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NXP Semiconductors PCA9635PW/Q900,118
- Part No.:
- PCA9635PW/Q900,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9635PW/Q900,118.pdf
- Description:
- IC LED DRVR LIN PWM 25MA 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,503
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Product details
Overview
PCA9635PW/Q900,118 from NXP Semiconductors is a 16-bit Fast-mode Plus (Fm+) I²C-bus LED driver optimized for RGBA color mixing, featuring individual 97 kHz PWM per channel (256-step brightness), group PWM at 190 Hz or programmable blink (24 Hz–10.73 s), totem-pole/open-drain output configuration (25 mA sink/10 mA source), and AEC-Q100 qualification for automotive lighting control.
For engineers reviewing the PCA9635PW/Q900,118 datasheet, PCA9635PW/Q900,118 pinout, PCA9635PW/Q900,118 application, or PCA9635PW/Q900,118 equivalent, this device supports synchronized multi-device dimming/blinking via OE and group I²C addresses, high-capacitance bus operation up to 4000 pF, and hardware addressability for up to 126 units on one bus - critical for scalable LED matrix and status indicator designs.
Technical Context
The PCA9635PW/Q900,118 integrates a 25 MHz internal oscillator (no external components required), noise-filtered SDA/SCL inputs, and edge-rate-controlled outputs to ensure robust I²C communication at up to 1 MHz. Its dual PWM architecture separates per-LED 97 kHz brightness control (PWM0–PWM15) from global 190 Hz dimming or fully programmable blinking (GRPPWM/GRPFREQ).
Output behavior is defined by four-state LEDOUT registers (off/on/individual/group mode) and configurable drive topology (totem-pole default, software-selectable open-drain). The active-low OE pin enables hardware-synchronized blanking across multiple devices, while seven hardware address pins (A0–A6) and four software-programmable I²C addresses (All Call + three Sub Calls) support hierarchical bus management in dense LED systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Bus Speed | Up to 1 MHz (Fast-mode Plus), supporting buses up to 4000 pF - enables high-density LED arrays without signal integrity degradation. |
| LED Channels | 16 independent outputs, each with 8-bit (256-step) linear brightness control via 97 kHz PWM - ensures flicker-free, precise color mixing for RGB/RGBA applications. |
| Group Control | 256-step group PWM at fixed 190 Hz (dimming) or programmable 24 Hz–10.73 s period (blinking) - allows unified visual effects across all LEDs without individual register writes. |
| Output Drive | Totem-pole: 25 mA sink / 10 mA source at 5 V; open-drain: 25 mA sink at 5 V - supports direct LED driving or external high-current/high-voltage drivers. |
| Supply & Tolerance | 2.3 V–5.5 V operation; 5.5 V tolerant inputs - compatible with mixed-voltage systems and eliminates level-shifting for 3.3 V/5 V microcontrollers. |
| Addressing Capacity | 7 hardware address pins (126 unique addresses) + 1 All Call + 3 Sub Call addresses - enables scalable, hierarchical control of large LED networks with minimal I²C traffic. |
| Qualification | AEC-Q100 Grade 2 (−40 °C to +105 °C ambient) - validated for automotive cabin lighting, dashboard indicators, and infotainment backlighting. |
Pinout & Package
TSSOP28 package (SOT361-1), 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A6 | Hardware I²C address inputs | Set unique slave address; pulled HIGH/LOW externally - enables up to 126 devices on one bus without address conflict. |
| SDA | I²C serial data line (bidirectional) | 30 mA high-drive capability supports long traces or high-capacitance buses - reduces need for external buffers in multi-device layouts. |
| SCL | I²C serial clock input | No internal pull-up; requires external pull-up - ensures compatibility with standard I²C master timing and voltage levels. |
| OE | Active-low output enable | Asynchronous hardware blanking: sets all outputs to logic HIGH, LOW, or high-Z when asserted - enables synchronized power-down or external PWM dimming. |
| LED0–LED15 | LED driver outputs | Configurable as totem-pole or open-drain; 5.5 V tolerant - allows direct connection to common-anode/cathode LEDs or interfacing with external MOSFET drivers. |
