My Inquiry
My Account
NXP Semiconductors PCA9633PW,112
- Part No.:
- PCA9633PW,112
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9633PW,112.pdf
- Description:
- IC LED DRVR PS PWM 25MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,551
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PCA9633PW,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 (97 kHz, 0–99.6% duty cycle), one 8-bit group PWM (190 Hz fixed or 24 Hz–10.73 s programmable), 2.3–5.5 V operation, and totem-pole/open-drain output configuration. It enables precise brightness control in compact handheld displays.
For engineers reviewing the PCA9633PW,112 datasheet, PCA9633PW,112 pinout, PCA9633PW,112 application, or PCA9633PW,112 equivalent, key selection criteria include I²C address flexibility (7 hardware pins → 126 addresses), OE-driven hardware synchronization, group blinking vs. dimming mode selection, and 5.5 V-tolerant I/O compatibility with mixed-voltage systems.
Technical Context
The PCA9633PW,112 implements dual-layer PWM architecture: per-channel 97 kHz individual brightness control (256-step linear) overlays a separately configurable group-level PWM (190 Hz fixed or 24 Hz–10.73 s programmable) for synchronized dimming or blinking. Its Fm+ interface supports up to 1 MHz clocking with 30 mA SDA drive strength for high-capacitance buses.
Output drivers are software-configurable as totem-pole (25 mA sink / 10 mA source at 5 V) or open-drain (25 mA sink), with active-low Output Enable (OE) enabling hardware-synchronized global on/off or external PWM dimming - a feature exclusive to the 16-pin TSSOP package variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Interface | Fast-mode Plus (Fm+) supporting up to 1 MHz clock; 30 mA SDA drive capability enables reliable communication on buses up to 4000 pF capacitance. |
| Individual PWM | Four independent 8-bit (256-step) channels at fixed 97 kHz frequency; duty cycle adjustable 0–99.6% for precise per-LED brightness scaling. |
| Group PWM | One 8-bit (256-step) channel with selectable mode: fixed 190 Hz for global dimming, or programmable 24 Hz–10.73 s period for synchronized blinking. |
| Supply Range | 2.3 V to 5.5 V operation; inputs tolerant to 5.5 V, allowing direct interfacing with 3.3 V or 5 V microcontrollers without level shifters. |
| Output Drive | Configurable totem-pole (25 mA sink / 10 mA source at 5 V) or open-drain (25 mA sink); supports direct connection of standard LEDs ≤25 mA. |
| Address Flexibility | Seven hardware address pins (A0–A6) enable up to 126 unique I²C slave addresses on a single bus; plus software-programmable All Call and three Sub Call addresses. |
| Operating Temp | −40 °C to +85 °C ambient range, qualified for industrial and consumer portable electronics applications. |
Pinout & Package
TSSOP16 package (SOT403-1), 4.4 mm body width, 0.65 mm pitch; thermally enhanced plastic thin shrink small outline with exposed pad not present in this variant (unlike HVQFN). Pin 1 index located at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A6 | Hardware I²C address inputs | 7-bit address selection (126 usable combinations); must be pulled HIGH/LOW externally; no internal pull-ups. |
| LED0–LED3 | LED driver outputs | Configurable totem-pole or open-drain; each drives up to 25 mA; logic state determined by LEDOUT register and OE status. |
| OE | Active-low output enable | Asynchronous global control: LOW enables outputs per LEDOUT settings; HIGH forces outputs to programmed state (1, 0, or high-Z). |
| SCL/SDA | I²C bus interface | Fm+ compliant; SDA has 30 mA drive strength; both pins 5.5 V tolerant; internal noise filtering on inputs. |
| VDD/VSS | Power supply rails | VDD accepts 2.3–5.5 V; VSS is system ground reference; decoupling capacitor required near VDD pin. |
Key Features
| Feature | Design Value |
|---|---|
| Software Reset (SWRST) | I²C-callable reset (address 0x06) that restores all registers to POR defaults - eliminates need for power cycle during firmware reconfiguration. |
| Group Addressing | One All Call + three Sub Call I²C addresses allow simultaneous control of arbitrary device groups (e.g., all red LEDs across multiple PCA9633PW,112 units). |
| Output Update Timing | Configurable update on STOP or ACK command - enables atomic multi-register writes or byte-by-byte updates without visual flicker. |
| Internal Oscillator | 25 MHz on-chip oscillator requires no external crystal or RC network; ensures stable PWM timing independent of system clock. |
| Hot Insertion Support | Robust power sequencing tolerance allows safe insertion/removal while I²C bus remains active - critical for modular display subsystems. |
Applications
| RGB Status Indicators | Keypad Backlight Control |
|---|---|
Use Scenario: Multi-color status feedback on medical handheld devices requiring distinct alert states (e.g., green = ready, red = error, amber = warning). IC Role / Device Role / Timing Role: PCA9633PW,112 independently modulates red, green, and amber LED intensities using 97 kHz individual PWM while synchronizing blink patterns via group PWM. Use Value: Eliminates MCU GPIO and timer overhead; enables smooth color transitions and consistent blink timing across all indicators without CPU polling. |
Use Scenario: Adjustable backlight for QWERTY keypads in ruggedized industrial PDAs operating under variable ambient light. IC Role / Device Role / Timing Role: PCA9633PW,112 drives four parallel LED strings with combined individual brightness (PWM0–PWM3) and global dimming (GRPPWM) for uniform luminance scaling. Use Value: Achieves 256-step dimming resolution with zero MCU intervention; OE pin allows hardware-triggered emergency dimming during battery-save modes. |
| Multi-Device Marquee Effects | Low-Power LCD Backlight |
Use Scenario: Sequential illumination of status LEDs across stacked PCBs in telecom rack management systems. IC Role / Device Role / Timing Role: PCA9633PW,112 units respond to Sub Call addresses to execute coordinated chase patterns; group PWM sets overall animation speed. Use Value: Reduces I²C bus traffic by >70% versus individual addressing; enables real-time pattern updates with single broadcast commands. |
