HCMOS Compatible, High CMR, 10 MBd Optocouplers

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The HCPL-261A family of optically coupled logic gates provide all the benefits of the industry standard 6N137 family with the added benefit of HCMOS compatible input current. This allows direct interface to all common circuit topologies without additional LED buffer or drive components. The AlGaAs LED used allows lower drive currents and reduces degradation by using the latest LED technology.

On the single channel parts, an enable output allows the detector to be strobed. The output of the detector IC is an open collector schottky-clamped transistor. The internal shield provides a minimum common mode transient immunity of 1000 V/ms for the HCPL-261A family and 15000 V/ms for the HCPL-261N family.


  • HCMOS/LSTTL/TTL Performance Compatible
  • 1000 V/us Minimum Common Mode Rejection (CMR) at VCM 50 V
  • High Speed: 10 MBd Typical
  • AC and DC Performance Specified over Industrial Temperature Range - 40 degrees C to 85 degrees C
  • Available in 8 Pin DIP, SOIC-8 Packages
  • Safety Approval:
UL Recognized per UL1577 3750 V rms for 1 minute and 5000 V rms for 1 minute (option 020)
CSA Approved
IEC/EN/DIN EN 60747-5-2 Approved with VIORM = 630 V peak (Option 060)
  • Options available are:
020 = 5000 V rms/ 1 minute UL Rating Option
060 = IEC/EN/DIN EN 60747-5-2 Viorm = 630 Vpeak Option
300 = Gull Wing Surface Mount Option
500 = Tape and Reel Packaging Option
XXXE = Lead Free Option


  • Low Input Current (3.0 mA) HCMOS Compatible Version of 6N137 Optocoupler
  • Isolated Line Receiver
  • Simplex/Multiplex Data Transmission
  • Computer-Peripheral Interface
  • Digital Isolation for A/D, D/A Conversion
  • Switching Power Supplies
  • Instrumentation Input/Output Isolation
  • Ground Loop Elimination
  • Pulse Transformer Replacement

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 10 MBd Logic Gate
Package 300mil DIP-8
VDD (V) 5
IF Min. (mA) 3.0
Prop Delay (tPLH) Max. (µs) 100.0
Prop Delay (tPHL) Max. (µs) 100.0
CMR (min.) (V/µs) 1000.0
Vcm (V) 50.0
UL Insulation Rating Viso (VRMS) 5000.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 630
Application Brief1 i
Application Note8 i
Brochures2 i
Design Guide1 i
FAQs2 i
Obsolescence Notice1 i
Options Data Sheet6 i
Product Change Notice (PCN)18 i
Promotional Material2 i
Regulatory Certificate1 i
Reliability Data Sheet2 i
Selection Guide2 i
Technical Notes1 i
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