| VDD / VSS | Power supply and ground | 2.3 V–5.5 V operation; decoupling capacitor required near VDD - ensures stable internal oscillator and PWM timing across voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Software Reset (SWRST) | Full register reset via I²C address 0x06 - restores all registers to POR state (outputs HIGH, brightness = 0) without power cycle, enabling reliable reinitialization in embedded firmware. |
| Output State Synchronization | Configurable update on STOP or ACK command - ensures atomic brightness changes across all 16 channels, preventing visual artifacts during multi-register writes. |
| Noise Immunity | Integrated noise filters on SDA/SCL inputs - suppresses EMI-induced glitches in automotive or industrial environments without external RC networks. |
| Hot Insertion Support | Safe power-up sequence with no output glitch - prevents unintended LED activation during live board insertion or hot-swap events in modular systems. |
| ESD Robustness | 2000 V HBM, 200 V MM, 1000 V CDM - exceeds JEDEC standards for handling and board-level reliability in manufacturing and field service. |
Applications
| Automotive Cabin Lighting | RGB Status Indicators |
|---|---|
Use Scenario: Dynamic ambient lighting and customizable dashboard icons in passenger vehicles. IC Role / Device Role / Timing Role: LED driver managing 16 independent RGBA channels with synchronized group blinking for warning alerts and smooth dimming for mood lighting. Use Value: AEC-Q100 qualification ensures operation from −40 °C to +105 °C; programmable GRPFREQ enables precise blink timing (e.g., hazard lights at 2 Hz) without MCU intervention. |
Use Scenario: Multi-color system-status LEDs on industrial HMIs, network switches, and medical equipment panels. IC Role / Device Role / Timing Role: Centralized brightness and blink control for 16 discrete indicators, coordinated via All Call I²C address to update all simultaneously. Use Value: 97 kHz individual PWM eliminates visible flicker; totem-pole outputs drive standard 20 mA LEDs directly, reducing BOM count and PCB area. |
| Keypad Backlighting | Small-Segment LED Displays |
Use Scenario: Backlighting for membrane keypads in handheld devices and automotive center consoles. IC Role / Device Role / Timing Role: Low-power LED driver with sleep mode (SLEEP bit) and hardware OE control for instant on/off response during button press detection. Use Value: 2.3 V minimum supply enables operation from single Li-ion cells; low standby current extends battery life in portable applications. |
Use Scenario: 16-segment alphanumeric displays or icon-based status matrices in test equipment and consumer electronics. IC Role / Device Role / Timing Role: Precision brightness-matched LED driver supporting individual segment intensity tuning and uniform group dimming for contrast adjustment. Use Value: 256-step linear PWM ensures consistent luminance gradation across segments; open-drain mode supports high-voltage LED strings via external transistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5940RTQR | 16-channel, 12-bit PWM (4096 steps); SPI interface; no group blink; 17 mA sink only | Lacks I²C addressing hierarchy and programmable blink; requires external clock | Choose for higher grayscale resolution in non-automotive SPI-based systems where group control is secondary. |
| IS31FL3728-QFLS4-TR | 18-channel, I²C, 8-bit PWM; integrated auto-breathing; no hardware address pins; 28 mA sink | Fixed 28-pin QFN; no OE pin; breathing function replaces GRPFREQ/GRPPWM but lacks independent blink/dim mode selection | Prefer for space-constrained consumer designs needing auto-fade effects, but not for AEC-Q100 or multi-bus scalability. |
Compared with TLC5940RTQR and IS31FL3728-QFLS4-TR, the PCA9635PW/Q900,118 uniquely combines AEC-Q100 compliance, hardware address scalability (126 devices), dedicated OE synchronization, and dual-mode group control (dimming vs. blink) - making it the only option qualified for automotive-grade, large-scale, and safety-critical LED systems.
