High Speed CMOS R²Coupler

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The Broadcom ACPL-M71U and ACPL-M72U are high temperature, digital CMOS optocouplers in SO-5 packages. Suitable for high temperature industrial digital isolation applications, the optocouplers use the latest CMOS IC technology to achieve outstanding performance and low power consumption. All devices operate over the –40°C to 125 °C temperature range.

The ACPL-M71U uses a high speed LED, and the ACPL-M72U uses a low current LED for lower power dissipation. The high speed ACPL-M71U featuring a 35 ns maximum propagation delay (IF =10 mA). The ACPL-M72U optocoupler features low power. At low 4 mA LED drive current, ACPL-M72U typical propagation delay is 55 ns.

Each digital optocoupler has a CMOS detector IC, an integrated photodiode, a high speed transimpedance amplifier, and a voltage comparator with an output driver.

All Broadcom R2Coupler optocouplers feature reinforced insulation and reliability that delivers safe signal isolation in high temperature industrial applications.


  • 5 V CMOS compatible
  • Low power consumption IDD 1.5 mA max
  • Common-Mode Rejection 25kV/µs@ VCM=1000V
  • Wide industrial temperature range: –40°C to 125°C
  • Low propagation delay :
    High Speed ACPL-M71U: 26ns @ IF=10mA (Typical)
  • Regulatory and safety approval:
    UL 1577 recognized, 3750 Vrms / 1 min
    CSA approved
  • Options available are:
    500 = Tape and Reel Packaging Option
    XXXE = Lead-Free Option


  • Industrial CANBus Communications Interface
  • Industrial isolated high speed gate drivers for IGBTs and Power MOSFETs
  • High Temperature Digital Signal Isolation
  • Micro-controller Interface
  • Digital isolation for A/D and D/A conversion

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory Yes
RoHS6 Compliant Y
Product Type High Speed CMOS Logic Gate
Package SO5
VDD (V) 5
IF Min. (mA) 4.0
Prop Delay (tPLH) Max. (µs) 35.0
Prop Delay (tPHL) Max. (µs) 35.0
CMR (min.) (V/µs) 15000.0
Vcm (V) 1000.0
UL Insulation Rating Viso (VRMS) 3750.0
Application Note2 i
Product Change Notice (PCN)3 i
Reliability Data Sheet1 i
Technical Notes1 i
FAQs1 i
Promotional Material1 i


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