VTL5C3 optocoupler LED+LDR

Optocoupler, commonly used in audio equipment such as analog synthesizers, tremolo units and compressors. Also known as vactrols.
The resistance on the output decreases as the LED lights up.

* Max current (LED): 40mA
* Voltage drop (LED): 2.5V /16mA
* Max Voltage (LDR): 60V
* Max power dissipation (LDR): 50mW
* Resistance (on/off): ~6kOhm / 10MOhm
* Rise time: 2.5ms
* Fall time: 35ms