Texas Instruments

PCA9538DW  

I/O Expanders

PCA9538DW Description

The PCA9538DW is a versatile interface IC chip designed by Texas Instruments, specifically tailored for applications requiring efficient I/O expansion and control. This 8-bit I/O expander is equipped with an I2C and SMBus interface, making it suitable for a wide range of embedded systems and industrial applications. Operating within a voltage range of 2.3V to 5.5V, the PCA9538DW ensures compatibility with various power supply configurations. It supports a clock frequency of up to 400 kHz, enabling fast and reliable data communication. The device features an interrupt output, which allows for efficient handling of asynchronous events, enhancing system responsiveness and performance.

PCA9538DW Features

• I/O Expansion: The PCA9538DW provides 8 programmable I/O lines, offering significant expansion capabilities for systems with limited GPIO availability.
• Power-On Reset (POR): This feature ensures that the device initializes to a known state upon power-up, enhancing system reliability and stability.
• Interrupt Capability: The interrupt output allows the device to signal the microcontroller or processor when a change in I/O state occurs, optimizing system efficiency.
• Supply Voltage Range: The wide operating voltage range of 2.3V to 5.5V makes the PCA9538DW suitable for a variety of applications, from low-power portable devices to industrial systems.
• Current Handling: The device can source up to 10mA and sink up to 25mA per I/O pin, providing robust current handling capabilities for driving various loads.
• Surface Mount Packaging: The surface mount package ensures ease of integration into modern PCB designs, facilitating compact and reliable system construction.
• Compliance and Standards: The PCA9538DW is REACH unaffected and RoHS3 compliant, meeting stringent environmental and safety regulations, making it suitable for global deployment.

PCA9538DW Applications

The PCA9538DW is ideal for applications where I/O expansion and control are critical. Some specific use cases include:

• Embedded Systems: Enhancing the I/O capabilities of microcontrollers in embedded systems, such as IoT devices, smart sensors, and home automation systems.
• Industrial Automation: Controlling and monitoring various industrial processes, where reliable I/O expansion and communication are essential.
• Consumer Electronics: Expanding the functionality of consumer devices, such as smartphones, tablets, and wearables, by providing additional I/O options.
• Automotive Systems: Managing various electronic control units (ECUs) and sensors within vehicles, ensuring efficient data communication and control.
• Medical Devices: Facilitating the control and monitoring of medical equipment, where precision and reliability are paramount.

Conclusion of PCA9538DW

The PCA9538DW from Texas Instruments stands out as a reliable and efficient I/O expander, offering a comprehensive set of features and benefits tailored for modern electronic systems. Its wide operating voltage range, robust current handling capabilities, and interrupt functionality make it a versatile choice for a variety of applications. The device's compliance with environmental and safety standards further enhances its appeal for global deployment. Whether in embedded systems, industrial automation, or consumer electronics, the PCA9538DW provides a robust solution for I/O expansion and control, ensuring enhanced system performance and reliability.

PCA9538DW Documents

Download datasheets and manufacturer documentation for PCA9538DW

Datasheets :

PCA9538      

PCN Obsolescence/ EOL :

Mult Dev EOL 28/Mar/2023      

HTML Datasheet :

PCA9538      

PCN Design/Specification :

Material Set Rev 24/Jan/2016       Design 25/Feb/2022