4N28 Datasheet PDF - TI

● Compatible With Standard TTL Integrated Circuits

● Gallium Arsenide Diode Infrared Source Optically Coupled to a Silicon N-P-N Phototransistor

● High Direct-Current Transfer Ratio

● High-Voltage Electrical Isolation . . . 2.5-kV, 1.5-kV, or 0.5-kV Rating

● Plastic Dual In-Line Package

● High Speed Switching . . . tr = 2 us, tf = 2 us Typical