3.3V/5V High Speed Digital CMOS Optocoupler

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The dual-channel ACPL-K73L  is a 15 MBd CMOS optocoupler in a stretched SO8 package. The  optocouplers utilize the latest CMOS IC technology to achieve outstanding performance with very low power consumption.

The basic building blocks of the ACPL-K73L are high speed LEDs and CMOS detector ICs. Each detector incorporates an integrated photodiode, a high speed transimpedance amplifier, and a voltage comparator with an output driver.

ACPL-W70L-000E and ACPL-K73L-000E in ST Microelectronics' 16-bit PLC Digital Input Reference Design.



  • 3.3V and 5 V CMOS compatibility
  • High speed: 15 MBd min
  • 25ns max. pulse width distortion
  • 55ns max. propagation delay
  • 40ns max. propagation delay skew
  • 10 kV/µs minimum common mode rejection
  • –40 to 105°C temperature range
  • Glitch-Free Power-UP Feature
  • Non-inverting Output
  • Safety and regulatory approvals
    UL recognized: 5000 V rms for 1 min. per UL 1577 for ACPoption 020.
    CSA component acceptance Notice#5.
    IEC/EN/DIN EN 60747-5-2 approved for ACPL-K73L Option 060.
  • Options available are:
    060 = IEC/EN/DIN EN 60747-5-2 Option
    500 = Tape and Reel Packaging Option
    XXXE = Lead Free Option


  • Digital field bus isolation:
     -  RS485, RS232, CANbus, CClink
  • Multiplexed data transmission
  • Computer peripheral interface
  • Microprocessor system interface
  • DC/DC converter
  • Servo Motor

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 High Speed CMOS Logic Gate
Package Stretched SO8
VDD (V) 3.3/5
IF Min. (mA) 4.0
CTR Max. (%) N.A.
Prop Delay (tPLH) Max. (µs) 55.0
Prop Delay (tPHL) Max. (µs) 55.0
CMR (min.) (V/µs) 10000.0
Vcm (V) 1000.0
UL Insulation Rating Viso (VRMS) 5000.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 1140
Application Brief1 i
Application Note5 i
Brochures2 i
Data Sheet1 i
FAQs2 i
Options Data Sheet4 i
Product Change Notice (PCN)5 i
Regulatory Certificate2 i
Reliability Data Sheet3 i
Selection Guide2 i
Technical Notes1 i
White Papers4 i
Promotional Material1 i


3.3V/5V High Speed Digital CMOS Optocoupler


3.3V/5V High Speed Digital CMOS Optocoupler


3.3V/5V High Speed Digital CMOS Optocoupler


3.3V/5V High Speed Digital CMOS Optocoupler