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HomeProductsIntegrated Circuits (ICs)Specialized ICsPCA9555D,118
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PCA9555D,118 - NXP Semiconductors

Manufacturer Part Number
PCA9555D,118
Manufacturer
NXP Semiconductors
Allelco Part Number
41D-PCA9555D,118
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
5,230 pcs available, New & Original
Parts Description
SO-24
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
Compare
Our certification
In stock: 5230
  • Unit Price: $2.18
  • Subtotal: $0.00

Want a better price?
Add to Cart and Submit RFQ now, we'll contact you immediately.

Quantity Unit Price Ext. Price
1+ $2.18 $2.18
10+ $1.58 $15.80
30+ $1.214 $36.42
100+ $0.906 $90.60
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

PCA9555D,118 Tech Specifications
NXP Semiconductors - PCA9555D,118 technical specifications, attributes, parameters and parts with similar specifications to NXP Semiconductors - PCA9555D,118

Product Attribute Attribute Value
Part Number PCA9555D,118
Package SO-24
Description SO-24
Stock Condition Get 5230 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer NXP Semiconductors
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Parts Introduction

Manufacturer Part Number

PCA9555D,118

Manufacturer

nxp-semiconductors

Introduction

The PCA9555D,118 is a 16-bit remote I/O expander with I2C-bus/SMBus interface. It is designed to provide additional digital input/output ports for microcontroller-based systems, allowing easy expansion of I/O signals. This device offers a flexible and scalable solution for a wide range of applications that require additional digital I/O capabilities.

Product Features and Performance

16-bit remote I/O expander with I2C-bus/SMBus interface

Supports both input and output functionality

Interrupt output for system notification

Power-On Reset (POR) function

Push-pull output drivers

Output current capability of 10mA/25mA

Operating frequency up to 400kHz

Wide operating voltage range of 2.3V to 5.5V

Operating temperature range of -40°C to 85°C

Product Advantages

Flexible and scalable I/O expansion solution

Ease of integration with microcontroller-based systems

Supports both input and output functionality

Interrupt output for efficient system monitoring

Robust and reliable operation with POR function

Wide operating voltage and temperature range

Key Reasons to Choose This Product

Comprehensive I/O expansion capabilities

Easy integration and cost-effective solution

Reliable and robust performance

Suitable for a wide range of applications

Backed by NXP Semiconductors' expertise and support

Quality and Safety Features

Compliance with industry standards

Rigorous quality control and testing

Designed for reliable and safe operation

Compatibility

The PCA9555D,118 is compatible with various microcontroller-based systems and can be easily integrated into a wide range of applications.

Application Areas

Industrial automation and control systems

Home automation and smart home devices

Automotive electronics

Medical and healthcare equipment

Robotics and IoT applications

Product Lifecycle

The PCA9555D,118 is an active product in our website's sales team's portfolio. There are no immediate plans for discontinuation, and equivalent or alternative models are available. Customers are advised to contact our website's sales team for the most up-to-date information and availability of this product or any potential alternative solutions.

Frequently Asked Questions(FAQ)

