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NXP Semiconductors PCA9533DP/02,118
- Part No.:
- PCA9533DP/02,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PCA9533DP/02,118.pdf
- Description:
- IC LED DRVR LIN I2C 25MA 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,221
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Product details
Overview
PCA9533DP/02 from NXP Semiconductors is a 4-bit I²C-bus LED dimmer IC optimized for RGB color mixing and backlight control, featuring two independent programmable PWM blink rates (0.591–152 Hz), 256 brightness steps per channel, 25 mA sink current per output, and operation from 2.3 V to 5.5 V supply. It integrates an internal oscillator and supports GPIO expansion on unused LED pins.
For engineers reviewing the PCA9533DP/02 datasheet, PCA9533DP/02 pinout, PCA9533DP/02 application, or PCA9533DP/02 equivalent, key selection criteria include its fixed I²C address (0xC6), TSSOP8 package with 3 mm body width, dual PWM register architecture (PSC0/PWM0 and PSC1/PWM1), and open-drain LED driver capability without external timing components.
Technical Context
The PCA9533DP/02 implements a dedicated LED dimming architecture with two independent PWM generators-each comprising a frequency prescaler (PSC0/PSC1) and duty-cycle register (PWM0/PWM1)-enabling simultaneous control of four LEDs at distinct brightness levels or blink periods up to 1.69 s. Its I²C interface operates at up to 400 kHz and includes noise filtering on SCL/SDA inputs.
All four LEDn outputs are open-drain with 25 mA sink capability per pin and 100 mA total package limit; unused pins function as GPIOs via high-impedance mode and INPUT register readback. Power-on reset initializes all registers to default states, setting outputs HIGH (LED off) and configuring the device for immediate I²C command execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Address | Fixed 7-bit address 0xC6 (1100011b); enables coexistence with PCA9533D/01 (0xC4) on same bus |
| PWM Frequency Range | 0.591 Hz to 152 Hz (1.69 s to 6.58 ms period); set via 8-bit PSC0/PSC1 registers |
| Brightness Resolution | 256-step linear dimming (0–255) via 8-bit PWM0/PWM1 duty-cycle registers |
| Output Sink Current | 25 mA per LEDn pin; 100 mA total package limit ensures safe parallel LED driving |
| Supply Voltage | 2.3 V to 5.5 V operation; supports mixed-voltage systems including 3.3 V and 5 V rails |
| Standby Current | 1.9 µA typical at 5.5 V; enables low-power backlight management in battery-sensitive designs |
| ESD Protection | 2000 V HBM, 150 V MM, 1000 V CDM per JESD22 standards; robust handling in assembly environments |
Pinout & Package
TSSOP8 package (SOT505-1): plastic thin shrink small outline, 8 leads, 3 mm body width, 0.65 mm lead pitch, 1.1 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LED0) | Open-drain LED driver output 0 | Sinks up to 25 mA; configured via LS0 register bits 1:0 (00=off, 01=on, 10=BLINK0, 11=BLINK1) |
| 2 (LED1) | Open-drain LED driver output 1 | Independent control identical to LED0; supports per-channel dimming or blinking |
| 3 (LED2) | Open-drain LED driver output 2 | Same register mapping as LED0/LED1; enables full 4-channel RGB or backlight control |
| 4 (VSS) | Ground reference | Must be connected to system GND; serves as return path for all sink currents |
| 5 (LED3) | Open-drain LED driver output 3 | Final channel for quad-LED applications; shares same PWM and selector register structure |
| 6 (SCL) | I²C serial clock input | Accepts up to 400 kHz clock; includes internal noise filter for reliable bus communication |
| 7 (SDA) | I²C serial data bidirectional line | Open-drain interface requiring external pull-up; supports standard/fast-mode I²C protocols |
| 8 (VDD) | Positive supply voltage | 2.3–5.5 V range powers internal logic and oscillator; POR triggers above 1.7 V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM engines | Separate PSC0/PWM0 and PSC1/PWM1 registers allow concurrent control of two distinct blink profiles |
| No external timing components | Integrated oscillator eliminates need for RC networks or crystals-reducing BOM count and layout area |
| GPIO reuse capability | Unused LEDn pins operate as configurable inputs/outputs via high-impedance mode and INPUT register |
| I²C/SMBus compatibility | Fully compliant with SMBus alert response and timeout specifications; supports hot insertion |
| Robust power sequencing | Power-on reset ensures known state at power-up; no glitch on VDD ramp; supports 0.2 V reset threshold |
Applications
| RGB LED Backlight Control | Industrial Status Indicator Panel |
|---|---|
Use Scenario: Driving red, green, and blue LEDs behind LCD panels in medical monitors and industrial HMIs to achieve precise white-point tuning and dynamic contrast adjustment. IC Role / Device Role / Timing Role: LED dimmer IC providing synchronized 256-step intensity control across three channels using BLINK0/BLINK1 PWM outputs. Use Value: Eliminates need for external microcontroller PWM resources and reduces firmware complexity by offloading color-mixing timing to hardware. |
Use Scenario: Providing multi-color status feedback on programmable logic controllers (PLCs) and motor drives where visual indication of fault, run, standby, and alarm conditions is required. IC Role / Device Role / Timing Role: I²C-controlled LED driver enabling remote configuration of blink patterns and brightness without board-level rework. Use Value: Enables field-upgradable indicator behavior via simple register writes-no hardware changes needed for new operational modes. |
| Consumer Electronics Keypad Illumination | ACPI Power Switch Interface |
Use Scenario: Dimmable backlighting for membrane keypads in smart home thermostats and audio receivers, supporting user-adjustable brightness and sleep-mode fade-out. IC Role / Device Role / Timing Role: Low-power LED controller operating from 3.3 V rail with 1.9 µA standby current and programmable 1.69 s maximum blink period. Use Value: Extends battery life in portable devices while maintaining visible illumination through hardware-based PWM rather than software-timed toggling. |
