NXP Semiconductors

PCA9538APWJ  

I/O Expanders

PCA9538APWJ Description

The PCA9538APWJ from NXP Semiconductors is a high-performance 8-bit I²C/SMBus I/O expander designed for low-voltage applications. Housed in a compact 16-TSSOP package, it operates within a 1.65V to 5.5V supply range, making it versatile for mixed-voltage systems. With a 400 kHz clock frequency, it ensures efficient communication in I²C/SMBus networks. The device supports 10mA source and 25mA sink current per I/O, enabling robust drive capabilities for LEDs, sensors, and other peripherals. Its interrupt output feature minimizes polling overhead, enhancing system efficiency.

PCA9538APWJ Features

• Low-Voltage Operation: Wide 1.65V–5.5V range for compatibility with modern microcontrollers.
• High-Speed I²C Interface: 400 kHz clock frequency for fast data transfer.
• Strong Drive Capability: 10mA source / 25mA sink current per pin.
• Interrupt Output: Reduces host processor load by signaling pin state changes.
• Power-On Reset (POR): Ensures reliable initialization at startup.
• RoHS3 & REACH Compliant: Meets environmental and safety standards.
• Surface-Mount (TSSOP-16): Ideal for space-constrained PCB designs.

PCA9538APWJ Applications

The PCA9538APWJ excels in applications requiring bidirectional I/O expansion with minimal host interaction:

• Industrial Control Systems: Interface with sensors, buttons, and relays.
• Consumer Electronics: LED dimming, keypad scanning, and display control.
• Embedded Systems: GPIO extension for microcontrollers with limited pins.
• Automotive Infotainment: Low-voltage peripheral management.
• IoT Devices: Efficient power management for battery-operated systems.

Conclusion of PCA9538APWJ

The PCA9538APWJ stands out as a reliable, low-power I/O expander with high drive strength, interrupt support, and broad voltage compatibility. Its small footprint and I²C/SMBus interface make it ideal for modern electronics where space and efficiency are critical. Whether in industrial automation, consumer gadgets, or IoT solutions, this device delivers flexibility, performance, and robustness, outperforming generic GPIO expanders in demanding environments.

PCA9538APWJ Documents

Download datasheets and manufacturer documentation for PCA9538APWJ

Datasheets :

PCA9538A      

PCN Packaging :

All Dev Label Update 15/Dec/2020       Lighter Packing Reels 30/Mar/2014      

Scheme-It :

PCA9538APW Scheme-It®      

HTML Datasheet :

PCA9538A      

Environmental Information :

NXP USA Inc REACH       NXP USA Inc RoHS Cert