How does the PCA9555D,118 compare to other I/O expanders in terms of current sourcing and sinking capabilities for driving LED arrays or relay coils?
The PCA9555D,118 provides a source/sink current rating of 10 mA per pin with a total package capability of up to 25 mA, which is sufficient for directly driving low-power LEDs or small signal relays without additional buffering. This makes it suitable for applications where simplicity and integration are prioritized over high-current switching.
What design considerations should be made when using the PCA9555D,118 at the upper end of its supply voltage range, such as 5.5 V, especially in automotive environments?
At 5.5 V operation, the PCA9555D,118 remains within its absolute maximum rating but approaches the edge of typical I2C bus compatibility with 3.3 V logic devices. Careful attention must be paid to level shifting if interfacing with lower-voltage microcontrollers, and noise immunity should be evaluated due to higher rail transients common in automotive systems.
Can the PCA9555D,118 be used reliably in industrial control systems operating across the full -40°C to +85°C temperature range?
Yes, the PCA9555D,118 is specified for operation from -40°C to +85°C, making it suitable for industrial environments. However, long-term reliability under thermal cycling requires adherence to proper PCB layout practices, including adequate trace width for power delivery and avoidance of thermal stress concentrations near the SOIC-24 package.
How does the interrupt feature of the PCA9555D,118 improve system efficiency compared to polling multiple GPIO lines?
Instead of continuously polling each of the 16 I/O pins, the PCA9555D,118 can generate an active-low interrupt output upon detecting changes on any configured pin. This reduces CPU load by allowing the host microcontroller to sleep until a state change occurs, improving power efficiency and response latency in battery-powered or real-time embedded systems.
In what scenarios would the PCA9555D,118 be preferred over discrete transistor-based I/O expansion solutions?
The PCA9555D,118 offers superior space savings, simplified firmware development, built-in protection features like power-on reset (POR), and precise digital control—advantages that outweigh the minimal cost difference in compact designs such as sensor hubs, display backplanes, or peripheral management units.
What limitations should engineers consider when cascading multiple PCA9555D,118 devices on a shared I2C bus?
While the PCA9555D,118 supports standard 400 kHz I2C communication, cascading multiple units increases bus capacitance and may require pull-up resistors to be adjusted for signal integrity. Additionally, addressing conflicts must be managed through unique hardware address settings, and timing budgets become tighter with longer traces.
How does the Moisture Sensitivity Level (MSL) of 1 for the PCA9555D,118 affect manufacturing handling and shelf life?
With an MSL rating of 1, the PCA9555D,118 is considered non-hygroscopic and can be stored indefinitely under normal conditions without requiring bake-out before reflow soldering. This simplifies inventory management and reduces production delays in high-volume assembly lines.
What role does the Power-On Reset (POR) feature play in ensuring robust initialization during system boot?
The POR circuitry in the PCA9555D,118 ensures all internal registers default to a known state when power is applied, preventing undefined behavior during startup. This is critical in safety-critical or multi-device systems where misconfiguration could lead to unintended outputs or bus contention.
Is the PCA9555D,118 suitable for use in space-constrained portable medical devices?
Its 24-pin SOIC package occupies relatively little board area, and the wide supply range (2.3–5.5 V) accommodates various battery chemistries. Combined with low quiescent current and reliable I2C communication, the PCA9555D,118 meets many requirements for compact medical instrumentation, though full compliance with relevant medical standards must still be verified separately.
How does the push-pull output configuration of the PCA9555D,118 benefit motor control applications?
Push-pull outputs allow the PCA9555D,118 to actively drive both high and low levels on connected loads, enabling faster switching and bidirectional current flow compared to open-drain alternatives. This is advantageous in driving MOSFET gates or stepper motor coils where quick transitions reduce inductive kickback and improve efficiency.
What impact does the 7.50 mm SOIC footprint have on thermal performance in dense PCBs?
The 24-SOIC (0.295", 7.50mm width) package has limited exposed thermal pad and poor heat dissipation compared to QFN or DIP alternatives. In high-current applications exceeding 50 mA aggregate, supplementary thermal vias or localized copper pours may be necessary to prevent thermal throttling or failure.
Can the PCA9555D,118 operate safely in environments with electromagnetic interference (EMI)?
The device itself does not include advanced EMI filtering, so external measures—such as series termination resistors, proper grounding, and decoupling capacitors near VCC/GND pins—are essential when deployed in electrically noisy environments like motor drives or wireless modules.
How does the choice between Cut Tape (CT) and Digi-Reel® packaging affect procurement lead times for the PCA9555D,118?
Both CT and Digi-Reel® formats are standard for automated assembly, but Digi-Reel® typically offers better protection during shipping and easier handling in pick-and-place machines. Distributors often stock more SKUs in reel format, potentially reducing restock time for high-volume orders.
What trade-offs exist between using the PCA9555D,118 versus a dedicated shift register like the 74HC595 for simple GPIO expansion?
The PCA9555D,118 uses intelligent serial communication (I2C) and supports interrupts, whereas the 74HC595 relies on SPI-like parallel loading and lacks feedback. While the PCA9555D,118 consumes slightly more power, it reduces pin count on the host MCU and enables dynamic reconfiguration—beneficial in complex systems.
How does the RoHS3 compliance status of the PCA9555D,118 influence global regulatory acceptance?
RoHS3 compliance confirms the component meets current European Union directives regarding hazardous substances, facilitating market access in regulated industries such as consumer electronics and telecommunications without requiring additional material documentation.
What precautions are needed when connecting the interrupt output of the PCA9555D,118 to a 3.3 V microcontroller running at 2.3 V?
Since the interrupt output is open-drain, it inherently supports mixed-voltage interfaces. A pull-up resistor to the microcontroller’s supply rail (e.g., 3.3 V) ensures correct logic levels, while ESD protection diodes in the PCA9555D,118 guard against transient overshoots during hot-plug events.
Why might the base product number PCA9555 be referenced instead of the full PCA9555D,118 part number in BOMs?
Designers often use the base number (PCA9555) in schematics and bills of materials to simplify version tracking, as minor packaging or marking differences (like “D,118”) do not affect electrical behavior. However, the complete part number must always appear in procurement documents to ensure correct ordering.
How does the absence of an integrated oscillator affect clocking flexibility in the PCA9555D,118?
As a pure slave device, the PCA9555D,118 derives all timing from the I2C master clock, eliminating the need for an internal oscillator. This reduces component count and cost but means system-wide timing accuracy depends entirely on the host controller’s clock stability.

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
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Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
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Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
NXP Semiconductors

PCA9555D,118

NXP Semiconductors
41D-PCA9555D,118

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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