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NXP Semiconductors PCA9633D16,112
- Part No.:
- PCA9633D16,112
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PCA9633D16,112.pdf
- Description:
- IC LED DRIVER PS PWM 25MA 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,627
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Product details
Overview
PCA9633D16,112 from NXP Semiconductors is a 4-bit Fast-mode Plus (Fm+) I²C-bus LED driver optimized for RGBA color mixing, featuring four 8-bit individual PWM channels at 97 kHz, one 8-bit group PWM with programmable frequency (24 Hz to 10.73 s), and 16-pin SO package with active-low Output Enable (OE) pin. It operates from 2.3 V to 5.5 V, supports 5.5 V-tolerant inputs, and delivers 25 mA sink per LED output - used in keypad backlights and RGB status indicators.
For engineers reviewing the PCA9633D16,112 datasheet, PCA9633D16,112 pinout, PCA9633D16,112 application, or PCA9633D16,112 equivalent, key selection criteria include its 126 configurable I²C addresses via seven hardware address pins, OE-driven hardware blinking/dimming capability, totem-pole or open-drain output configuration, Group PWM frequency programmability, and Fm+ bus support up to 1 MHz with 30 mA SDA drive strength.
Technical Context
The PCA9633D16,112 implements dual-layer PWM control: each of the four LED outputs uses a fixed 97 kHz individual PWM generator with 256-step linear brightness control, while a shared group PWM (190 Hz fixed or 24 Hz–10.73 s programmable) modulates all outputs simultaneously for synchronized dimming or blinking. Its I²C interface complies with Fast-mode Plus (1 MHz, 4000 pF bus loading), enabled by an internal 25 MHz oscillator and edge-rate-controlled outputs.
Configuration is managed through eight volatile control registers (MODE1/MODE2, PWM0–PWM3, GRPPWM, GRPFREQ, LEDOUT, ALLCALLADR), supporting Auto-Increment addressing modes and software reset (SWRST Call at 0x06). The 16-pin variant uniquely includes OE pin for asynchronous hardware-level output enable/disable and external PWM synchronization - absent in 8- and 10-pin versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Bus Speed | Up to 1 MHz Fast-mode Plus - enables high-density bus operation up to 4000 pF without external pull-up strengthening. |
| Individual PWM Frequency | 97 kHz fixed - eliminates audible noise and ensures stable LED current regulation across brightness levels. |
| Group PWM Frequency Range | 24 Hz to 10.73 s (256 steps) - supports both imperceptible dimming and slow visual effects like breathing or marquee timing. |
| Output Drive Capability | 25 mA sink / 10 mA source (totem-pole) or 25 mA sink only (open-drain) - directly drives standard LEDs without external transistors. |
| Supply Voltage Range | 2.3 V to 5.5 V - interoperable with 3.3 V and 5 V logic systems and tolerant of brown-out conditions. |
| I²C Address Options | 126 unique slave addresses via A0–A6 pins - allows large-scale daisy-chained LED arrays on a single bus. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and consumer handheld environments including cellular phone keypads. |
Pinout & Package
PCA9633D16,112 is supplied in SO16 (plastic small outline, 3.9 mm body width, SOT109-1), with 16 leads and gull-wing leads. Pin 1 is index-marked; pin 9 is VSS (ground); pin 10 is active-low OE; pins 3–6 are LED0–LED3 outputs; pins 1, 2, 11, 14, 15, 16 are address inputs (A0–A6) and power (VDD).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A6 | Hardware I²C address inputs | Set one of 126 unique slave addresses; must be externally pulled HIGH/LOW - no internal pull-ups. |
| LED0–LED3 | LED driver outputs | Configurable as totem-pole (25 mA sink / 10 mA source) or open-drain (25 mA sink); 5.5 V tolerant. |
| OE | Active-low output enable | Asynchronously disables all LED outputs when HIGH; enables hardware-synchronized blinking/dimming when driven by external clock. |
| SCL / SDA | I²C bus interface | Fm+ compliant (1 MHz); SDA has 30 mA high-drive capability to drive heavy capacitive buses. |
| VDD / VSS | Power supply terminals | VDD accepts 2.3–5.5 V; VSS is ground reference; both pins required for stable operation and thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Software Reset (SWRST) | Reset to POR state via I²C address 0x06 - reinitializes all registers and sets outputs HIGH (LED off) without power cycle. |
| LED Group & Sub Call Addresses | One All Call (E0h) + three Sub Call (E2h/E4h/E8h) addresses - enables simultaneous control of LED groups (e.g., all reds) with minimal I²C traffic. |
| Output State Update Timing | Configurable to change on STOP or ACK command - ensures atomic brightness updates across multiple PCA9633D16,112 devices. |
| Noise Immunity | Integrated input filters on SDA/SCL + edge-rate control on outputs - maintains reliable communication in noisy industrial or mobile environments. |
| Hot Insertion Support | Internal power-on reset and glitch-free startup - allows safe insertion into live I²C buses without disrupting other slaves. |
Applications
| RGB Status Indicators | Keypad Backlighting |
|---|---|
Use Scenario: Multi-color status feedback on industrial HMI panels or network equipment front panels. IC Role / Device Role / Timing Role: PCA9633D16,112 provides independent 97 kHz PWM per channel to mix red/green/blue for precise hue control and smooth transitions. Use Value: Eliminates microcontroller GPIO overhead and software PWM jitter, enabling consistent color fidelity across temperature and supply variation. |
Use Scenario: Uniform backlighting for alphanumeric keypads in cellular phones and handheld medical devices. IC Role / Device Role / Timing Role: PCA9633D16,112 drives four LED strings via LED0–LED3, using group PWM for global brightness scaling and individual PWM for local intensity correction. Use Value: Reduces BOM count by integrating driver, PWM, and I²C interface - no external MOSFETs or timing components required. |
| LED Display Segments | Low-Power LCD Backlights |
