The HCPL-7840-560E is an optically isolated amplifier manufactured by Broadcom. It is a 4.5 - 5.5 SV 8 dB amplifier. This device is used to provide electrical isolation between two circuits, while preserving any signals transmitted between the two. The optical isolation feature ensures that any electrical noise or spikes on one of the circuits is not transferred to the other circuit. The HCPL-7840-560E supports a wide range of amplitudes from 4.5 to 5.5 volts and is capable of providing 8 dB gain. It has an input impedance of 30 kO and an output impedance of 5 kO. Additionally, the device is RoHS and WEEE compliant, making it suitable for use with a variety of applications.