The PCA9554DB,112 is an Integrated Circuit (IC) component designed by NXP Semiconductors. It is a 8-bit I2C and SMBus I/O expander with an onboard hardware reset.
Key features of the PCA9554DB,112 include:
1. 8-bit I/O Port: The IC has 8 bits (P0 to P7) which can be individually configured as input or output.
2. I2C and SMBus Compatible Interface: It supports both I2C and SMBus serial communication protocols, allowing easy integration with other devices.
3. Input Latch: Each input port has an internal input latch, simplifying the interface with microcontrollers.
4. Active-Low Interrupt Output: The IC provides an active-low interrupt output (INT) that can be configured to indicate a change in input state.
5. Power-On Reset: It features an onboard hardware reset that ensures the outputs are in a known state upon power-up.
6. Low Standby Supply Current: The IC has a low standby supply current of only a few microamperes, making it power-efficient.
7. Software Address Selection: It supports multiple device connections on the same bus by allowing software-selectable address options.
8. Noise Filtering: Input ports can be configured to include programmable noise filtering to ensure reliable operation in noisy environments.
9. Wide Operating Voltage Range: The PCA9554DB,112 can operate in a voltage range of 2.3V to 5.5V, making it compatible with various systems.
Overall, the PCA9554DB,112 is a versatile IC component with an 8-bit I/O expander, I2C/SMBus compatibility, and useful features like input latching, interrupt output, and power-on reset. It is suitable for various applications that require additional input/output ports or signal expansion.
