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NXP Semiconductors PCA9532PW,118
- Part No.:
- PCA9532PW,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9532PW,118.pdf
- Description:
- IC LED DRVR PS I2C 25MA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,791
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Product details
Overview
PCA9532PW,118 from NXP Semiconductors is a 16-bit I²C-bus LED dimmer IC with integrated oscillator, supporting 256-step brightness control and dual programmable blink rates (0.591 Hz to 152 Hz) for RGB color mixing and backlight applications. It features 16 open-drain LED drivers (25 mA per pin, 200 mA total), GPIO capability on unused pins, and operates from 2.3 V to 5.5 V.
For engineers reviewing the PCA9532PW,118 datasheet, PCA9532PW,118 pinout, PCA9532PW,118 application, or PCA9532PW,118 equivalent, this device delivers precise PWM-based LED intensity control without external timing components-critical for space-constrained display interfaces, status indicator systems, and embedded human-machine interface (HMI) designs requiring flicker-free dimming.
Technical Context
The PCA9532PW,118 integrates a dedicated internal oscillator driving two independent PWM channels (BLINK0/BLINK1), each configurable via PSCx (frequency prescaler) and PWMx (duty cycle) registers. Blink periods range from 6.58 ms to 1.69 s, enabling both visible blinking and imperceptible (>100 Hz) dimming modes.
Each of the 16 LEDn outputs functions as a programmable sink driver with three-state control (HIGH-Z/OFF, LOW/ON, PWM0, PWM1) via four LED selector registers (LS0–LS3). The I²C interface supports standard- and fast-mode (up to 400 kHz), includes noise filtering on SCL/SDA, and features hardware reset (active LOW) and power-on reset (POR) with default register initialization to all-zeros.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Speed | Up to 400 kHz Fast-mode-enables rapid configuration of all 16 LEDs in <10 ms without blocking MCU execution. |
| Blink Frequency Range | 0.591 Hz to 152 Hz-supports both user-visible blink signaling and high-frequency dimming (>100 Hz) to eliminate perceptible flicker. |
| Brightness Resolution | 256 steps (8-bit PWM)-provides fine-grained luminance control essential for accurate RGB color blending and smooth backlight ramping. |
| Output Sink Current | 25 mA per LED pin, 200 mA total package limit-directly drives standard LEDs without external drivers; requires current-limiting resistors per channel. |
| Supply Voltage | 2.3 V to 5.5 V-ensures compatibility with 3.3 V and 5 V logic domains and mixed-voltage system designs. |
| Standby Current | 2.1 µA typical at 5.5 V-minimizes quiescent power in battery-powered or always-on indicator applications. |
| ESD Rating | 2000 V HBM, 150 V MM, 1000 V CDM-meets industrial-grade robustness requirements for handling and board-level reliability. |
Pinout & Package
TSSOP24 package (SOT355-1): 24-pin plastic thin shrink small outline, 4.4 mm body width, lead pitch 0.65 mm, exposed pad not present (unlike HVQFN). Compatible with standard reflow profiles and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | I²C slave address inputs | Hardware-selectable 3-bit address (000–111); enables up to eight PCA9532 devices on same bus without software arbitration. |
| LED0–LED15 | Open-drain LED sink outputs / GPIOs | Configurable per pin: OFF (high-Z), ON (LOW), BLINK0, or BLINK1; unused pins serve as level-sensitive GPIOs with input readback via INPUT0/INPUT1. |
| SCL / SDA | I²C serial clock/data lines | Bus-compatible with SMBus; include internal noise filters; require external pull-ups to VDD (typically 4.7 kΩ). |
| RESET | Active LOW hardware reset | Asynchronous reset forcing all registers to default state (all outputs OFF); requires external pull-up if left unconnected. |
| VDD / VSS | Power supply / ground | Single-supply operation; VSS must be solidly connected to system ground; no separate analog/digital ground pins. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM engines | Two fully programmable blink rates (PSC0/PWM0 and PSC1/PWM1) allow simultaneous dimming and blinking-e.g., status LED pulsing while backlight remains steady. |
| No external timing components | On-chip oscillator eliminates need for crystals, RC networks, or external clocks-reducing BOM count and PCB footprint in compact HMI modules. |
| GPIO reuse capability | Any LEDn pin can be repurposed as input (with external pull-up) or output (open-drain), enabling flexible I/O expansion for pushbuttons, sensors, or alarm flags without adding discrete buffers. |
| Flicker-free dimming | Programmable >100 Hz blink rate ensures PWM-driven LEDs appear continuously lit-critical for medical displays, automotive dashboards, and consumer electronics UIs. |
| Robust bus interface | I²C noise filtering, controlled edge rates, and hot-insertion support prevent communication errors during power sequencing or noisy EMI environments. |
Applications
| RGB Status Indicators | Backlight Control |
|---|---|
|
Use Scenario: Multi-color status LEDs on industrial PLC panels indicating run/fault/warning states via precise hue and intensity. IC Role / Device Role / Timing Role: PCA9532PW,118 acts as centralized LED controller, generating synchronized PWM signals for red/green/blue channels using BLINK0/BLINK1 registers. Use Value: 256-step resolution enables accurate color reproduction; dual PWM allows independent control of hue (via ratio) and saturation (via overall brightness). |
Use Scenario: Dimmable LCD backlight in portable medical monitors requiring smooth 0–100% luminance ramping and low standby power. IC Role / Device Role / Timing Role: PCA9532PW,118 serves as I²C-addressable backlight driver, sinking current from white LEDs with flicker-free PWM above 120 Hz. Use Value: 25 mA per channel supports common 20 mA LEDs; 2.1 µA standby current extends battery life in handheld diagnostics equipment. |
| Keypad Illumination | HMI Panel I/O Expansion |
|
