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PCA9554PW,112

PCA9554PW,112 Description

The PCA9554PW,112 is an 8-bit I/O expander from NXP Semiconductors, designed to enhance system flexibility by providing additional GPIO ports via the I2C-bus or SMBus interface. Operating within a 2.3V to 5.5V supply range, it supports clock frequencies up to 400 kHz, making it suitable for low-power and high-speed applications. Housed in a 16-pin TSSOP package, this device is RoHS3 compliant and features Power-On Reset (POR) for reliable initialization. With 8 configurable I/O pins, each capable of sourcing/sinking 10mA (default) or 25mA (max), it is ideal for driving LEDs, sensors, or other peripherals.

PCA9554PW,112 Features

• 8 Bidirectional I/O Pins: Programmable as inputs or outputs with internal pull-up resistors.
• I2C/SMBus Compatible: Supports standard (100 kHz) and fast (400 kHz) modes.
• Interrupt Output: Flags input state changes, reducing MCU polling overhead.
• Wide Voltage Range (2.3V–5.5V): Compatible with 3.3V and 5V systems.
• High Drive Capability: 25mA sink/source current per I/O for robust peripheral control.
• Power-On Reset (POR): Ensures predictable startup conditions.
• Low Standby Current: Optimized for power-sensitive designs.
• Industrial-Grade Reliability: MSL 1 (Unlimited) and REACH Unaffected for harsh environments.

PCA9554PW,112 Applications

• LED Matrix Control: Drives multiple LEDs with adjustable brightness via PWM.
• Sensor Hub Expansion: Interfaces with digital sensors (e.g., temperature, motion) in IoT devices.
• Industrial Automation: Adds GPIOs to PLCs or MCUs for button/switch monitoring.
• Consumer Electronics: Keypad scanning or backlight control in smart appliances.
• Battery-Powered Systems: Low-voltage operation suits portable devices like wearables.

Conclusion of PCA9554PW,112

The PCA9554PW,112 stands out for its balance of performance, flexibility, and cost-efficiency, offering a simple solution for I/O expansion in space-constrained designs. Its interrupt-driven architecture minimizes MCU load, while high drive current ensures compatibility with diverse peripherals. Whether used in industrial control, consumer gadgets, or embedded systems, this I/O expander delivers reliable, scalable connectivity with minimal design overhead.