Hermetically sealed Optocoupler, AC/DC to Logic Interface

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The DLA SMD 5962-8947702Kxx is a highest reliability level (Class K) single channel hermetically sealed voltage/current threshold detection optocoupler in an 8-Pin ceramic DIP package. Gold plated leads, solder dipped leads and various lead form options are also available. See the datasheet for details.

The product is capable of operation and storage over the full military temperature range and may also be purchased as either commercial grade or with full MIL-PRF-38534 Class H Level testing from the same DLA Standard Microcircuit Drawing (SMD).

The 5962-8947702Kxx is manufactured and tested on a MIL-PRF-38534 certified line and included in the DLA Qualified Manufacturers List, QML-38534 for Hybrid Microcircuits. Each device contains a light emitting diode, a threshold sensing input buffer IC, and a high gain photon detector to provide an optocoupler which permits adjustable external threshold levels. The input buffer circuit has a nominal turn on threshold of 2.5 mA (ITH ) and 3.6 volts (VTH ). The addition of one or more external attenuation resistors permits the use of this device over a wide range of input voltages and currents. Threshold sensing prior to the LED and detector elements minimizes effects of any variation in optical coupling. Hysteresis is also provided in the buffer for extra noise immunity and switching stability.

The buffer circuit is designed with internal clamping diodes to protect the circuitry and LED from a wide range of over-current transients while the diode bridge enables easy use with ac voltage input.

These units combine several unique functions in a single package, providing the user with an ideal component for computer input boards and other applications where a predetermined input threshold optocoupler level is desirable.

The high gain output stage features an open collector output providing both TTL compatible saturation voltages and CMOS compatible breakdown voltages.


  • Highest reliability, single channel, 8-Pin DIP
  • Performance guaranteed from -55 degC to 125 degC
  • MIL-PRF-38534 Class K, QML-38534
  • Dual marked with device part number and DLA Standard Microcircuit Drawing (SMD)
  • AC or DC input
  • Programmable sense voltage
  • Hysteresis
  • Logic compatible output
  • Thresholds guaranteed over temperature
  • Thresholds independent of LED characteristics
  • 1500 Vdc withstand test voltage


  • Military and aerospace
  • High reliability systems
  • Transportation, medical, and life-critical systems
  • Telephone ring detection
  • Microprocessor interface
  • Limit switch sensing
  • Low voltage detector
  • AC/DC voltage sensing
  • Relay contact monitor
  • Relay coil voltage monitor
  • Current sensing
  • Harsh industrial environments

Lifecycle Status


Specification Value
Lifecycle Active
Distrib. Inventory No
Package Hermetic 8 Pin DIP
Product Type Hermetic AC-DC to Logic Interface
Reliability Class MIL-PRF-38534 Class K
VDD2 (V) 3.0
Hysteresis (mA) 1.2 mA
Prop Delay (tPHL) Max. (µs) 20 µs
Prop Delay (tPLH) Max. (µs) 40 µs
Bandwidth 10 KHz
Application Note3 i
Data Sheet1 i
Product Change Notice (PCN)5 i
Regulatory Certificate2 i
Specification1 i
White Papers1 i
Selection Guide1 i