PCA9685 16 X 12-bit 16-channel 12-bit PWM Driver Controller Servo

16 LED drivers, each output programmable:
turn off
Open
Programmable LED brightness
Programmable group blur (dim) / flicker mixed with independent LED brightness
   1MHz Fast Mode Plus is compatible with I2C bus interface with 30mA high drive capability on SDA to drive high capacitive bus

   4096-level (12-bit) linear programmable brightness from fully off (default) to maximum brightness for each LED output
   Software programmable for open-drain LED output selection (default push-pull) 16 push-pull outputs (25mA sink current and 5mA pull current at 5V), no input function
   The output state can be programmed to change when responding or stopping commands to update all outputs simultaneously or byte-by-byte (default is "stop command change")
   Low effective output enable input pin, when the pin is high, the LED output can be programmed to 0, 1 or high impedance (power-on default is high impedance)
   6 hardware address pins allow 62 PCA9685 devices to be connected to the same I2C bus
   The LED output frequency (all LEDs) is usually 40Hz to 1000Hz (when the oscillator is 25MHz, the default value of the prescaler register is 1EH will generate a refresh rate of 200Hz)
   Four software programmable I2C bus addresses (one LED group call (Call) address and three LED subcall (Call) addresses) allow device groups to be addressed at any one time in any combination (eg, a register is used for " All Calls (All Calls) then all PCA9634 devices on the I2C bus can be addressed at the same time, while the second register is used for three different addresses, then one third of the devices on the bus in a device group can Addressed at the same time), software enabled and disabled I2C bus address
   Software reset feature (SWRST Call) allows the device to be reset via the I2C bus
   25MHz internal crystal oscillator, no external components required
   Maximum external input clock of 50MHz
   Internal power-on reset
   Noise filter at the SDA/SCL input
   Output pin has edge generation rate control
   No glitch output at power up
   Support for hot access

   Low standby current
   Operating voltage range: 2.3V to 5.5V
   Can withstand 5.5V input
   Can work in an environment of minus 40 degrees Celsius to 85 degrees Celsius
   ESD protection exceeds 2000V HBM/JESD22-A114, 200V MM/JESD22-A115 and 1000V CDM/JESD22-C101
   JEDEC standard JESD78 enters lock test when it exceeds 100mA

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