This board/chip uses I2C 7-bit address between 0x60-0x80, selectable with jumpers;Dimensions (no headers or terminal block) 2.5 x 1 x 0.1 (62.5mm x 25.4mm x 3mm);Weight (no headers or terminal block): 5.5grams;Weight (with 3x4 headers & terminal block): 9grams;i2c-controlled PWM driver with a built in clock

• Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C interface - PCA9685

Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C interface - PCA9685Little Blue Pigs