Low Power 5MBd Digital Optocoupler

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The Broadcom ACPL-W21L is a single-channel stretched SO-6 package version of the compact ACPL-x2xL 5MBd digital optocoupler product family. The device features high-performance LED and detector IC design. The detector has a CMOS output stage and an optical receiver input stage with built-in Schmitt triggers to provide logic-compatible waveforms, eliminating the need for additional waveshaping. The ACPL-W21L is extremely low power performing at maximum 1.1mA IDD current per channel across industrial temperature range. With a forward LED current as low as 1.6 mA, most microprocessors (MCUs) can directly drive the LED.

An internal shield on the ACPL-W21L guarantees common mode transient immunity of 25 kV/µs at a common mode voltage of 1000 V over a temperature range of -40°C to +105°C. The device has glitch-free output upon system power-up and power-down.


  • 5MBd Typical Signal Rate
  • CMOS Output
  • Low Supply Current, IDD < 1.1 mA (max)
  • Low LED Input Drive Current, IF at 1.6 mA (min)
  • Low Supply Voltage Range, 2.7 - 5.5 V
  • Hysteresis: 0.2 mA (typical)
  • High CMR (min. 25kV/us@VCM=1kV)
  • SSO6 Package, Single Channel
  • 250ns Maximum Propagation Delay Guaranteed over Full Temperature Range
  • Guaranteed Industrial Temperature Performance from -40 oC to +105oC
  • Safety Approvals: 
    • IEC/EN 60747-5-5, IEC/EN/DIN EN 60747-5-2 Approval for Reinforced Insulation
    • UL 1577 Recognized - 5000 V rms for 1 Minute
    • CSA Approved
  • Available Options:
    • 060/560 = IEC/EN 60747-5-5 , IEC/EN/DIN EN 60747-5-2 VIORM = 1140  VPEAK
    • 500 = Tape and Reel Packaging Option
    • XXXE = Lead Free Option


  • Industrial Networking & Digital I/Os
  • Isolation of High Speed Logic Systems
  • Microprocessor System Interfaces
  • Ground Loop Elimination
  • Pulse Transformer Replacement
  • High Speed Line Receiver
  • Computer-Peripheral Interfaces
  • Power Control Systems

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory Yes
Vcm (V) 1000.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 1140.0
IF Min. (mA) 1.6
Input Current Ma Uom mA
RoHS6 Compliant Y
Package Stretched SO6
Product Type 5 MBd Logic Gate
UL Insulation Rating Viso (VRMS) 5000.0
VDD2 (V) 2.7-5.5
Prop Delay (tPHL) Max. (µs) 0.25
Prop Delay (tPLH) Max. (µs) 0.25
IF Min. (mA) 1.6 mA
Application Note3 i
Data Sheet1 i
Options Data Sheet1 i
Product Change Notice (PCN)1 i
Regulatory Certificate1 i
Reliability Data Sheet2 i
Selection Guide1 i
White Papers3 i
FAQs1 i
Promotional Material1 i