Use Scenario: Small-character segment displays in battery-powered test equipment or portable instrumentation. IC Role / Device Role / Timing Role: PCA9633D16,112 controls discrete LED segments using LDRx register states (off/on/PWM/group-PWM) for dynamic visibility adjustment. Use Value: Enables ultra-low standby current and precise 256-step dimming down to 0.4% duty cycle - extends battery life without visible flicker. |
Use Scenario: Edge-lit monochrome LCD backlights in automotive infotainment or industrial displays. IC Role / Device Role / Timing Role: PCA9633D16,112 drives white LED strings with totem-pole outputs, leveraging OE pin for synchronized PWM dimming across multiple display zones. Use Value: Hardware OE control avoids CPU intervention during display brightness changes - critical for real-time UI responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59116IPWPR | 16-channel, 12-bit PWM, no group PWM; I²C up to 400 kHz; no OE pin; 3.3 V only supply. | Lacks hardware blink/dim sync and group modulation - requires MCU coordination for synchronized effects. | Select when higher channel count and finer 4096-step brightness resolution are prioritized over group control and OE functionality. |
| IS31FL3728-QFLS4-TR | 28-channel, 8-bit PWM, integrated current regulation; I²C up to 1 MHz; no OE pin; 2.7–5.5 V supply. | Higher integration but no dedicated group frequency programming - blinking relies on fixed 24 Hz or software timing. | Select for dense LED arrays requiring >4 channels; avoid when hardware OE-driven synchronization is mandatory. |
Compared with TLC59116IPWPR and IS31FL3728-QFLS4-TR, the PCA9633D16,112 uniquely combines 126-address scalability, OE-driven hardware blink/dim, and dual-layer (individual + programmable-group) PWM - making it optimal for cost-sensitive, low-channel RGBA systems needing deterministic timing without MCU load.
Availability
PCA9633D16,112 is available at Aetrix Electronics and suitable for RGB status indicators, keypad backlights, LED display segments, and low-power LCD backlights requiring stable component supply across industrial, medical, and consumer electronics programs.
Supply support for PCA9633D16,112 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in I²C peripheral innovation and robust qualification standards.
The PCA9633 family was designed specifically for efficient, scalable RGBA LED control in space-constrained and power-sensitive applications - emphasizing Fm+ bus performance, hardware synchronization, and flexible output configuration.
FAQ
What is the maximum I²C bus speed supported by the PCA9633D16,112?
The PCA9633D16,112 supports Fast-mode Plus (Fm+) I²C operation up to 1 MHz, with 30 mA SDA drive strength to maintain signal integrity on buses with up to 4000 pF capacitance - significantly exceeding standard Fast-mode (400 kHz) capability and enabling denser multi-device configurations without bus repeaters.
How does the OE pin function on the PCA9633D16,112?
The OE (Output Enable) pin on the PCA9633D16,112 is an active-low hardware control that asynchronously enables or disables all four LED outputs. When OE is LOW, outputs follow LEDOUT register settings; when HIGH, outputs assume a defined state (1, 0, or high-Z) per MODE2's OUTNE bits - enabling external PWM dimming or synchronized blinking across multiple PCA9633D16,112 devices.
Can the PCA9633D16,112 drive LEDs directly without external transistors?
Yes, the PCA9633D16,112 can directly drive standard LEDs: each LED0–LED3 output supports 25 mA sink (and 10 mA source in totem-pole mode) at 5 V, with 5.5 V tolerance on all I/O pins. It supports both totem-pole and open-drain configurations via MODE2.OUTDRV bit - eliminating need for external drivers in most low-to-mid current applications.
What is the purpose of the GRPFREQ and GRPPWM registers in the PCA9633D16,112?
The GRPPWM register sets the 8-bit group duty cycle (0–99.6%), while GRPFREQ sets the 8-bit group blinking period (24 Hz to 10.73 s). When DMBLNK=1 in MODE2, these registers jointly define a global blinking pattern applied to all LEDs configured with LDRx=11; when DMBLNK=0, GRPPWM acts as a global dimming multiplier while GRPFREQ is ignored.
Does the PCA9633D16,112 support software reset, and how is it triggered?
Yes, the PCA9633D16,112 supports Software Reset (SWRST) via I²C address 0x06 with R/W=0. This performs a full register reset identical to Power-On Reset (POR), restoring all registers to default values and setting LED outputs HIGH (LED off). It requires no hardware reset line and enables rapid reconfiguration during runtime.
PCA9633D16,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Power Switch
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2.3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 5.5V
- Current - Output / Channel:
- 25mA
- Frequency:
- -
- Dimming:
- I2C
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
PCA9633D16,112 FAQ
1.How can I place an order for PCA9633D16,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9633D16,112 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 PCA9633D16,112 reliable?
The price and inventory of PCA9633D16,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9633D16,112 is usually 5 days.
3.What payment methods are accepted for PCA9633D16,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9633D16,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9633D16,112?
PCA9633D16,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9633D16,112 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 PCA9633D16,112?
For technical support, including PCA9633D16,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9633D16,112 requirements.
6.How does Aetrix verify that PCA9633D16,112 is sourced from the original manufacturer or authorized distributors?
All PCA9633D16,112 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 PCA9633D16,112 meets industry standards.
7.What is the process for return or replacement of PCA9633D16,112?
All PCA9633D16,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9633D16,112, 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 PCA9633D16,112 part is unused and in its original packaging.
Return procedure for PCA9633D16,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9633D16,112 Tags
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BCR420UE6433HTMA1
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