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PCA9554PW,118

PCA9554PW,118 Description

The PCA9554PW,118 is an 8-bit I²C-bus and SMBus I/O expander from NXP Semiconductors, designed to enhance system flexibility by providing additional GPIO ports. Housed in a 16-pin TSSOP package, it operates within a 2.3V to 5.5V supply range, making it compatible with a wide array of low-voltage and mixed-voltage systems. With a 400 kHz I²C/SMBus interface, it ensures high-speed communication while supporting 10mA source and 25mA sink current per I/O pin, enabling robust drive capabilities for LEDs, sensors, and other peripherals. The device includes Power-On Reset (POR) functionality and an interrupt output for efficient event-driven system designs.

PCA9554PW,118 Features

• 8 configurable I/O pins with individual direction control (input/output).
• I²C/SMBus compatible (up to 400 kHz) with 3 hardware address pins for up to 8 devices on the same bus.
• Low standby current consumption, ideal for power-sensitive applications.
• Interrupt output pin signals changes on input ports, reducing polling overhead.
• Wide voltage range (2.3V–5.5V) ensures compatibility with 3.3V and 5V systems.
• Robust output drive (10mA source, 25mA sink) for direct LED or relay control.
• RoHS3 compliant and REACH unaffected, meeting environmental standards.

PCA9554PW,118 Applications

This I/O expander is ideal for embedded systems requiring additional GPIOs without microcontroller pin overhead. Key applications include:

• Industrial control panels: Expands I/O for button matrices, status LEDs, and sensor interfaces.
• Consumer electronics: Manages keypad inputs, display backlighting, or peripheral control in smart devices.
• Automotive systems: Interfaces with low-voltage sensors and actuators in infotainment or body control modules.
• IoT edge nodes: Provides scalable I/O for sensor hubs and gateway devices.
• LED driving: Directly controls multiple LEDs with programmable dimming via PWM.

Conclusion of PCA9554PW,118

The PCA9554PW,118 combines high-speed I²C interfacing, flexible I/O configuration, and robust drive capability in a compact package. Its low-voltage operation, interrupt-driven architecture, and multi-device support make it a versatile solution for expanding I/O in space-constrained or power-efficient designs. Whether used in industrial automation, consumer gadgets, or automotive systems, this IC delivers reliable performance while simplifying system integration.