PCA9555BS,118: High-Performance 16-Bit I2C/SMBus I/O Expander IC | NXP USA Inc.
PCA9555BS,118: High-Performance I2C/SMBus 16-Bit I/O Expander IC by NXP USA Inc.
The PCA9555BS,118 is a cutting-edge 16-bit I/O expander IC manufactured by NXP USA Inc., designed to deliver exceptional performance in I2C and SMBus communication systems. This versatile Interface - I/O Expander is engineered to provide reliable GPIO expansion for microcontroller-based designs across industrial, consumer, and embedded applications. Below, we explore its advanced features, technical specifications, and real-world use cases to demonstrate why it's a top choice for engineers worldwide.
Comprehensive Product Overview
As an active component in NXP's interface portfolio, the PCA9555BS,118 excels in parallel I/O expansion for low-voltage systems. Its 24-HVQFN (4x4) package combines compactness with superior thermal performance, while its -40 C to 85 C operating range ensures reliability in harsh environments.
Enhanced Technical Specifications
- Advanced I/O Configuration: 16 fully programmable GPIO pins with individual input/output selection
- Dual-Protocol Support: Seamless integration with both I2C (up to 400kHz) and SMBus v2.0 standards
- Intelligent Interrupt System: Configurable interrupt output pin for efficient event-driven designs
- Robust Power Management: Wide 2.3V to 5.5V operating range with Power-On Reset (POR) functionality
- High-Current Drive: 25mA sink capability per I/O pin for direct LED driving
- ESD Protection: >2000V HBM protection for enhanced durability
- Package Options: Available in space-saving 24-VFQFN Exposed Pad and 24-TSSOP variants
Industry-Leading Applications
The PCA9555BS,118's versatility enables transformative solutions across multiple sectors:
- Industrial Control Systems:
- Machine automation with multi-sensor interfaces
- PLC I/O expansion modules
- HMI panel control circuits
- Smart Home Technology:
- Appliance control boards
- Lighting system controllers
- Security system keypads
- Consumer Electronics:
- Gaming peripheral interfaces
- Smart TV control systems
- Wearable device expansion
- Automotive Electronics:
- In-vehicle infotainment controls
- Dashboard LED drivers
- Climate control interfaces
Competitive Advantages
When compared to similar I/O expanders, the PCA9555BS,118 offers distinct benefits:
| Feature | PCA9555BS,118 | Competitor A | Competitor B |
|---|---|---|---|
| I/O Count | 16 | 8 | 16 |
| Interface Speed | 400kHz | 100kHz | 400kHz |
| Voltage Range | 2.3-5.5V | 3-5V | 1.8-5.5V |
| Interrupt Output | Yes | No | Yes |
| Package Size | 4x4mm | 5x5mm | 4x4mm |
Design Implementation Guide
For optimal performance:
- PCB Layout Recommendations:
- Place decoupling capacitors within 5mm of VCC pin
- Route I2C signals with proper impedance matching
- Utilize thermal vias under exposed pad for heat dissipation
- Software Configuration:
- Initialize all ports during system startup
- Implement proper I2C clock stretching handling
- Configure interrupt mask registers for efficient event handling
Frequently Asked Questions
Q: Can PCA9555BS,118 operate at 1.8V?
A: No, the minimum operating voltage is 2.3V. For 1.8V systems, consider PCA9535.
Q: How many devices can be connected on one I2C bus?
A: Up to 8 devices with configurable address pins (A0-A2).
Q: Is there a migration path from PCA9554?
A: Yes, PCA9555BS,118 offers pin-compatible upgrade with additional features.
Purchasing Information
Available through authorized distributors with the following options:
- Single units for prototyping
- Reel packaging (2500 units) for production
- Evaluation boards for rapid development
For volume pricing and technical support, contact our sales team today. The PCA9555BS,118 is RoHS compliant and meets all international quality standards.
Conclusion
The PCA9555BS,118 represents the pinnacle of I/O expansion technology, combining NXP's proven reliability with advanced features for next-generation designs. Its unparalleled combination of 16-bit programmability, robust communication protocols, and industrial-grade construction makes it the ideal solution for engineers facing I/O limitations in their projects. Whether you're developing IoT devices, industrial controllers, or consumer electronics, this I2C/SMBus expander delivers the performance and flexibility needed to bring your innovations to life.
Visit our product page to download the complete datasheet, application notes, and reference designs. Order samples today and experience the PCA9555BS,118 difference in your next design!