| ESD Protection | 2000 V HBM, 150 V MM, 1000 V CDM; robust handling in automated assembly and field environments |
Pinout & Package
PCA9533D/02 is supplied in SO8 package (SOT96-1), 8-lead plastic small outline, 3.9 mm body width. Pin 1 is marked by notch or dot; pinout is identical for both PCA9533D/01 and PCA9533D/02 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED0 (Pin 1) | Open-drain LED driver output 0 | Sinks up to 25 mA; configured via LS0 register as off/on/BLINK0/BLINK1; usable as GPIO input/output when not driving LED |
| VDD (Pin 2) | Positive supply voltage | 2.3–5.5 V operation; powers internal oscillator, logic, and output drivers; decoupling capacitor recommended |
| LED1 (Pin 3) | Open-drain LED driver output 1 | Functionally identical to LED0; independently controllable for multi-color or multi-segment indicators |
| SDA (Pin 4) | I²C serial data line | Open-drain bidirectional interface; requires external pull-up; supports standard/fast-mode I²C up to 400 kHz |
| LED2 (Pin 5) | Open-drain LED driver output 2 | Same electrical and functional behavior as LED0/LED1; enables 3-channel RGB or 4-segment backlight control |
| SCL (Pin 6) | I²C serial clock line | Input-only clock signal; includes internal noise filter; synchronizes all I²C transactions |
| VSS (Pin 7) | Ground reference | 0 V return path for supply and I/O; must be low-impedance connection to minimize noise coupling |
| LED3 (Pin 8) | Open-drain LED driver output 3 | Final channel for full 4-bit expansion; supports independent PWM assignment and GPIO reuse |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM engines | Separate PSC0/PWM0 and PSC1/PWM1 registers allow simultaneous different blink rates and brightness levels per LED group |
| No external oscillator components | Internal RC oscillator eliminates need for crystals, capacitors, or resistors - reduces BOM count and board space |
| GPIO reconfigurability | Unused LEDn pins function as general-purpose inputs (with pull-up) or open-drain outputs - extends I/O without adding discrete logic |
| Hot-insertion support | Controlled power-up behavior and glitch-free POR ensure safe insertion into live I²C buses without bus contention |
| I²C/SMBus compatibility | Fully compliant with SMBus timeout, alert response, and protocol requirements - interoperable with system management controllers |
Applications
| RGB Status Indicator | Backlight Dimming |
|---|---|
Use Scenario: Embedded control panel with tri-color status LED indicating system health (green=OK, red=error, amber=warning) via software-controlled color mixing. IC Role / Device Role / Timing Role: PCA9533D/02 acts as I²C-addressable RGB LED driver, generating synchronized PWM signals for red, green, and blue LEDs using BLINK0 and BLINK1 registers. Use Value: Eliminates MCU PWM timer resource usage; enables smooth color transitions with 256-step resolution and consistent timing across all three channels. | Use Scenario: Small-format LCD display (e.g., industrial HMI, portable test equipment) requiring adjustable white LED backlight intensity. IC Role / Device Role / Timing Role: PCA9533D/02 serves as compact backlight controller, sinking current from 4 parallel white LEDs with shared or independent dimming profiles. Use Value: Reduces firmware overhead versus bit-banged GPIO control; provides flicker-free dimming above 100 Hz while maintaining <1 µA standby current. |
| ACPI Power Switch Interface | Fan Speed Monitoring & Control |
Use Scenario: Notebook or server motherboard implementing ACPI-compliant power button and lid switch detection with visual feedback. IC Role / Device Role / Timing Role: PCA9533D/02 provides GPIO inputs for mechanical switches and drives status LEDs, coordinated via single I²C transaction. Use Value: Integrates switch sensing and LED signaling in one 8-pin SOIC; avoids separate level translators or buffer ICs for 3.3 V/5 V mixed-signal interfaces. | Use Scenario: Industrial fan module with tachometer feedback and speed-indicating LED ring (e.g., 4-segment RPM bar graph). IC Role / Device Role / Timing Role: PCA9533D/02 reads tach pulses via GPIO input (LEDn in high-Z mode) and drives proportional LED segments using PWM0/BLINK1 mapping. Use Value: Enables real-time visual fan speed representation without dedicated analog circuitry or additional microcontroller pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED dimmer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCA6507PWR | 7-bit I²C address configurable via A0/A1 pins; 7-channel output; higher max sink current (25 mA per channel, 125 mA total); no internal oscillator - requires external clock or MCU-driven PWM | Supports more LEDs per device; better suited for multi-zone lighting; lacks autonomous blink modes - requires continuous MCU polling or interrupt-driven updates | Select TCA6507PWR when expanding beyond 4 channels or needing higher aggregate current; avoid if autonomous dual-PWM operation is required. |
| PCA9632DP | Same 4-channel architecture; enhanced features including 12-bit PWM (4096 steps), auto-increment registers, and improved ESD (4 kV HBM); fixed I²C address 0xC0 (distinct from PCA9533D/02's 0xC6) | Delivers finer brightness gradation and smoother transitions; supports more complex lighting effects; pin-compatible but requires address conflict check in multi-device systems | Select PCA9632DP for premium dimming quality and future-proofing; retain PCA9533D/02 for cost-sensitive, proven 256-step implementations with existing firmware. |
Compared with TCA6507PWR and PCA9632DP, PCA9533D/02 offers the lowest gate count and simplest register map for basic dual-rate LED control, making it optimal for resource-constrained MCUs and legacy I²C systems where 256-step resolution suffices and autonomous blink operation reduces host processing load.
