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PCA9538PW from NXP,NXP Semiconductors

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PCA9538PW

Manufacturer: NXP

8-bit I虏C-bus and SMBus low power I/O port with interrupt and reset

Partnumber Manufacturer Quantity Availability
PCA9538PW NXP 1102 In Stock

Description and Introduction

8-bit I虏C-bus and SMBus low power I/O port with interrupt and reset The **PCA9538PW** from NXP Semiconductors is a versatile, low-power 8-bit I²C-bus and SMBus I/O expander designed to enhance system flexibility in embedded applications. This CMOS-based device provides general-purpose remote I/O expansion for microcontrollers, enabling efficient control of multiple digital signals via a two-wire serial interface.  

Featuring an operating voltage range of **2.3V to 5.5V**, the PCA9538PW is suitable for both 3.3V and 5V systems. It includes eight configurable GPIO pins that can be individually set as inputs or outputs, with internal pull-up resistors for simplified circuit design. The interrupt output pin allows efficient event-driven processing by signaling input state changes, reducing the need for continuous polling.  

With a **400 kHz I²C interface**, the PCA9538PW ensures fast communication while maintaining low power consumption, making it ideal for battery-powered devices. Its small **TSSOP-16 package** offers a compact footprint for space-constrained designs.  

Common applications include industrial control systems, sensor interfacing, and LED dimming, where additional I/O expansion is required without increasing microcontroller pin count. The PCA9538PW combines reliability, ease of integration, and robust performance, making it a practical choice for modern electronic designs.

Application Scenarios & Design Considerations

8-bit I虏C-bus and SMBus low power I/O port with interrupt and reset
Partnumber Manufacturer Quantity Availability
PCA9538PW TI 50 In Stock

Description and Introduction

8-bit I虏C-bus and SMBus low power I/O port with interrupt and reset The **PCA9538PW** from Texas Instruments is a versatile, low-voltage 8-bit I²C and SMBus I/O expander designed to enhance system flexibility in embedded applications. This CMOS-based device provides general-purpose remote I/O expansion for microcontrollers, enabling efficient control of multiple peripheral devices with minimal pin usage.  

Featuring an I²C-compatible serial interface, the PCA9538PW supports both input and output configurations, allowing bidirectional data flow. Each I/O port can be independently programmed as an input or output, with internal pull-up resistors simplifying circuit design. The device operates at a supply voltage range of 1.65V to 5.5V, making it suitable for mixed-voltage systems.  

Key functionalities include interrupt output for monitoring input changes, reducing the need for continuous polling, and a hardware reset pin for quick initialization. With a low standby current consumption, the PCA9538PW is ideal for power-sensitive applications.  

Available in a TSSOP-16 package, this I/O expander is widely used in industrial control, consumer electronics, and IoT devices where efficient I/O management is critical. Its robust design and compatibility with standard communication protocols ensure seamless integration into diverse embedded systems.  

For detailed specifications and application guidance, consult the official datasheet.

Application Scenarios & Design Considerations

8-bit I虏C-bus and SMBus low power I/O port with interrupt and reset
Partnumber Manufacturer Quantity Availability
PCA9538PW PHI 129 In Stock

Description and Introduction

8-bit I虏C-bus and SMBus low power I/O port with interrupt and reset The **PCA9538PW** from Philips is a versatile **I²C-bus controlled 8-bit I/O expander** designed to enhance the input/output capabilities of microcontrollers and other digital systems. This low-voltage device operates within a **1.65V to 5.5V** range, making it suitable for a wide variety of applications, including industrial controls, consumer electronics, and embedded systems.  

Featuring **8 programmable GPIO pins**, the PCA9538PW can be configured as either inputs or outputs via the I²C interface, providing flexibility in system design. Each pin includes **internal pull-up resistors**, simplifying circuit design by reducing external component requirements. The device supports **interrupt functionality**, allowing efficient monitoring of input changes without continuous polling.  

With a **400kHz I²C-bus interface**, the PCA9538PW ensures fast and reliable communication while maintaining low power consumption. Its compact **TSSOP-16 package** makes it ideal for space-constrained applications. Additionally, the device offers **hot insertion** capability, ensuring stable operation in dynamic environments.  

Engineers favor the PCA9538PW for its **ease of integration**, robust performance, and compatibility with standard I²C protocols. Whether expanding I/O for sensors, switches, or LED control, this component delivers a reliable solution for modern digital systems.

Application Scenarios & Design Considerations

8-bit I虏C-bus and SMBus low power I/O port with interrupt and reset

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