Hermetically Sealed, Dual Channel Line Receiver Optocouplers

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The HCPL-1931 is a high reliability Class H two channel hermetically sealed high CMR line receiver optocoupler in a 16-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 Level K testing or from the DLA Standard Microcircuit Drawing (SMD) 5962-89572. The devices are manufactured and tested on a MIL-PRF-38534 certified line and are included in the DLA Qualified Manufacturers List QML-38534 for Hybrid Microcircuits.

Each unit contains two independent channels, consisting of a GaAsP light emitting diode, an input current regulator, and an integrated high gain photon detector. The input regulator serves as a line termination for line receiver applications. It clamps the line voltage and regulates the LED current so line reflections do not interfere with circuit performance. The regulator allows a typical LED current of 12.5 mA before it starts to shunt excess current. The output of the detector IC is an open collector Schottky clamped transistor. An enable input gates the detector. The internal detector shield provides a guaranteed common mode transient immunity specification of 1000 V/micro-second. DC specifications are compatible with TTL logic and are guaranteed from -55 degrees C to 125 degrees C allowing trouble-free interfacing with digital logic circuits. An input current of 10 mA will sink a six gate fan-out (TTL) at the output with a typical propagation delay from input to output of only 45 nsec.


  • High Reliability, Two Channel, 16-Pin DIP
  • Performance Guaranteed from -55 degC to 125 degC
  • MIL-PRF-38534 Class H, QML-38534
  • Dual Marked with Device Part Number and DLA Standard Microcircuit Drawing
  • High Radiation Immunity
  • MIL-PRF-38534 Class K Available
  • Accepts a Broad Range of Drive Conditions
  • High Speed: 10 M bit/s
  • Adaptive Line Termination Included
  • Internal Shield Provides Excellent Common Mode Rejection
  • External Base Lead Allows "LED Peaking" and LED Current Adjustment
  • 1500 Vdc Withstand Test Voltage


  • Military and Aerospace
  • High Reliability Systems
  • Transportation, Medical, and Life Critical Systems
  • Isolated Line Receiver
  • Simplex/Multiplex Data Transmission
  • Microprocessor System Interface
  • Ground Loop Elimination
  • Computer-Peripheral Interfaces
  • Pulse Transformer Replacement
  • Current Sensing
  • Instrument Input/Output Isolation
  • Digital Isolation for A/D, D/A Conversion
  • Harsh Industrial Environments

Lifecycle Status


Specification Value
Lifecycle Active
Distrib. Inventory Yes
IF Min. (mA) 12.5
Input Current Ma Uom mA
CMR (min.) (V/µs) 10000.0
Package Hermetic 16 Pin DIP
Product Type Hermetic High Speed Logic Gate
Reliability Class MIL-PRF-38534 Class H
VDD2 (V) 4.5
Data Rate 10 Mb/s
Prop Delay (tPHL) Max. (µs) 100 ns
Prop Delay (tPLH) Max. (µs) 100 ns
Application Note3 i
Data Sheet1 i
Design Guide1 i
Product Change Notice (PCN)5 i
Regulatory Certificate2 i
Specification1 i
White Papers1 i
Selection Guide1 i