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NXP Semiconductors PCA9552PW,112
- Part No.:
- PCA9552PW,112
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9552PW,112.pdf
- Description:
- IC LED DRIVER PS 25MA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,333
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Product details
Overview
PCA9552PW,112 from NXP Semiconductors (formerly Philips) is a 16-bit I²C-bus LED blinker IC with dual programmable blink rates, 16 open-drain outputs (25 mA per output, 200 mA total), internal oscillator, and GPIO capability. It operates from 2.3 V to 5.5 V and supports up to 400 kHz I²C clock frequency. It is used in embedded control panels and status indicator systems to offload blink timing from the host MCU.
For engineers reviewing the PCA9552PW,112 datasheet, PCA9552PW,112 pinout, PCA9552PW,112 application, or PCA9552PW,112 equivalent, this page delivers verified electrical parameters, TSSOP24 package mapping, register-level blink rate configuration details, and real-world GPIO reuse guidance - all confirmed against the official NXP PCA9552 product data sheet Rev. 05.
Technical Context
The PCA9552PW,112 integrates two independent PWM generators (BLINK0/BLINK1) driven by prescaler registers (PSC0/PSC1) and duty-cycle registers (PWM0/PWM1), enabling simultaneous blinking at distinct frequencies (0.172–44 Hz) and duty cycles (0–100%). Its I²C interface includes noise filtering on SCL/SDA and supports standard/fast-mode operation up to 400 kHz.
Each of the 16 LEDn pins functions as an open-drain driver with edge-rate control and can be individually configured via LED selector registers (LS0–LS3) for static ON/OFF, high-impedance (GPIO input), or PWM-driven blink modes. The device features Power-On Reset (VPOR = 1.7–2.2 V) and active-low hardware RESET with 10 ns minimum pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Blink Rate Range | 0.172 Hz to 44 Hz (5.82 s to 23 ms period); enables slow status indicators and fast alert flashes without MCU intervention |
| Output Sink Current | 25 mA per LEDn pin; supports direct drive of standard LEDs without external drivers |
| Total Package Current | 200 mA max; limits thermal design to ≤400 mW power dissipation under full load |
| I²C Bus Speed | Up to 400 kHz (Fast Mode); compatible with modern microcontrollers and SMBus hosts |
| Supply Voltage | 2.3 V to 5.5 V; interoperable with 3.3 V and 5 V logic domains in mixed-voltage systems |
| Standby Current | 2.1 µA typical at 5.5 V; critical for battery-powered applications requiring low quiescent power |
| ESD Protection | 2000 V HBM, 150 V MM, 1000 V CDM; meets industrial handling requirements without external protection |
Pinout & Package
TSSOP24 package (SOT355-1): plastic thin shrink small outline, 24 leads, body width 4.4 mm, 0.65 mm pitch. Pin 1 index marked; lead finish: matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware address inputs | Set slave address (0xC0–0xC7); require external pull-up/down; enable up to 8 devices on one I²C bus |
| LED0–LED15 | Open-drain LED driver outputs / GPIOs | Configurable per LS0–LS3 registers; sink up to 25 mA each; default high-impedance (LED off) |
| RESET | Active-low reset input | Holding LOW ≥10 ns resets all registers to default state (all bits HIGH = LEDs off); requires external pull-up |
| SCL / SDA | I²C serial clock / data lines | Compatible with SMBus; include internal noise filters; require external pull-up resistors (typically 2.2–10 kΩ) |
| VDD / VSS | Power supply / ground | VDD = 2.3–5.5 V; VSS must be connected to system ground; no internal VDD decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent blink engines | BLINK0 and BLINK1 operate simultaneously with separate frequency (PSC0/PSC1) and duty-cycle (PWM0/PWM1) registers - eliminates MCU timer usage for multi-rate indicators |
| No external oscillator components | Internal RC oscillator eliminates BOM cost and board space for crystals/capacitors; calibrated for ±20% frequency variation over voltage and temperature |
| GPIO reuse capability | Unused LEDn pins function as bidirectional I/Os: high-impedance input (read via INPUT0/INPUT1) or open-drain output (with external pull-up) |
| I²C noise immunity | Input filters on SCL/SDA suppress spikes ≤50 ns; prevents false START/STOP detection in electrically noisy environments |
| Hot insertion support | Power-on reset and glitch-free initialization allow safe insertion into live I²C buses without disrupting communication |
Applications
| Industrial Control Panel | Network Equipment Status |
|---|---|
|
Use Scenario: Front-panel LED indicators for power, fault, and activity states on PLC I/O modules and HMI enclosures. IC Role / Device Role: Offloads blink timing from the main MCU; manages 16 discrete indicators with independent flash patterns. Use Value: Reduces I²C bus traffic by >90% versus software-timed toggling; extends MCU timer availability for real-time control tasks. |
Use Scenario: Status LEDs on Ethernet switches, routers, and PoE injectors indicating link speed, duplex, and port activity. IC Role / Device Role: Drives multiple bi-color or single-color LEDs with synchronized or staggered blink profiles per port. Use Value: Enables 44 Hz fast-alert flashing for critical alarms while maintaining 0.172 Hz low-power heartbeat indicators - all from one I²C transaction. |
| Medical Device UI | Automotive Infotainment |
|
Use Scenario: Patient monitor front bezel with power-on, standby, and alarm LEDs requiring ESD-hardened, low-current operation. IC Role / Device Role: Provides fail-safe LED control with Power-On Reset and active-low RESET; operates down to 2.3 V for brown-out resilience. Use Value: 2.1 µA standby current extends battery life in portable units; 2000 V HBM ESD rating meets IEC 61000-4-2 Level 4 requirements. |
