PCA9901 Datasheet - NXP

PCA9901 One Wire Single LED Driver

The PCA9901 is a 20 mA current source for a single LED that allows stand-alone blinking of a predefined pattern to off-load the microcontroller and save battery power. Programming of the device is done through a training sequence: the host controller sends the LED lighting sequence and the PCA9901 m.

PCA9901 Features

* 1 wire interface to control the device

* Stand-alone blinking capability while training the sequence to blink

* Sequence includes up to 3 blinking elements

* 12-bit (4096 steps) LED ON and OFF timings for each blinking element: ON timing is captured between 1 ms a

PCA9901_NXP.pdf