3.3V/5V Digital Optocoupler Family

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The HCPL-273L high-gain series optocouplers use a Light Emitting Diode and an integrated high gain photodetector to provide extremely high current transfer ratio between input and output.

Separate pins for the photodiode and output stage result in LVTTL compatible saturation voltages and high speed operation. Where desired, the VCC and VO terminals may be tied together to achieve photodarlington operation. A base access terminal allows a gain bandwidth adjustment to be made.

These optocouplers are for use in LVTTL/LVCMOS or other low power applications. A 400 percent minimum current transfer ratio is guaranteed over 0 to 70 degrees C operating range for only 0.5 mA of LED current.

The SOIC-8 does not require "through holes" in a PCB. This package occupies approximately one-third the footprint area of the standard dual-in-line package. The lead profile is designed to be compatible with standard surface mount processes.


  • 3.3V/5V Dual Supply Voltages
  • Low power consumption
  • High current transfer ratio
  • Low input current requirements - 0.5 mA
  • LVTTL/LVCMOS compatible output
  • Performance guaranteed over temperature 0 degrees C to 70 degrees C
  • Base access allows gain bandwidth adjustment
  • High output current - 60 mA
  • Safety approval, UL, IEC/EN/DIN EN 60747-5-2, CSA
  • Options available are:
060 = IEC/EN/DIN EN 60747-5-2 Option
500 = Tape and Reel Package Option
XXXE = Lead Free Option


  • Ground isolate most logic families - LVTTL/LVCMOS
  • Low input current line receiver
  • High voltage insulation
  • EIA RS-232C line receiver
  • Telephone ring detector
  • 117 V AC line voltage status indicator - low input power dissipation
  • Low power systems - ground isolation

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
Distrib. Inventory Yes
RoHS6 Compliant Pb & Pb-free options available
Product Type 3.3V Digital Optocoupler
Package 300mil DIP-8
VDD (V) 3.3/5
IF Min. (mA) 0.5
CTR Min. (%) 400.0
CTR Max. (%) 5000
Prop Delay (tPLH) Max. (µs) 90.0
Prop Delay (tPHL) Max. (µs) 30.0
CMR (min.) (V/µs) 1000.0
Vcm (V) 10.0
UL Insulation Rating Viso (VRMS) 5000.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 630
Application Brief1 i
Application Note6 i
Brochures2 i
Data Sheet2 i
Design Guide1 i
FAQs2 i
Obsolescence Notice1 i
Options Data Sheet6 i
Photocard1 i
Product Change Notice (PCN)19 i
Regulatory Certificate2 i
Reliability Data Sheet1 i
Selection Guide2 i
White Papers4 i
Promotional Material1 i