Hermetic Surface Mount High-speed Optocoupler

The OLS300 is suitable for interfacing Transistor-Transistor Logic (TTL) to Low Power Schottky Transistor-Transistor Logic (LSTTL), or Complementary Metal Oxide Semiconductor (CMOS), as well as wide bandwidth analog applications. Each OLS300 has an LED and integrated photodiode transistor detector mounted and coupled in a custom hermetic surface mount leadless chip carrier (LCC) ceramic package that provides 1500 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 phototransistors by reducing the base-to-collector capacitance.

The OLS300’s device mounting is achieved with reflow soldering or conductive epoxies.

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ConditionCTR @ IF = 10 mA
CTR Min.20
CTR Max.
Vcc Max. (V)18
Propagation Delay2µs Max.
Isolation @ VDC 1 Sec.1500
Package Photo
Package Info6-Lead Hermetic Ceramic LCC
Radiation TolerantYes


  • Electrical parameters guaranteed over –55 °C to +125 °C ambient temperature range
  • 1500 VDC electrical isolation
  • High-speed, 1 Mbps typical
  • Open collector output
  • High reliability and rugged construction
  • Similar to 6N135/136, 4N55 type optocouplers
  • Radiation tolerant
  • High reliability screenings are available

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