Availability
PCA9533D/02 is available at Aetrix Electronics and suitable for industrial HMIs, embedded display backlights, and status indicator systems requiring stable component supply and long-term production continuity.
Supply support for PCA9533D/02 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The PCA9533 product line delivers compact, low-power I²C-based LED control for space-constrained embedded systems where deterministic dimming and minimal MCU intervention are critical design goals.
FAQ
What is the I²C slave address of the PCA9533D/02?
The PCA9533D/02 has a fixed 7-bit I²C slave address of 0xC6 (11000110), with the R/W bit appended during transmission. This address is hardwired and differs from PCA9533D/01 (0xC4), enabling both variants to operate simultaneously on the same I²C bus without address collision. No external address pins are present on the PCA9533D/02.
Can unused LED pins on the PCA9533D/02 be used as general-purpose I/Os?
Yes, unused LEDn pins on the PCA9533D/02 can be reconfigured as GPIOs. When set to high-impedance (00 in LS0 register), they function as inputs readable via the INPUT register. When driven LOW (01 in LS0), they act as open-drain outputs - requiring an external pull-up resistor. PWM control remains available if assigned to BLINK0 or BLINK1 mode.
What is the maximum LED blink period achievable with the PCA9533D/02?
The PCA9533D/02 supports a maximum blink period of 1.69 seconds, derived from its lowest programmable frequency of 0.591 Hz (period = 1 / 0.591 ≈ 1.69 s). This is achieved by setting the prescaler register (PSC0 or PSC1) to its maximum value of 255, yielding (255 + 1) / 152 ≈ 1.69 s. Longer periods require MCU-level toggling.
Does the PCA9533D/02 require external components for oscillator operation?
No, the PCA9533D/02 contains a fully integrated RC oscillator with no external components required. This internal oscillator drives both PWM channels (BLINK0 and BLINK1) and eliminates the need for crystals, capacitors, or timing resistors - simplifying layout and reducing bill-of-materials cost compared to discrete PWM solutions.
What is the operating supply voltage range for the PCA9533D/02?
PCA9533D/02 operates over a supply voltage range of 2.3 V to 5.5 V, supporting both 3.3 V and 5 V logic domains. This wide range allows direct integration into mixed-voltage systems without level-shifting circuitry. The Power-On Reset (POR) threshold is specified between 1.7 V and 2.2 V, ensuring reliable initialization across the full VDD range.
PCA9533D/02,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2.3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 25mA
- Frequency:
- 400kHz
- Dimming:
- I2C, SMBus
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
PCA9533D/02,112 FAQ
1.How can I place an order for PCA9533D/02,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9533D/02,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PCA9533D/02,112 reliable?
The price and inventory of PCA9533D/02,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9533D/02,112 is usually 5 days.
3.What payment methods are accepted for PCA9533D/02,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9533D/02,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9533D/02,112?
PCA9533D/02,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9533D/02,112 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PCA9533D/02,112?
For technical support, including PCA9533D/02,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9533D/02,112 requirements.
6.How does Aetrix verify that PCA9533D/02,112 is sourced from the original manufacturer or authorized distributors?
All PCA9533D/02,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PCA9533D/02,112 meets industry standards.
7.What is the process for return or replacement of PCA9533D/02,112?
All PCA9533D/02,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9533D/02,112, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PCA9533D/02,112 part is unused and in its original packaging.
Return procedure for PCA9533D/02,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9533D/02,112 Tags
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