High Speed CMOS R²Coupler with AEC-Q100 Grade 1 Qualification

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The ACPL-K71T and ACPL-K72T are high speed digital CMOS optocouplers  in packages suitable for emerging electric vehicle applications. The ACPL-K74T and ACPL-K75T are dual channel equivalent of the ACPL-K71T and ACPL-K72T respectively. All products are available in the stretched SO-8 package outline, designed to be compatible with surface mount processes.

ACPL-K71T and ACPL-K74T feature high speed mode with fastest propagation delay (max. 35ns at IF = 10mA) while ACPL-K72T and ACPL-K75T are low power mode with lowest LED drive current of 4mA for standard digital isolation switching.

Each channel of the digital optocoupler has a CMOS detector IC with an integrated photodiode, a high speed trans-impedance amplifier, and a voltage comparator with an output driver.

Broadcom R2Coupler provides with reinforced insulation and reliability that delivers safe signal isolation critical in automotive and high temperature industrial applications.


  • Qualified to AEC-Q100 Grade 1 test guidelines
  • Wide automotive temperature range: –40oC to 125oC
  • 5 V CMOS compatible
  • 40kV/µs Common-Mode Rejection at VCM=1000V 
  • Low propagation delay :
    • ACPL-K71T, ACPL-K74T: 25ns @ IF=10mA (Typical)
    • ACPL-K72T, ACPL-K75T: 60ns @ IF=4mA (Typical) 
  • Worldwide safety approval:
    - UL 1577 recognized, 5000 VRMS / 1 min
    - CSA approved
    - IEC/EN/DIN EN 60747-5-5 


  • Automotive CANBus and SPI Communications Interface
  • Automotive Power Transitor Isolation 
  • High Temperature Digital Signal Isolation
  • Automotive IPM Driver for DC/DC Converters and Motor Inverters
  • Digital isolation for A/D and D/A conversion

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
Distrib. Inventory Yes
IF Min. (mA) 3.5
RoHS6 Compliant Pb & Pb-free options available
Product Type High Speed CMOS Logic Gate
Package Stretched SO8
Operating Temperature Range -40°C to 125°C
AECQ100 Grade 1 Yes
CTR Max. (%) N.A.
CTR Min. (%) N.A.
PWD (max.) 50
Tpsk Max In Ns 60
CMR (min.) (V/µs) 25000.0
Vcm (V) 1000.0
UL Insulation Rating Viso (VRMS) 5000.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 1140.0
Prop Delay (tPHL) Max. (µs) 100
Prop Delay (tPLH) Max. (µs) 100
Data Sheet1 i
Options Data Sheet3 i
Reliability Data Sheet5 i
White Papers1 i
Photocard1 i


Low Power R2Coupler with AEC-Q100 Grade 1 Qualification


High Speed CMOS R2Coupler with AEC-Q100 Grade 1 Qualification


High Speed CMOS R²Coupler with AEC-Q100 Grade 1 Qualification


High Speed CMOS R²Coupler with AEC-Q100 Grade 1 Qualification


High Speed CMOS R²Coupler with AEC-Q100 Grade 1 Qualification