AlGaAs LED optically coupled to a high-speed photodetector transistor

Available now from Mouser stock, Fairchild's HCPL2530 Series high-speed transistor optocouplers target applications such as line receivers, pulse transformer replacement, output interface to CMOS-LSTTL-TTL, and wide-bandwidth analog coupling. The devices consist of an AlGaAs LED optically coupled to a high-speed photodetector transistor. A separate connection for the bias of the photodiode improves the speed by several orders of magnitude over conventional phototransistor optocouplers. This is achieved by reducing the base-collector capacitance of the input transistor. An internal noise shield provides superior common mode rejection of 10kVµs. An improved package allows superior insulation permitting a 480V working voltage compared to industry standard of 220V.