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NXP Semiconductors PCA9532D,118
- Part No.:
- PCA9532D,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PCA9532D,118.pdf
- Description:
- IC LED DRIVER PS I2C 25MA 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,359
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Product details
Overview
PCA9532D,118 from NXP Semiconductors is a 16-bit I²C-bus LED dimmer IC with integrated oscillator, two programmable PWM blink rates (0.591–152 Hz), 256-step brightness control, and open-drain LED drivers sinking up to 25 mA per channel. It enables RGB color mixing and backlight dimming in compact displays and UI panels.
For engineers reviewing the PCA9532D,118 datasheet, PCA9532D,118 pinout, PCA9532D,118 application, or PCA9532D,118 equivalent, this device delivers deterministic LED timing control without external components, supports hot insertion and SMBus compatibility, and provides GPIO flexibility for system monitoring and control functions.
Technical Context
The PCA9532D,118 implements dual independent PWM generators-each with a dedicated frequency prescaler (PSC0/PSC1) and duty-cycle register (PWM0/PWM1)-to drive 16 open-drain outputs at user-defined blink rates and intensities. Its internal oscillator eliminates external timing components while maintaining ±20% frequency stability across voltage (2.3–5.5 V) and temperature (−40 °C to +85 °C).
Each LED output is individually configurable via four-state LED selector registers (LS0–LS3): high-impedance (off), active-low (on), PWM0-controlled blink, or PWM1-controlled blink. The I²C interface operates up to 400 kHz, includes noise filtering on SCL/SDA, and supports auto-increment addressing for efficient register access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Clock Frequency | Up to 400 kHz Fast-mode - enables rapid configuration of all 16 LED states in <1 ms. |
| Blink Rate Range | 0.591 Hz to 152 Hz (1.69 s to 6.58 ms period) - supports both visible blinking and imperceptible dimming (>100 Hz). |
| Brightness Resolution | 256 steps (8-bit PWM) - achieves precise analog-like intensity control for RGB mixing and uniform backlight grading. |
| Output Sink Current | 25 mA per LED pin, 100 mA per octal (LED0–7 or LED8–15), 200 mA total - drives standard LEDs directly without external drivers. |
| Supply Voltage Range | 2.3 V to 5.5 V - interoperable with 3.3 V microcontrollers and 5 V legacy systems without level shifting. |
| Standby Current | 2.1 µA typical at 5.5 V - suitable for battery-powered UIs requiring ultra-low quiescent power. |
| ESD Protection | 2000 V HBM, 150 V MM, 1000 V CDM - robust against handling and board-level ESD events in industrial environments. |
Pinout & Package
PCA9532D,118 is supplied in SO24 (SOT137-1) package: plastic small outline, 24 leads, 7.5 mm body width, surface-mount compatible with standard reflow profiles.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware address inputs | Set I²C slave address (3-bit, 8 possible devices per bus); must be externally pulled HIGH/LOW - no internal pull-ups. |
| SDA / SCL | I²C bidirectional data / clock | Open-drain, SMBus-compatible; require external pull-up resistors; include integrated noise filters. |
| RESET | Active-low hardware reset | Asynchronous reset that forces all registers to default (all outputs HIGH/LED off); requires external pull-up if unused. |
| LED0–LED15 | Open-drain LED driver outputs | Each sinks up to 25 mA; configured as LED drivers or GPIOs via LSx registers; LED13–LED15 commonly used as GPIOs per application note. |
| VDD / VSS | Power supply / ground | 2.3–5.5 V operation; VSS must be connected to system ground - critical for proper reset and output behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM engines | Enables simultaneous control of two distinct LED groups (e.g., status + backlight) at different frequencies and intensities without MCU intervention. |
| No external oscillator required | Reduces BOM count and PCB area; eliminates crystal load capacitance tuning and layout sensitivity for timing-critical applications. |
| GPIO reuse capability | Unused LEDn pins function as configurable inputs/outputs - supports push-buttons, alarm flags, or fan tach signals without adding discrete I/O expanders. |
| Controlled edge rates | Minimizes ground bounce and EMI during output switching - critical for noise-sensitive audio or RF subsystems sharing the same PCB. |
| Hot-insertion support | Allows safe connection/disconnection while power is applied - simplifies field-serviceable display modules and modular UI assemblies. |
Applications
| RGB Status Indicator | Backlight Dimming |
|---|---|
|
Use Scenario: Compact front-panel UI with multi-color status feedback (e.g., power-on, fault, standby). IC Role / Device Role / Timing Role: LED dimmer controlling three discrete LEDs (R/G/B) via separate PWM channels to generate >16M colors through 256-step intensity blending. Use Value: Eliminates need for three separate current drivers and MCU PWM timers; reduces firmware overhead by offloading color sequencing to hardware registers. |
Use Scenario: Edge-lit LCD backlight in medical handheld or industrial HMI requiring smooth brightness ramping. IC Role / Device Role / Timing Role: 16-channel constant-current sink driving parallel LED strings; uses BLINK0 at >100 Hz for flicker-free dimming with 256-step resolution. Use Value: Achieves perceptually linear brightness control across 0–100% range using single I²C command - no real-time MCU PWM modulation required. |
| Fan Speed Monitoring | ACPI Power Switch Interface |
|
