From datasheet page 24. Settling time to within the 16-bit accurate range of the DAC8574 is achievable within 10 μs for a full-scale code change at the input. Worst case settling times between ...

An Arduino library for interfacing with 4 and 8-bit I2C GPIO expanders. PCA9534/TCA9534, PCA9536/TCA9536, PCA9537/TCA9537, PCA9554/TCA9554, PCA9556/TCA9556, PCA9557/TCA9557 are supported.

A new fully featured Arduino development board has been created called the Prestissimo Uno+ which is now available to back via Kickstarter with earlybird pledges available from just $20, AUS$28 or ...

[Ricardo] has created an Arduino library to bring the QN8066 to the masses. The chip is rather easy to use – control is handled with a common I2C interface.