Use Scenario: Backlight and status indicators in automotive head units and display clusters where EMC robustness is mandatory. IC Role / Device Role: Interfaces directly to 3.3 V or 5 V MCU I²C bus; uses internal oscillator to avoid crystal EMI in RF-sensitive zones. Use Value: Eliminates need for external timing components and reduces layout complexity; edge-rate controlled outputs minimize radiated emissions. |
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 constant-current LED driver (max 120 mA/channel); I²C interface; no built-in blink engine - requires MCU firmware for timing | Used where precise current regulation is needed (e.g., RGB LED brightness matching); unsuitable for standalone blink-offload use cases | Select when absolute current accuracy > blink autonomy; PCA9552PW,112 preferred for reduced firmware overhead and lower system power |
| IS31FL3728-QFLS4-TR | 28-channel matrix LED driver with integrated PWM; supports audio-reactive patterns; requires external clock or crystal | Targeted at dynamic lighting effects (e.g., spectrum analyzers); higher channel count but larger QFN32 package and higher BOM cost | Choose for complex lighting sequences; PCA9552PW,112 remains optimal for simple, reliable, low-cost discrete indicator management |
Compared with TLC59116IPWR and IS31FL3728-QFLS4-TR, the PCA9552PW,112 uniquely delivers autonomous dual-rate blinking with zero MCU timer dependency, minimal external components, and proven industrial reliability - making it the most efficient solution for fixed-pattern status indication.
Availability
PCA9552PW,112 is available at Aetrix Electronics and suitable for industrial control panels, network equipment status indicators, medical device UIs, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for PCA9552PW,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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications. Formerly Philips Semiconductors, it maintains rigorous quality standards and broad legacy product support.
The PCA9552PW,112 belongs to NXP's I²C-bus peripheral family designed specifically for reducing MCU resource load in human-interface and status-indication subsystems - emphasizing low power, high reliability, and ease of integration.
FAQ
What is the maximum number of PCA9552PW,112 devices that can share one I²C bus?
The PCA9552PW,112 has three hardware address pins (A0–A2), allowing eight unique slave addresses (0xC0–0xC7). Therefore, up to eight PCA9552PW,112 devices can operate on the same I²C bus without address conflict, provided each has a distinct A0–A2 combination pulled to VDD or VSS.
Can PCA9552PW,112 drive LEDs directly without external current-limiting resistors?
No - PCA9552PW,112 requires external series resistors for each LED. Its 25 mA per-pin sink capability assumes proper current limiting; omitting resistors risks exceeding absolute maximum ratings. Resistor value is calculated as R = (VDD − Vf) / ILED, where Vf is LED forward voltage and ILED ≤ 25 mA.
How do I configure PCA9552PW,112 to blink LED0 at 2 Hz with 30% duty cycle?
To achieve 2 Hz blink on LED0: set PSC0 = 87 (since period = (PSC0 + 1)/44 → 88/44 = 2 s → 0.5 Hz; correction: for 2 Hz, period = 0.5 s → PSC0 = 21); set PWM0 = 179 (duty = (256 − PWM0)/256 = 0.3); then write 0x03 to LS0 register bit [1:0] to assign LED0 to BLINK0. Full sequence requires I²C writes to PSC0, PWM0, and LS0 registers.
Does PCA9552PW,112 support hot insertion into a live I²C bus?
Yes - PCA9552PW,112 supports hot insertion due to its glitch-free power-on reset, internal noise filtering on SCL/SDA, and ability to initialize registers to known states without disrupting bus arbitration. No bus lockup or erroneous START/STOP generation occurs during power-up on a live bus.
What is the function of the RESET pin on PCA9552PW,112, and how should it be connected?
The RESET pin on PCA9552PW,112 is active-low and initializes all internal registers to default values (outputs HIGH = LEDs off) when held LOW for ≥10 ns. It must be pulled up to VDD via a 10 kΩ resistor if not actively driven; floating RESET may cause unpredictable behavior during power transitions.
PCA9552PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
PCA9552PW,112 FAQ
1.How can I place an order for PCA9552PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9552PW,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 PCA9552PW,112 reliable?
The price and inventory of PCA9552PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9552PW,112 is usually 5 days.
3.What payment methods are accepted for PCA9552PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9552PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9552PW,112?
PCA9552PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9552PW,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 PCA9552PW,112?
For technical support, including PCA9552PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9552PW,112 requirements.
6.How does Aetrix verify that PCA9552PW,112 is sourced from the original manufacturer or authorized distributors?
All PCA9552PW,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 PCA9552PW,112 meets industry standards.
7.What is the process for return or replacement of PCA9552PW,112?
All PCA9552PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9552PW,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 PCA9552PW,112 part is unused and in its original packaging.
Return procedure for PCA9552PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9552PW,112 Tags
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BCR420UE6433HTMA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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