Using only two I2C pins, control 16 free-running PWM outputs, independently and simultaneously.
There's an I2C-controlled PWM driver with a built in clock. That means that, unlike the TLC5940 family, you do not need to continuously send it signal tying up your microcontroller, it’s completely free running! The PWM frequency are adjustable up to about 1.6 KHz and each output have 12-bit of resolution for servos, that means about 4µs resolution at 60Hz update rate.
2-wire I2C protocol
Channel number: 16
Voltage: 5 ~ 10VDC
Connection strip pitch: 2.54 mm
Module dimensions: 60 x 25 x 3 mm
For more info download datasheet.