The TLP732 is an optically coupled isolator containing a GaAlAs LED on the input side and a phototransistor on the output side. It is designed for use in digital logic systems, signal transmission between circuits of different potentials, and isolation of high-voltage circuits.

Features:
-Isolation voltage: 5000Vrms
-High common mode transient immunity: 10kV/μs
-High speed: tpLH/tpHL=2.2/2.2μs (VCC=5V)
-Low input current: 0.5mA (VCC=5V)
-Low output saturation voltage: 0.4V (Ic=2mA)
-High collector-emitter voltage: 80V

Applications:
-Digital logic systems
-Signal transmission between circuits of different potentials
-Isolation of high-voltage circuits
(For reference only)
https://www.utsource.net/itm/p/158436.html