NXP Semiconductors

PCA9538PW,118  

I/O Expanders

PCA9538PW,118 Description

The PCA9538PW,118 from NXP Semiconductors is a low-voltage, 8-bit I²C/SMBus I/O expander designed for general-purpose input/output (GPIO) expansion in applications requiring bidirectional data transfer. Operating within a 2.3V to 5.5V supply range, this device is ideal for interfacing with microcontrollers or processors in mixed-voltage systems. With a 400 kHz clock frequency, it ensures efficient communication while supporting 10mA source and 25mA sink current per I/O, making it suitable for driving LEDs or other low-power peripherals. Packaged in a 16-pin TSSOP and available in tape-and-reel (TR) format, it is optimized for automated surface-mount assembly.

PCA9538PW,118 Features

• 8 configurable I/O pins with bidirectional capability, programmable as inputs or outputs via I²C.
• Power-on reset (POR) ensures default state at startup, enhancing system reliability.
• Interrupt output pin signals changes on input ports, reducing polling overhead.
• Wide voltage range (2.3V–5.5V) enables compatibility with 3.3V and 5V systems.
• I²C/SMBus interface with 400 kHz operation for high-speed communication.
• Low power consumption and RoHS3 compliance, meeting environmental standards.
• Industrial-grade ESD protection and REACH unaffected status for robust performance.

PCA9538PW,118 Applications

This I/O expander is ideal for:

• Industrial control systems: Expands GPIOs for sensor arrays or actuator control.
• Consumer electronics: Manages buttons, switches, or LED indicators in smart devices.
• Embedded systems: Interfaces with low-power peripherals in IoT or battery-operated devices.
• Automotive infotainment: Supports auxiliary functions like backlight control or user inputs.
• Medical devices: Provides reliable I/O expansion in portable diagnostic equipment.

Conclusion of PCA9538PW,118

The PCA9538PW,118 stands out for its flexibility, low-voltage operation, and interrupt-driven architecture, reducing MCU workload. Its high sink current capability and wide supply range make it superior to basic GPIO expanders, while features like POR and I²C compatibility ensure system stability. Whether in industrial, consumer, or embedded applications, this device delivers a cost-effective solution for scalable I/O expansion.

PCA9538PW,118 Documents

Download datasheets and manufacturer documentation for PCA9538PW,118

Datasheets :

PCA9538      

PCN Packaging :

All Dev Label Update 15/Dec/2020       Date Code Extended 18/Jul/2013      

HTML Datasheet :

PCA9538      

Environmental Information :

NXP USA Inc REACH       NXP USA Inc RoHS Cert