OLS0449

Radiation-Tolerant Phototransistor, Hermetic Surface-Mount Optocoupler

The OLS0449 and OLS2449 are specifically designed for low input current applications that require optical isolation in radiation environments such as gamma, neutron, and proton radiation with a high CTR and low saturation V_CE.

Each optocoupler consists of an LED and NPN silicon phototransistor that is electrically isolated, but optically coupled inside a hermetic package.

The OLS0449 is a single-channel device in a 4-pin (LCC4) while the OLS2449 is a dual-channel device in an 8-pin (LCC8) package.

Electrical parameters are comparable to the JEDEC registered 4N49 optocoupler, but with a higher CTR and better CTR degradation characteristics due to radiation exposure.

OLS0449 and OLS2449 devices are offered as unscreened versions as well as screened to customer requirements, including MIL-STD-883 Class B equivalent, MIL-PRF-19500 JAN, JANTX, JANTXV, JANS equivalent and MIL-PRF-38534 Class H, K equivalent.

Data Sheets

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Specifications

Memo

ConditionCTR @ IF = 1 mA, Vce = 5V

CTR Min. (%)1500

CTR Max. (%)4000

BV_CEO (V)65

Switching Time (μs)25

Isolation @ V_DC 1 Sec.1000

Package Photo

Package Info4-Lead Hermetic Ceramic LCC

Radiation Toleranttrue

Base Connectionfalse

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

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