Use Scenario: Embedded system monitoring cooling fan RPM via tachometer signal while controlling status LEDs. IC Role / Device Role / Timing Role: GPIO mode on LED13–LED15 reads fan tach pulses; LED0–LED7 drive status indicators synchronized to thermal state. Use Value: Integrates sensor input and visual feedback in one device - avoids separate opto-isolator + LED driver solution and saves 3–4 PCB layers. |
Use Scenario: Laptop or embedded PC implementing ACPI-compliant power button and lid switch detection. IC Role / Device Role / Timing Role: Configured as interrupt-capable GPIO expander: LED0–LED3 read mechanical switches; LED4–LED7 drive power-status LEDs with hardware blink control. Use Value: Reduces host CPU wake events by enabling hardware-based blink patterns - extends battery life in suspend-to-RAM states. |
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 expander with 3 PWM channels; no internal oscillator - requires external clock or MCU-driven timing. | Limited to 7 outputs and 3 independent dimming groups; lacks 256-step resolution (max 128 steps). | Choose when lower channel count suffices and system already provides clock source - reduces cost but increases firmware complexity. |
| PCA9635PW | 16-bit I²C LED driver with 12-bit PWM (4096 steps), higher max sink current (25 mA per channel, 125 mA/octal), and built-in grayscale engine. | Supports auto-breathing, group dimming, and LED error detection - suited for premium displays and automotive clusters. | Choose for enhanced visual fidelity and diagnostics; PCA9532D,118 remains optimal for cost-sensitive, fixed-function RGB/backlight where 256 steps meet requirements. |
Compared with TCA6507PWR and PCA9635PW, PCA9532D,118 offers the best balance of integrated timing, 256-step precision, and SO24 footprint for mid-tier UI applications - delivering full hardware blink control without external components or premium pricing.
Availability
PCA9532D,118 is available at Aetrix Electronics and suitable for RGB indicator panels, industrial HMI backlights, fan monitoring interfaces, and ACPI-compliant power management systems requiring stable component supply and long-term manufacturability.
Supply support for PCA9532D,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 peripherals and power-efficient mixed-signal ICs.
The PCA9532D,118 belongs to NXP's I²C-bus I/O expander family, designed specifically to simplify LED control and GPIO expansion in space-constrained, low-power embedded systems - reducing design effort and bill-of-materials cost.
FAQ
What is the maximum number of PCA9532D,118 devices supported on a single I²C bus?
The PCA9532D,118 features three hardware address pins (A0–A2), allowing up to eight unique I²C addresses (1100000b to 1100111b). All eight devices can operate concurrently on the same bus without address conflict, provided each has a distinct A0–A2 combination and appropriate pull-up resistors are used on SDA/SCL.
Can PCA9532D,118 drive LEDs directly without external current-limiting resistors?
No - PCA9532D,118 requires external current-limiting resistors for each LED anode connection. Its open-drain outputs sink current only; the resistor value must be selected based on VDD, LED forward voltage, and desired current (≤25 mA per pin). For example, at VDD = 5 V and VF = 2.1 V, a 115 Ω resistor sets ~25 mA.
How does PCA9532D,118 achieve flicker-free LED dimming?
PCA9532D,118 achieves flicker-free dimming by operating its PWM outputs above 100 Hz (up to 152 Hz), where human persistence of vision prevents perception of blinking. Brightness is controlled solely by duty cycle (PWM0/PWM1 values 0–255), not frequency - enabling smooth, continuous intensity variation without visible artifacts.
What happens to PCA9532D,118 outputs during power-on reset?
During Power-On Reset (POR), all PCA9532D,118 registers initialize to zero, setting all LEDn outputs to high-impedance (LED off) and configuring A0–A2 as inputs. The device remains in reset until VDD reaches VPOR (1.7–2.2 V), ensuring predictable startup behavior and eliminating glitching on connected LEDs or GPIOs.
Is PCA9532D,118 compatible with SMBus hosts?
Yes - PCA9532D,118 is fully SMBus 2.0 compliant: it supports packet error checking (PEC) when enabled, acknowledges SMBus alert responses, and meets all timing and electrical specifications including noise filtering on SCL/SDA inputs and controlled slew rates to prevent bus contention.
PCA9532D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Power Switch
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 2.3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- 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:
- 24-SO
PCA9532D,118 FAQ
1.How can I place an order for PCA9532D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9532D,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 PCA9532D,118 reliable?
The price and inventory of PCA9532D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9532D,118 is usually 5 days.
3.What payment methods are accepted for PCA9532D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9532D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9532D,118?
PCA9532D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9532D,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 PCA9532D,118?
For technical support, including PCA9532D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9532D,118 requirements.
6.How does Aetrix verify that PCA9532D,118 is sourced from the original manufacturer or authorized distributors?
All PCA9532D,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 PCA9532D,118 meets industry standards.
7.What is the process for return or replacement of PCA9532D,118?
All PCA9532D,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9532D,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 PCA9532D,118 part is unused and in its original packaging.
Return procedure for PCA9532D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9532D,118 Tags
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