Optically Coupled Isolator Resists EMI

The MOC8106, MOC8107, and MOC8108 series of optically coupled isolators consist of an infrared light emitting diode and NPN silicon phototransistor in a standard 6-pin DIP with the base pin unconnected for improved noise immunity in high EMI environments. The series provides an alternative for meeting Motorola specifications for products going out of production. Applications are dc motor controllers, industrial systems controllers, and signal transmission between systems of different potentials and impedances. Voltage isolation is 5.3 and 7.5 kVpk with total power dissipation of 200 mW and an operating temperature range of -55ºC to 100ºC. An input diode has a forward current rating of 60 mA, reverse voltage of 6V, and a power dissipation of 120 mW. Output transistor collector-emitter voltage is 70V, the emitter collector is 7V, and power dissipation is 160 mW.