Extended Temperature High-speed Hermetic Surface-Mount Optocoupler

The OLF300ET is suitable for interfacing Transistor-Transistor Logic (TTL) to Low Power Schottky Transistor-Transistor Logic (LSTTL), TTL, or Complementary Metal Oxide Semiconductor (CMOS), as well as wide bandwidth analog applications. Each OLF300ET has an LED and an integrated photodiode transistor detector mounted and coupled in a custom 8-pin hermetic flatpack package, providing 1000 VDC of electrical isolation between the input and output. The integrated photodiode transistor improves the switching speed by orders of magnitude as compared to standard photo transistors by reducing the base-to-collector capacitance. The internal shield provides excellent common-mode immunity performance.


  • Hermetic SMT package
  • Thermal shock rated to –130 °C
  • Electrical parameters guaranteed over –55 °C to +125 °C ambient temperature range
  • 1000 VDC electrical isolation
  • High-speed, 1 Mbps typical
  • Open collector output
  • 300 kHz bandwidth
  • Similar to 6N135/136, 4N55
  • Radiation tolerant
  • Offers 100% high reliability screenings
Data Sheets OLF300ET Data Sheet OLF300ET_203295B.pdf (341 KB)
Application Notes Skyworks Optocouplers vs. Pulse Transformers Optocouplers_vs_Pulse_Transformers_204659A_AN.pdf (108 KB)
White Paper Optocouplers for the Hybrid industry WP_Optocouplers_for_the_Hybrid_industry.pdf (322 KB)
White Paper Discussion of RGA Test for Moisture Content for Isolink Optocouplers WP_RGA_2017_Feb.pdf (123 KB)
ProductName : OLF300ET
Memo :
Condition : CTR @ IF = 16 mA
CTR Min. : 5
CTR Max. :
Vcc Max. (V) : 18
Propagation Delay : 6µs Max.
Isolation @ VDC 1 Sec. : 1000
Package Photo :
Package Info : 8-Lead Hermetic Ceramic Flat
Radiation Tolerant :
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