Availability
PCA9635PW/Q900,118 is available at Aetrix Electronics and suitable for automotive cabin lighting, industrial HMI status indication, keypad backlighting, and small-segment LED displays requiring stable component supply, long-term lifecycle support, and AEC-Q100 assurance.
Supply support for PCA9635PW/Q900,118 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 integration and automotive-grade reliability.
The PCA9635 product line was designed specifically for scalable, flicker-free LED control in automotive interiors and industrial human-machine interfaces, emphasizing bus efficiency, thermal robustness, and functional safety readiness.
FAQ
What is the key difference between PCA9635PW/Q900,118 and the standard PCA9635PW,118?
The PCA9635PW/Q900,118 is identical in functionality and pinout to the PCA9635PW,118 but is AEC-Q100 qualified (Grade 2, −40 °C to +105 °C), undergoes additional automotive-specific stress testing, and carries extended traceability and lot-control documentation required for automotive Tier 1 suppliers. The PCA9635PW,118 is commercial-grade (−40 °C to +85 °C) and not certified for automotive use.
How does the PCA9635PW/Q900,118 achieve flicker-free LED operation?
The PCA9635PW/Q900,118 uses a fixed 97 kHz individual PWM frequency - well above the human visual persistence threshold (~200 Hz) - ensuring imperceptible switching even at full brightness. Its 256-step linear duty cycle control (0 % to 99.6 %) and synchronized output update (on STOP command) eliminate temporal artifacts during brightness transitions.
Can PCA9635PW/Q900,118 drive common-anode LEDs directly?
No - the PCA9635PW/Q900,118 outputs are current-sinking only (totem-pole or open-drain). To drive common-anode LEDs, an external PNP transistor or PMOS high-side switch must be used per channel. The device's 5.5 V tolerant outputs and 25 mA sink capability simplify interface design with such external drivers.
What happens to LED outputs when the OE pin is held HIGH?
When OE is HIGH, all 16 LED outputs enter a programmable high-impedance, logic HIGH, or logic LOW state based on the OUTNE[1:0] bits in MODE2 register. By default (OUTNE = 01), outputs go HIGH if configured as totem-pole, or high-Z if open-drain - enabling safe blanking without forward current flow through LEDs.
Does PCA9635PW/Q900,118 require an external crystal or resonator?
No - the PCA9635PW/Q900,118 contains a fully integrated 25 MHz oscillator requiring zero external components. This eliminates BOM cost, layout area, and timing calibration effort while ensuring stable 97 kHz and 190 Hz PWM frequencies across voltage and temperature ranges.
PCA9635PW/Q900,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 2.3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 5.5V
- Current - Output / Channel:
- 25mA
- Frequency:
- 100kHz ~ 1MHz
- Dimming:
- I2C
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
PCA9635PW/Q900,118 FAQ
1.How can I place an order for PCA9635PW/Q900,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9635PW/Q900,118 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 PCA9635PW/Q900,118 reliable?
The price and inventory of PCA9635PW/Q900,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9635PW/Q900,118 is usually 5 days.
3.What payment methods are accepted for PCA9635PW/Q900,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9635PW/Q900,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9635PW/Q900,118?
PCA9635PW/Q900,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9635PW/Q900,118 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 PCA9635PW/Q900,118?
For technical support, including PCA9635PW/Q900,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9635PW/Q900,118 requirements.
6.How does Aetrix verify that PCA9635PW/Q900,118 is sourced from the original manufacturer or authorized distributors?
All PCA9635PW/Q900,118 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 PCA9635PW/Q900,118 meets industry standards.
7.What is the process for return or replacement of PCA9635PW/Q900,118?
All PCA9635PW/Q900,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9635PW/Q900,118, 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 PCA9635PW/Q900,118 part is unused and in its original packaging.
Return procedure for PCA9635PW/Q900,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9635PW/Q900,118 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
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
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