Use Scenario: Interfacing mechanical power switches to ACPI-compliant host processors in embedded PCs and thin clients, where switch press detection and LED feedback must coexist on minimal GPIOs. IC Role / Device Role / Timing Role: Dual-function I/O expander-using LEDn pins as both switch inputs (via INPUT register) and status indicators (via PWM outputs). Use Value: Consolidates discrete switch debouncing circuitry and LED drivers into one 8-pin TSSOP, reducing component count and PCB footprint. |
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 (0x42), 7-channel output, higher 100 mA per pin rating, no internal oscillator (requires external clock) | Supports more LEDs per device but lacks integrated PWM timing-requires MCU coordination for dimming | Choose when expanding beyond 4 channels or needing higher per-pin drive strength; avoid if oscillator-free design is critical |
| PCA9632DP | Same 4-channel architecture, 1 MHz I²C support, enhanced ESD (4 kV HBM), built-in LED error detection | Includes thermal shutdown and open-load detection-suited for safety-critical lighting systems | Prefer for automotive or industrial applications requiring fault diagnostics; PCA9533DP/02 remains optimal for cost-sensitive consumer backlighting |
Compared with TCA6507PWR and PCA9632DP, the PCA9533DP/02 delivers the most compact solution for basic 4-LED dimming with zero external timing components, lower standby current, and direct drop-in replacement in legacy NXP I²C LED control designs.
Availability
PCA9533DP/02 is available at Aetrix Electronics and suitable for RGB backlight control, industrial status indication, keypad illumination, and ACPI power switch interfaces requiring stable component supply and long-term production continuity.
Supply support for PCA9533DP/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 over 50 years of analog and mixed-signal design heritage.
The PCA9533 family was designed specifically for space-constrained LED dimming in human-interface and display subsystems, emphasizing low power, I²C simplicity, and hardware-based PWM independence from host processor load.
FAQ
What is the I²C slave address of the PCA9533DP/02?
The PCA9533DP/02 has a fixed 7-bit I²C address of 0xC6 (1100011b), with the R/W bit appended during transmission. This address distinguishes it from the PCA9533D/01 (0xC4), allowing both variants to operate simultaneously on the same I²C bus without conflict. The PCA9533DP/02's address is hardwired and not configurable via external pins.
How does the PCA9533DP/02 achieve 256-step LED brightness control?
The PCA9533DP/02 achieves 256-step brightness control using two 8-bit PWM registers (PWM0 and PWM1), each defining the duty cycle as PWMx/256. Combined with independently programmable frequency prescalers (PSC0/PSC1), this allows precise intensity tuning without MCU intervention. The PCA9533DP/02 applies these values directly to its open-drain outputs, delivering hardware-based dimming.
Can unused LED pins on the PCA9533DP/02 be used as general-purpose I/Os?
Yes-unused LEDn pins on the PCA9533DP/02 can function as GPIOs. Configure them as high-impedance (00 in LS0 register) to read external signals via the INPUT register, or drive them LOW (01) with external pull-ups for output. The PCA9533DP/02 supports both input sensing and pulsed output using its PWM engines, making it adaptable beyond LED control.
What is the maximum blink period supported by the PCA9533DP/02's internal oscillator?
The PCA9533DP/02 supports a maximum blink period of 1.69 seconds, achieved when PSC0 or PSC1 is set to 0xFF (255), yielding a frequency of 0.591 Hz. This is calculated as (PSCx + 1)/152 Hz. For longer intervals, the host MCU must issue repeated ON/OFF commands-a capability retained for backward compatibility with standard I/O expanders like the PCA9554.
Does the PCA9533DP/02 require external components for oscillator operation?
No-the PCA9533DP/02 contains a fully integrated oscillator that requires no external resistors, capacitors, or crystals. This internal timing source drives both PWM engines and eliminates BOM cost and layout area associated with discrete timing networks. The PCA9533DP/02's oscillator is factory-trimmed and operates across the full 2.3–5.5 V supply and −40 °C to +85 °C temperature range.
PCA9533DP/02,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-TSSOP
PCA9533DP/02,118 FAQ
1.How can I place an order for PCA9533DP/02,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9533DP/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 PCA9533DP/02,118 reliable?
The price and inventory of PCA9533DP/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 PCA9533DP/02,118 is usually 5 days.
3.What payment methods are accepted for PCA9533DP/02,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9533DP/02,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9533DP/02,118?
PCA9533DP/02,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9533DP/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 PCA9533DP/02,118?
For technical support, including PCA9533DP/02,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9533DP/02,118 requirements.
6.How does Aetrix verify that PCA9533DP/02,118 is sourced from the original manufacturer or authorized distributors?
All PCA9533DP/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 PCA9533DP/02,118 meets industry standards.
7.What is the process for return or replacement of PCA9533DP/02,118?
All PCA9533DP/02,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9533DP/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 PCA9533DP/02,118 part is unused and in its original packaging.
Return procedure for PCA9533DP/02,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9533DP/02,118 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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