Phototransistor optocoupler OLC049

miniaturesurface-mounted

The OLC049 can be used for large satellite constellation applications that require optical isolation in radiation environments such as gamma, neutron, and proton radiation with a high Current Transfer Ratio (CTR) and low saturation VCE. Each optocoupler consists of an LED and N-P-N silicon phototransistor that is electrically isolated, but optically coupled inside a non-hermetic, four-pin Leadless Chip Carrier (LCC) package. The hermetic surface-mount variant of the OLC049 optocoupler is available as the OLS049, both in a non-screened catalog version as well as a high-reliability screened version. A functional block diagram of the OLC049 is shown in Figure 1. The absolute maximum ratings of the OLC049 are provided in Table 1. Electrical specifications are provided in Table 2. Typical performance characteristics of the OLC049 are illustrated in Figures 2 through 4. A typical switching test circuit is shown in Figure 5 and package dimensions for the OLC049 are provided in Figure 6. Features • Miniature non-hermetic surface-mount package • Radiation tolerant • High CTR guaranteed over –55 °C to +125 °C ambient temperature range • 1000 VDC electrical isolation