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PCA9554BS3,118

PCA9554BS3,118 Description

The PCA9554BS3,118 from NXP Semiconductors is an 8-bit I²C/SMBus I/O expander designed for efficient bidirectional control of general-purpose I/O (GPIO) in low-voltage systems. Operating within a 2.3V to 5.5V supply range, it supports a 400 kHz clock frequency, making it suitable for high-speed communication in embedded systems. Housed in a compact 16-HVQFN package with tape-and-reel (TR) packaging, it is ideal for space-constrained, surface-mount applications. The device features Power-On Reset (POR) for reliable initialization and includes an interrupt output to signal changes in input states, reducing polling overhead.

PCA9554BS3,118 Features

• 8 configurable I/O pins with 10mA source/25mA sink current capability for driving LEDs or sensors.
• I²C/SMBus-compliant interface (up to 400 kHz) ensures compatibility with standard microcontrollers.
• Interrupt-driven architecture minimizes host processor load by alerting only on input changes.
• Wide voltage range (2.3V–5.5V) supports mixed-voltage systems and battery-powered devices.
• ROHS3 compliant and REACH unaffected, meeting environmental regulations.
• Moisture Sensitivity Level (MSL) 1 ensures robustness for extended storage and handling.

PCA9554BS3,118 Applications

This I/O expander excels in applications requiring additional GPIOs without microcontroller pin overhead:

• Industrial control systems: Expands I/O for sensor arrays or actuator control.
• Consumer electronics: Manages buttons, switches, or LED backlighting in smart devices.
• Embedded systems: Interfaces with peripherals in IoT nodes or automation controllers.
• Automotive accessories: Controls lighting or non-critical functions in infotainment systems.

Conclusion of PCA9554BS3,118

The PCA9554BS3,118 combines high-speed I²C communication, robust I/O drive strength, and interrupt efficiency, making it a versatile solution for expanding system I/O. Its wide voltage range and compact form factor cater to diverse applications, from portable electronics to industrial automation. While marked as Last Time Buy, its reliability and feature set ensure continued relevance in legacy and new designs requiring scalable GPIO management.