Use Scenario: Energy-conscious backlight for monochrome segment LCDs in battery-powered IoT sensors. IC Role / Device Role / Timing Role: PCA9633PW,112 operates in low-power sleep mode (SLEEP bit = 1) with oscillator disabled; resumes PWM output within 500 µs upon wake command. Use Value: Cuts static current to <1 µA during idle; maintains full 256-step brightness control upon wake without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59116IPWR | 16-channel, 12-bit PWM; no group blink mode; I²C max 400 kHz; no OE pin; 2.3–5.5 V. | Better resolution for high-fidelity lighting; lacks synchronized blinking and hardware enable for multi-device sync. | Select when >4 channels or >256-step precision required; avoid when group blink or OE-driven synchronization is essential. |
| IS31FL3728-QFLS4-TR | 28-channel, 8-bit PWM; 1.7–5.5 V; integrated auto-breathing; no hardware OE; I²C up to 1 MHz. | Higher channel count and built-in breathing effects; no group dimming/blinking separation; no dedicated OE for hardware sync. | Prefer for complex lighting sequences across many LEDs; not suitable where PCA9633PW,112's discrete group control and OE pin are used for deterministic timing. |
Compared with TLC59116IPWR and IS31FL3728-QFLS4-TR, the PCA9633PW,112 uniquely combines 4-channel precision, dual-mode group PWM (dimming vs. blink), and hardware OE for deterministic multi-device synchronization - making it optimal for compact RGBA UIs requiring coordinated visual feedback without MCU resource burden.
Availability
PCA9633PW,112 is available at Aetrix Electronics and suitable for RGB status indicators, keypad backlights, and multi-device marquee effects requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for PCA9633PW,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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The PCA9633 product line delivers compact, I²C-controlled LED drivers targeting space-constrained portable electronics - designed specifically for efficient RGBA mixing, low-software-overhead backlighting, and deterministic multi-device visual coordination.
FAQ
What is the maximum I²C bus speed supported by the PCA9633PW,112?
The PCA9633PW,112 supports Fast-mode Plus (Fm+) I²C operation up to 1 MHz. Its SDA output provides 30 mA drive strength, enabling reliable communication on buses with up to 4000 pF total capacitance - significantly higher than standard Fast-mode (400 kHz) devices. This allows longer trace lengths or more devices per bus without signal integrity degradation.
Does the PCA9633PW,112 support hardware-based LED blinking synchronization across multiple devices?
Yes. The PCA9633PW,112 includes an active-low Output Enable (OE) pin that allows asynchronous, hardware-level synchronization of LED outputs across multiple units. When OE is driven by a common external clock, all connected PCA9633PW,112 devices blink simultaneously - eliminating software timing jitter and ensuring pixel-perfect visual alignment in multi-board systems.
Can the PCA9633PW,112 drive LEDs directly without external transistors?
Yes. The PCA9633PW,112 supports direct LED connection with up to 25 mA per channel at 5 V in totem-pole mode (25 mA sink / 10 mA source) or open-drain mode (25 mA sink). Its outputs are 5.5 V tolerant, and the 2.3–5.5 V supply range matches standard LED forward voltages - eliminating the need for external drivers in most low-to-mid brightness applications.
How many unique I²C addresses can be assigned to PCA9633PW,112 devices on a single bus?
The PCA9633PW,112 provides seven hardware address pins (A0–A6), enabling up to 126 unique I²C slave addresses (2⁷ − 2 reserved addresses). Additionally, it supports one programmable All Call address and three Sub Call addresses - allowing hierarchical group control without consuming additional bus addresses or increasing I²C transaction overhead.
What is the function of the GRPFREQ and GRPPWM registers in the PCA9633PW,112?
The GRPPWM register (0x06) sets the 8-bit group duty cycle (0–99.6%), while GRPFREQ (0x07) programs the group period from 24 Hz to 10.73 s - but only when the DMBLNK bit in MODE2 is set to '1'. When DMBLNK = '0', GRPPWM controls global dimming at fixed 190 Hz and GRPFREQ is ignored. This dual-mode design enables either synchronized brightness scaling or coordinated blinking using the same register pair.
PCA9633PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm 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-TSSOP
PCA9633PW,112 FAQ
1.How can I place an order for PCA9633PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9633PW,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 PCA9633PW,112 reliable?
The price and inventory of PCA9633PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9633PW,112 is usually 5 days.
3.What payment methods are accepted for PCA9633PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9633PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9633PW,112?
PCA9633PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9633PW,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 PCA9633PW,112?
For technical support, including PCA9633PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9633PW,112 requirements.
6.How does Aetrix verify that PCA9633PW,112 is sourced from the original manufacturer or authorized distributors?
All PCA9633PW,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 PCA9633PW,112 meets industry standards.
7.What is the process for return or replacement of PCA9633PW,112?
All PCA9633PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9633PW,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 PCA9633PW,112 part is unused and in its original packaging.
Return procedure for PCA9633PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9633PW,112 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