Use Scenario: Backlit membrane keypad in vending machines where keys illuminate only when active, with adjustable brightness per ambient light. IC Role / Device Role / Timing Role: PCA9532PW,118 drives individual key LEDs using LS0–LS3 registers to assign ON/PWM states based on MCU command. Use Value: Single-command per LED (e.g., "BLINK RATE 1") reduces I²C traffic versus bit-banged GPIO; 256-step dimming adapts to daylight vs. nighttime use. |
Use Scenario: Adding 12 GPIOs to an ARM Cortex-M4-based smart thermostat for HVAC sensor inputs, relay controls, and fan speed feedback. IC Role / Device Role / Timing Role: PCA9532PW,118 provides parallel I/O expansion: LED8–LED15 configured as inputs (read via INPUT1), LED0–LED3 as open-drain outputs. Use Value: Eliminates need for separate I/O expander + LED driver; shared I²C bus simplifies firmware and reduces routing complexity on 4-layer PCB. |
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 LED driver; 7 outputs; no dual-PWM architecture; uses single global blink rate and duty cycle. | Limited to simpler blink patterns; insufficient for independent RGB channel control or mixed dimming+blinking. | Choose TCA6507PWR only for cost-sensitive, low-channel-count applications where dual-rate flexibility is unnecessary. |
| PCA9635PW,118 | 16-bit I²C LED driver with 12-bit PWM (4096 steps); higher current (25 mA per pin, 125 mA/octal); built-in thermal shutdown. | Superior grayscale depth and thermal safety for high-brightness or continuous-duty displays; larger TSSOP28 package. | Choose PCA9635PW,118 when 256-step resolution is insufficient or when driving high-current LEDs in thermally constrained enclosures. |
Compared with TCA6507PWR and PCA9635PW,118, the PCA9532PW,118 uniquely balances dual-PWM flexibility, 256-step precision, and TSSOP24 compactness-making it optimal for mid-complexity HMI lighting where independent blink/dim control is required but 4096-step resolution or thermal protection is not.
Availability
PCA9532PW,118 is available at Aetrix Electronics and suitable for RGB status indicators, LCD backlight control, keypad illumination, and HMI panel I/O expansion requiring stable component supply across industrial, medical, and consumer design cycles.
Supply support for PCA9532PW,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 low-power mixed-signal design.
The PCA9532 product line was designed specifically for embedded LED management-delivering integrated PWM dimming, I²C expandability, and GPIO versatility in a single chip to simplify front-panel lighting and status interface design.
FAQ
What is the maximum number of PCA9532PW,118 devices that can share one I²C bus?
The PCA9532PW,118 supports three hardware address pins (A0, A1, A2), allowing eight unique slave addresses (000 to 111). Therefore, up to eight PCA9532PW,118 units can operate concurrently on a single I²C bus without address conflict, provided each has distinct A0–A2 strap configurations and appropriate pull-up resistor sizing for bus capacitance.
Does PCA9532PW,118 require external components to generate PWM signals?
No, the PCA9532PW,118 contains a fully integrated oscillator and two independent PWM engines (BLINK0 and BLINK1). No external crystal, RC network, or clock source is needed-only external current-limiting resistors for each LED and I²C pull-up resistors on SCL/SDA are required for basic operation.
Can unused LED pins on PCA9532PW,118 be used as general-purpose inputs or outputs?
Yes. Any LEDn pin not assigned to LED driving can be configured as a GPIO: set its LED selector bits to '00' (high-Z) for input mode (read via INPUT0/INPUT1 registers), or drive it LOW ('01') for open-drain output. External pull-up resistors are required for output HIGH functionality, and input leakage is ±1 µA per pin.
What is the minimum blink period achievable with PCA9532PW,118?
The shortest blink period is 6.58 ms, achieved when PSC1 = 0 and PWM1 = 0xFF (duty cycle = 255/256 ≈ 99.6%). This corresponds to a frequency of 152 Hz, well above the human flicker fusion threshold-enabling smooth, imperceptible dimming for backlight and status lighting applications using the PCA9532PW,118.
How does the RESET pin function on PCA9532PW,118?
The RESET pin on PCA9532PW,118 is active LOW and asynchronously initializes all internal registers to their default state (all outputs OFF, all selectors = 00). A pulse width ≥10 ns is sufficient. If unused, it must be pulled HIGH to VDD via an external resistor; failure to do so may cause unpredictable startup behavior or bus lockup during power-up sequences.
PCA9532PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm 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-TSSOP
PCA9532PW,118 FAQ
1.How can I place an order for PCA9532PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9532PW,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 PCA9532PW,118 reliable?
The price and inventory of PCA9532PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9532PW,118 is usually 5 days.
3.What payment methods are accepted for PCA9532PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9532PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9532PW,118?
PCA9532PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9532PW,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 PCA9532PW,118?
For technical support, including PCA9532PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9532PW,118 requirements.
6.How does Aetrix verify that PCA9532PW,118 is sourced from the original manufacturer or authorized distributors?
All PCA9532PW,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 PCA9532PW,118 meets industry standards.
7.What is the process for return or replacement of PCA9532PW,118?
All PCA9532PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9532PW,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 PCA9532PW,118 part is unused and in its original packaging.
Return procedure for PCA9532PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9532PW,118 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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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
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
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