OLH249

Radiation Tolerant Phototransistor Hermetic Optocoupler


The OLH249 is designed especially 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 consists of an LED and N-P-N silicon phototransistor electrically isolated, but optically coupled inside a hermetic TO-5 package. Electrical parameters are similar to the JEDEC registered 4N49 optocoupler, but have much better CTR degradation characteristics due to radiation exposure. The OLH249 has 100 percent high-reliability screened parts available. Contact us for more details.

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Specifications

Memo
ConditionCTR @ IF = 1 mA
CTR Min.200
CTR Max.1200
BVCEO (V)40
Vcc Max. (V)
Switching Time (μs)25
Isolation @ VDC 1 Sec.1000
Package Photo
Package Info6-Lead Hermetic TO-5
Radiation TolerantYes
No Base Connection

Features

  • Radiation-tolerant version of 4N49
  • Current Transfer Ratio (CTR) guaranteed over –55 °C to
  • +100 °C ambient temperature range
  • 1000 VDC electrical isolation
  • High CTR
  • Standard TO-5 hermetic package
  • High reliability screening available

Product Documents

Applications

Avionics

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Biomedical Materials

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Surveillance Systems

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Specialty Medical Applications

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Communications

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Instrumentation

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Radar

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Space

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