OLC449

Radiation-Tolerant Phototransistor Non-Hermetic Surface-Mount Optocoupler

The OLC449 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 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 six-pin Leadless Chip Carrier (LCC) package.

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

The hermetic surface mount variant of the OLC449 optocoupler is available as the OLS449, both in a non-screened catalog version as well as a high-reliability screened version.

The OLC449 is designed for a low LED operating current while providing excellent radiation tolerance margins.

Data Sheets

Talk to Sales ECAD Model

Specifications

Product LifecycleIn Production

Memo

ConditionCTR @ IF = 1 mA

CTR Min.1500

CTR Max.4000

BV_CEO (V)65

Vcc Max. (V)—

Switching Time (μs)25

Isolation @ V_DC 1 Sec.1000

Package Photo

Package Info6-Lead Non Hermetic LCC

Radiation TolerantYes

No Base Connection

Features

Radiation tolerant version of the 4N49U
High current transfer ratio (CTR) is guaranteed:
- – Over –55 °C to +125 °C ambient temperature range
- – At LED current of 1mA
1000 VDC electrical isolation
Same processing and construction as the OLC249, but with a higher CTR

Product Documents

Applications

Avionics

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Surveillance Systems

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Communications

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Radar

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Space

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