Phototransistor Hermetic Surface Mount Optocoupler

The OLS2449 is specifically designed for high-reliability applications that require optical isolation in radiation environments such as gamma, neutron, and proton radiation with high current transfer ratio (CTR) and low saturation VCE. Each optocoupler channel consists of an LED and N-P-N silicon phototransistor that is electrically isolated, but optically coupled inside a hermetic 8-pin leadless chip carrier (LCC) package.
The electrical parameters are similar the JEDEC registered 4N49U optocoupler, but with a higher CTR and better CTR degradation characteristics due to radiation exposure.
Features
Same reliable processing and construction as the OLS049, but with a higher current transfer ratio (CTR)
CTR is:
Guaranteed over –55 °C to +100 °C ambient temperature range
High at low LED currents
High BVCEO, 65V minimum
1500 VDC electrical isolation
High-reliability screening is available