1MBd Dual-channel, Bi-directional R2Coupler® Optocoupler

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The Broadcom ACFL-5211T is an automotive grade dual-channel optocopler device designed for bi-directional digital communications. The device has two optocoupler channels internally aligned 180 degrees of each other, providing optimum chip pin-out configuration for bi-directional Tx/Rx data communication design and board layout. The two channels are electrically indepedent and galvanically isolated, providing an ideal isolated bi-directional power system communication interface.
The device is optimized for low power systems supporting data rates up to 1 MBd and packaged in a compact SSO-12 package comparable to the SSO-8 footprint.
Broadcom R2CouplerTM isolation products provide the reinforced insulation and reliability needed for critical automotive and high temperature industrial applications.


  • Automotive Qualified per AEC-Q100 Grade 1 Guidelines
  • Operating Temperature from -40 °C to +125 °C
  • 8mm Creepage and Clearance
  • Data Rates up to 1MBd
  • LED Current Drive (IF): 0.8 to 16mA
  • Low Propagation Delay: 1µs max at IF = 10mA
  • Vcc Range: 3 to 20 V
  • Compact, Auto-Insertable Stretched SO12 Package
  • Worldwide Safety Approval:
- UL 1577 approval, Viso = 5,000 Vrms for 1 min.
- CSA Component Acceptance Notice 5
- IEC 60747-5-5, EN/DIN EN 60747-5-2, Viorm = 1,140 Vpeak


  • Automotive IPM Driver for DC-DC Converters and Motor Inverters
  • Status Feedback and Wake-Up Signal Isolation
  • CANBus and SPI Communications Interface
  • High Temperature Digital/Analog Signal Isolation

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
Distrib. Inventory Yes
Product Type Automotive Optocoupler
CMR (min.) (V/µs) 15000.0
Vcm (V) 1500.0
CTR Max. (%) 100
CTR Min. (%) 32.0
IF Min. (mA) 10.0
RoHS6 Compliant Pb & Pb-free options available
Package Stretched SO12
UL Insulation Rating Viso (VRMS) 5000.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 1140.0
Prop Delay (tPHL) Max. (µs) 1 µs
Prop Delay (tPLH) Max. (µs) 1 µs

Data Sheet1 i


Automotive 1MBd Transistor Output Optocoupler


Automotive R²Coupler™ 1MBd Transistor Output Optocoupler in Stretched SO-8 Package with 8mm Creepage & Clearance


Automotive R²Coupler™ 1MBd Transistor Output Optocoupler in Stretched SO-8 Package with 8mm Creepage & Clearance