NXP Semiconductors

PCF8574P,112  

I/O Expanders

PCF8574P,112 Description

The PCF8574P,112 is an 8-bit I/O port expander with an I2C interface, designed for use in a wide range of applications requiring additional I/O ports. Manufactured by NXP Semiconductors, this interface IC chip is part of the PCF85 family and is housed in a through-hole package, specifically a Tube. It operates within a supply voltage range of 2.5V to 6V and supports a clock frequency of 100 kHz. The PCF8574P,112 features 8 programmable I/O pins, providing flexibility for various input and output configurations. Each I/O pin can source up to 300µA and sink up to 25mA, making it suitable for driving small loads directly.

The device includes an interrupt output, which allows it to signal the microcontroller when an input state changes, thereby optimizing system performance and reducing polling overhead. Additionally, the PCF8574P,112 incorporates a Power-On Reset (POR) feature, ensuring reliable initialization and stable operation. It is REACH unaffected and RoHS3 compliant, adhering to stringent environmental and safety standards.

PCF8574P,112 Features

• I2C Interface: The PCF8574P,112 utilizes the I2C bus protocol, enabling efficient communication between the microcontroller and the I/O expander with minimal wiring.
• 8 Programmable I/O Pins: Provides flexibility for various input and output configurations, making it suitable for a wide range of applications.
• Interrupt Output: Allows the device to signal the microcontroller when an input state changes, optimizing system performance and reducing polling overhead.
• Power-On Reset (POR): Ensures reliable initialization and stable operation.
• Wide Supply Voltage Range: Operates within a supply voltage range of 2.5V to 6V, providing compatibility with various power supply configurations.
• Low Current Consumption: Each I/O pin can source up to 300µA and sink up to 25mA, making it suitable for driving small loads directly.
• Through-Hole Mounting: The through-hole package ensures robust mechanical stability and ease of installation on printed circuit boards.
• Environmental Compliance: The PCF8574P,112 is REACH unaffected and RoHS3 compliant, adhering to stringent environmental and safety standards.

PCF8574P,112 Applications

The PCF8574P,112 is ideal for applications requiring additional I/O ports with minimal additional components. Its features make it particularly suitable for:

• Embedded Systems: Expanding the I/O capabilities of microcontrollers in embedded systems.
• Home Automation: Controlling and monitoring various devices and sensors in home automation systems.
• Industrial Control: Managing inputs and outputs in industrial control applications, such as PLCs and automation equipment.
• Consumer Electronics: Enhancing the functionality of consumer electronics by providing additional I/O ports for peripherals.
• Automotive Electronics: Supporting various automotive applications, such as dashboard controls and sensor interfaces.

Conclusion of PCF8574P,112

The PCF8574P,112 is a versatile and reliable I/O port expander that offers significant benefits for applications requiring additional I/O capabilities. Its I2C interface, wide supply voltage range, and low current consumption make it an efficient and practical solution. The inclusion of an interrupt output and Power-On Reset (POR) feature further enhances its performance and reliability. While the product is marked as obsolete, its robust design and compliance with environmental standards ensure it remains a viable option for existing systems and legacy applications.

PCF8574P,112 Documents

Download datasheets and manufacturer documentation for PCF8574P,112

Datasheets :

PCF8574      

PCN Packaging :

All Dev Label Update 15/Dec/2020      

PCN Obsolescence/ EOL :

Multiple Devices 03/Jul/2013      

HTML Datasheet :

PCF8574      

Environmental Information :

NXP USA Inc REACH       NXP USA Inc RoHS Cert