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NXP Semiconductors PCA9533D/02,118
- Part No.:
- PCA9533D/02,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PCA9533D/02,118.pdf
- Description:
- IC LED DRVR LINEAR I2C 25MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,215
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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 independently programmable blink rates (0.591–152 Hz), 25 mA per output sink current, and operates from 2.3 V to 5.5 V. Used in display backlighting and status indicator systems where precise, flicker-free LED intensity control is required.
For engineers reviewing the PCA9533D/02 datasheet, PCA9533D/02 pinout, PCA9533D/02 application, or PCA9533D/02 equivalent, this page provides verified functional specifications, confirmed SO8 package mapping, validated I²C address (0xC6), real-world GPIO reuse capability, and direct alternative part comparisons for LED driver selection in embedded UI and power-efficient visual feedback designs.
Technical Context
The PCA9533D/02 implements a dual-PWM architecture with two independent prescaler/PWM register pairs (PSC0/PWM0 and PSC1/PWM1), enabling simultaneous control of LED brightness and blink behavior. Its internal oscillator eliminates external timing components, and the LED selector register (LS0) directly maps each of the four open-drain outputs to ON/OFF/BLINK0/BLINK1 states.
I²C communication uses fixed slave address 0xC6 (11000110), differing from PCA9533D/01 (0xC4); both support standard- and fast-mode I²C (up to 400 kHz) with noise filtering on SCL/SDA. Power-on reset initializes all outputs HIGH (LED off) and registers to default values, ensuring deterministic startup without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Address | Fixed 7-bit address 0xC6 - enables coexistence with PCA9533D/01 (0xC4) on same bus without address conflict. |
| PWM Resolution | 256-step duty cycle (0–100%) - enables smooth, perceptually linear brightness transitions in RGB backlighting. |
| Blink Frequency Range | 0.591 Hz to 152 Hz (1.69 s to 6.58 ms period) - supports both visible blinking and imperceptible >100 Hz dimming modes. |
| Output Sink Current | 25 mA per LED pin, 100 mA total package - drives standard LEDs directly without external drivers in low-power UI applications. |
| Supply Voltage | 2.3 V to 5.5 V - interoperates with 3.3 V microcontrollers and 5 V legacy systems without level shifting. |
| Standby Current | 1.9 µA typical at 5.5 V - suitable for battery-powered devices requiring ultra-low quiescent power during sleep. |
| ESD Protection | 2000 V HBM, 150 V MM, 1000 V CDM - meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
PCA9533D/02 is supplied in an 8-pin SO8 package (SOT96-1), 3.9 mm body width, with gull-wing leads. Pin 1 is marked by a notch or dot; device orientation follows JEDEC MS-012 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED0 (Pin 1) | Open-drain LED driver output 0 | Sinks up to 25 mA; configured via LS0 register for ON/OFF/BLINK0/BLINK1; doubles as GPIO input/output when not used for LED control. |
| VDD (Pin 2) | Positive supply voltage | Accepts 2.3–5.5 V; powers internal logic and oscillator; requires local 100 nF decoupling to VSS. |
| LED1 (Pin 3) | Open-drain LED driver output 1 | Functionally identical to LED0; independent PWM control via LS0 bits 3–2. |
| SDA (Pin 4) | I²C serial data line | Open-drain bidirectional interface; requires external pull-up (typically 2.2–10 kΩ to VDD); includes internal noise filter. |
| LED2 (Pin 5) | Open-drain LED driver output 2 | Same electrical specs as LED0/LED1; LS0 bits 5–4 select its mode; supports high-impedance state for GPIO input use. |
| SCL (Pin 6) | I²C serial clock line | Input-only clock signal; 400 kHz max; includes internal noise filter; requires external pull-up. |
| VSS (Pin 7) | Ground reference | Must be connected to system ground plane; serves as return path for all sink currents and internal logic. |
| LED3 (Pin 8) | Open-drain LED driver output 3 | Final channel; LS0 bits 7–6 configure behavior; shares 100 mA package current limit with other LED pins. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM generators | Enables concurrent control of two distinct blink profiles (e.g., status alert + heartbeat indicator) without MCU intervention. |
| No external timing components | Internal oscillator eliminates RC networks or crystals, reducing BOM count and PCB footprint in space-constrained UI modules. |
| GPIO reuse capability | Unused LEDn pins function as configurable inputs (with internal pull-up emulation) or open-drain outputs, extending I/O count for push-buttons or alarm monitoring. |
| Hot insertion support | Withstands live bus connection without latch-up or corruption, simplifying field-replaceable display module integration. |
| Power-on reset with default OFF state | Guarantees all LEDs remain extinguished at power-up, preventing unintended illumination in safety-critical or low-power wake-up scenarios. |
Applications
| RGB Backlight Control | Industrial Status Indicators |
|---|---|
Use Scenario: Driving red/green/blue LEDs behind LCD panels in medical monitors and test equipment to achieve calibrated white point and dynamic contrast. IC Role / Device Role / Timing Role: PCA9533D/02 acts as dedicated I²C-controlled PWM engine, replacing MCU GPIO + timer resources and enabling synchronized color blending at >100 Hz to eliminate visible flicker. Use Value: Reduces host processor load by 100% for LED timing tasks and ensures consistent 256-step intensity gradation across all three channels using shared oscillator precision. | Use Scenario: Providing multi-state visual feedback (e.g., RUN/FAULT/STANDBY) on PLC I/O modules and motor drives with distinct blink patterns and brightness levels. IC Role / Device Role / Timing Role: PCA9533D/02 serves as autonomous blink controller, executing pre-programmed BLINK0/BLINK1 sequences independent of main firmware execution cycles. Use Value: Eliminates need for periodic MCU polling or interrupt-driven LED toggling, improving real-time determinism and lowering average system power by 12 µA vs. software-timed GPIO. |
| Consumer Device UI Lighting | ACPI Power Switch Interface |
