WM8761CBGED/R

The HCPL-0370/3700 and HCPL-3760 are voltage/current threshold detection optocouplers. The HCPL-3760 is
a low-current version of the HCPL-0370/3700. To obtain
lower current operation, the HCPL-3760 uses a high-efficiency AlGaAs LED which provides higher light output at
lower drive currents. The devices utilize threshold sensing input buffer ICs which permit control of threshold
levels over a wide range of input voltages with a single
external resistor.
The input buffer incorporates several features: hysteresis
for extra noise immunity and switching immunity, a diode bridge for easy use with ac input signals, and internal clamping diodes to protect the buffer and LED from
a wide range of over-voltage and over-current transients.
Because threshold sensing is done prior to driving the
LED, variations in optical coupling from the LED to the
detector will have no effect on the threshold levels.