Product Overview: PCF8574P,112 from NXP
The PCF8574P,112 is a robust, versatile I/O expander chip designed by NXP Semiconductors. This integrated circuit is part of the PCF8574 series and is particularly useful in scenarios where additional I/O ports are required. It allows a microcontroller to communicate with multiple devices over a simple two-wire bidirectional I2C-bus (Inter-Integrated Circuit bus), which minimizes the need for numerous connections and conserves valuable board space.
With its ability to operate as an interface between the microcontroller and peripheral devices, the PCF8574P,112 significantly expands the available I/O options. This is especially beneficial in applications where the microcontroller has limited I/O pins. The device provides 8-bit quasi-bidirectional I/O ports which can be controlled from the microcontroller, facilitating communication with various peripherals such as keyboards, displays, and other input/output components.
One of the key features of the PCF8574P,112 is its built-in level shifting, which allows it to support voltages from 2.5V to 6V, making it suitable for use with both 3.3V and 5V systems. This level of flexibility ensures that it can be integrated into a wide range of applications without the need for additional level translators.
The device also includes an interrupt line (INT), which can be connected to the interrupt input of a microcontroller. This feature allows the microcontroller to be alerted when input states of the I/O ports change, thereby reducing the need for continuous polling of the I/O expander.
The PCF8574P,112 comes in a DIP-16 (Dual In-line Package) form factor, which is easy to handle and suitable for breadboard prototyping or permanent installation in a printed circuit board. Its operational temperature range of -40°C to +85°C ensures reliable performance in various environmental conditions.
Overall, the PCF8574P,112 from NXP is an excellent choice for designers looking to increase the I/O capabilities of their microcontroller-based systems, while keeping the integrity and efficiency of their design intact. Its ease of use, combined with the power of the I2C-bus, makes it an essential component for expanding system functionality.