Use Scenario: Managing ambient lighting and button backlighting in smart speakers and home hubs where uniform dimming and low standby current are critical. IC Role / Device Role / Timing Role: PCA9533D/02 functions as low-power LED manager, using its 1.9 µA standby current and 256-step resolution to sustain soft-glow effects during sleep mode. Use Value: Extends battery life in portable variants by maintaining LED visibility at <5 µA average current while preserving full brightness range for active use. | Use Scenario: Interfacing mechanical power switches and thermal sensors to ACPI-compliant host controllers in embedded PCs and thin clients. IC Role / Device Role / Timing Role: PCA9533D/02 operates as general-purpose I/O expander, repurposing LEDn pins as interrupt-capable inputs for switch closure detection and fault signaling. Use Value: Provides 4 additional robust, ESD-hardened (2000 V HBM) GPIOs with built-in input filtering-reducing external component count versus discrete buffer solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCA62724FMG | 4-channel constant-current LED driver with I²C interface; no internal oscillator; requires external PWM source or register-based current setting. | Designed for current-regulated LED strings (max 30 mA/ch), not voltage-mode PWM dimming; lacks dual-blink functionality. | Select when precise current matching across LEDs is required over PWM-based brightness control. |
| PCA9632DP | 4-bit I²C LED driver with 256-step PWM, integrated oscillator, and identical SO8 package; supports higher 25 mA sink per channel but adds auto-increment addressing and improved ESD (4000 V HBM). | Includes enhanced features like group dimming and sleep mode; pinout differs (SCL/SDA swapped), requiring PCB layout change. | Choose for new designs needing extended feature set and higher ESD robustness; not drop-in compatible due to pin reordering. |
Compared with TCA62724FMG and PCA9632DP, the PCA9533D/02 offers unique fixed-address dual-blink operation in a mature, cost-optimized SO8 footprint-making it ideal for established designs prioritizing simplicity, I²C bus efficiency, and guaranteed coexistence with PCA9533D/01 on shared buses.
Availability
PCA9533D/02 is available at Aetrix Electronics and suitable for RGB backlighting, industrial status indicators, consumer UI lighting, and ACPI power switch interfaces requiring stable component supply and long-term industrial temperature support (−40 °C to +85 °C).
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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in I²C peripheral design and power-efficient mixed-signal ICs.
The PCA9533 product line was engineered to simplify LED control in resource-constrained embedded systems-delivering integrated PWM timing, low-voltage operation, and I²C bus efficiency without sacrificing reliability or thermal performance.
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 differs from PCA9533D/01 (0xC4), allowing both variants to operate simultaneously on the same I²C bus without address collision. The PCA9533D/02 address is hardwired and not user-configurable via hardware pins.
Can unused LED pins on the PCA9533D/02 be used as general-purpose I/Os?
Yes, unused LEDn pins on the PCA9533D/02 can function as GPIOs. When configured to high-impedance (00) via the LS0 register, they act as inputs readable through the INPUT register. As outputs, they drive LOW when selected via LS0 and require an external pull-up resistor. The PCA9533D/02 supports this dual-role operation without additional configuration overhead.
What is the maximum PWM frequency achievable with the PCA9533D/02?
The PCA9533D/02 achieves a maximum PWM frequency of 152 Hz (6.58 ms period), derived from its internal oscillator and prescaler register limits (PSC = 0). At this rate, the duty cycle resolution remains 256 steps (0–100%), enabling high-frequency dimming that avoids visible flicker while retaining fine brightness control. Frequencies above 152 Hz are not supported.
Does the PCA9533D/02 require external components for oscillator operation?
No, the PCA9533D/02 contains a fully integrated oscillator requiring no external resistors, capacitors, or crystals. This internal timing source drives both PWM channels and eliminates BOM items and layout area typically needed for RC or crystal-based oscillators-simplifying design and improving long-term stability across temperature and voltage ranges.
How does the PCA9533D/02 handle power-up behavior?
The PCA9533D/02 incorporates a Power-On Reset (POR) circuit that holds the device in reset until VDD reaches VPOR (1.7–2.2 V), then initializes all registers to default states: LED outputs HIGH (off), control bits cleared, and blink registers zeroed. This guarantees predictable, safe startup with no LED turn-on glitches-critical for applications where unintended illumination must be avoided.
PCA9533D/02,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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/02,118 FAQ
1.How can I place an order for PCA9533D/02,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9533D/02,118 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/02,118 reliable?
The price and inventory of PCA9533D/02,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9533D/02,118 is usually 5 days.
3.What payment methods are accepted for PCA9533D/02,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9533D/02,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9533D/02,118?
PCA9533D/02,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9533D/02,118 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/02,118?
For technical support, including PCA9533D/02,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9533D/02,118 requirements.
6.How does Aetrix verify that PCA9533D/02,118 is sourced from the original manufacturer or authorized distributors?
All PCA9533D/02,118 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/02,118 meets industry standards.
7.What is the process for return or replacement of PCA9533D/02,118?
All PCA9533D/02,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9533D/02,118, 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/02,118 part is unused and in its original packaging.
Return procedure for PCA9533D/02,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9533D/02,118 Tags
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