SMD, 1 Channel Hall Effect, Open Loop Bidirectional, Current Sensor AC/DC 20A, 5V, 5uS, 80kHz

Switch Mode Power Supply IC, Off-Line Controller, 400mA, 65kHz

EIA RS-485 Transceiver, 5 Mb/s, 1 Driver/1 Receiver, 10 at RS-422, 32 at RS-485, 5V, 2.2 mA