ET9571 Overview
These devices are specifically designed as receiver circuits for the phototransistor signals available in some optical encoders. Connect the emitters of the phototransistors to the input pins, with the collectors connected to Vcc. The inputs have 330 ohm resistors to terminate the phototransistors in an emitter follower mode.
ET9571 Key Features
- Supply Voltage Range 4.5V to 30V Designed for phototransistor inputs Index channel gated by A and B Current sink for LED