PCA9685 Servo Motor 16 Channel Driver

The PCA9685 is a 16-channel, 12-bit PWM servo motor driver controlled via the I²C-bus. Originally designed as an LED controller, its precise pulse width modulation (PWM) capabilities make it an excellent choice for driving servo motors in applications such as robotics, automation, animatronics, and more. With individual control over each of its 16 channels and a resolution of 4096 steps, this driver enables accurate positioning of multiple servo motors simultaneously. Operating on a supply voltage range of 2.3 V to 5.5 V and featuring a user-friendly I²C interface, the PCA9685 integrates seamlessly with popular microcontrollers like Arduino and Raspberry Pi, making it a versatile addition to any electronics project.

PLEASE NOTE: The PWM output pins on this module are capable of sinking a maximum of 25mA or sourcing a maximum of 10mA. Do not attempt to drive high-current devices such as motors, bulbs, etc, directly from these pins as you will risk damaging the module. For servos, power is provided externally via the terminal header and only a small amount of current is drawn by the servo from each PWM pin.

Features:

• 16 Independent PWM Channels: Control up to 16 servo motors with individual precision.
• 12-Bit Resolution: Offers 4096 steps per channel for high-precision servo positioning.
• Programmable PWM Frequency: Adjustable from 24 Hz to 1526 Hz, typically set to 50 Hz for standard servo motors.
• Individual Timing Control: Programmable on and off times for each channel to reduce power surges and mechanical stress.
• I²C-Bus Interface: Supports Fast-mode Plus (Fm+) with speeds up to 1 MHz for efficient communication.
• Scalable Design: 6 hardware address pins allow connection of up to 62 devices on the same I²C-bus.
• Group Control: Software-programmable I²C addresses enable simultaneous control of multiple devices or groups.
• Output Enable Pin: Active LOW Output Enable (OE) pin to easily enable or disable all outputs.
• Internal Oscillator: 25 MHz typical internal oscillator; optional external clock input up to 50 MHz.
• Power Efficiency: Low standby current and support for hot insertion.
• Wide Operating Range: Functions reliably from -40°C to +85°C.