Fletchtronics

Fletchtronics is now offering the first in a series of Complete Solutions, a set of useful components and development boards.

Complete means centralized information. You won't have to search around the web for information about the component. All relevant links and immediately important information will be posted on the product page.

PCA9555 is a 16 bit general purpose serial IO expander from NXP Semiconductors. It speaks I2C/TWI. PCA9555 gives your application 16 more IO pins. Up to eight devices can share the same I2C bus. Therefore you can add up to 128 (16*8) additional outputs and/or inputs, using just two microcontroller pins to control them. This version is DIP-24/600 mil shape, perfect for breadboarding.