The TLC5940 is a 16 channel PWM unit with 12 bit duty cycle control (0 - 4095), 6 bit current limit control (0 - 63), and a daisy chainable serial interface. It is handy for expanding the number of PWM outputs available.

Features:

• 16 Channels
• 12 bit (4096 steps) Grayscale PWM Control
• Serial Data Interface
• 30MHz Data Transfer Rate
• CMOS Level I/O
• Drive Capability (Constant-Current Sink)
  • 0mA to 60mA (VCC < 3.6V)
  • 0mA to 120mA (VCC > 3.6V)
• 3V to 5.5V VCC

Documents:

• Datasheet
• Arduino Library
• Arduino Example