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Broadcom ACPL-074N High-Speed Digital CMOS Optocouplers

Broadcom ACPL-074N High-Speed 15Mbaud Digital CMOS Optocouplers utilize LED packaging and CMOS Integrated Circuit (IC) technologies to achieve excellent optical galvanic isolation at a data rate of up to 15Mbaud. The basic building blocks of these optocouplers are the high-speed LED and a CMOS detector IC. The detector IC incorporates an integrated photodiode, a high-speed transimpedance amplifier, and a voltage comparator with an output driver. An internal Faraday shield provides a guaranteed common-mode transient immunity specification of 30kV/μs, minimum. The Broadcom ACPL-074N is UL recognized with an isolation voltage of 3750VRMS for one minute per UL1577. 

Features

  • Superior optical isolation and insulation
  • 3.3V and 5V CMOS compatibility
  • Low 1.5mA (maximum) power
  • Low 4mA minimum LED drive current
  • 15Mbaud minimum data rate
  • 30kV/μs minimum common-mode transient immunity
  • -40°C to +125°C operating temperature range
  • SO-8 package
  • Safety and regulatory approvals
    • 567VPK IEC/EN 60747-5-5 insulation working voltage
    • 3750VRMS UL 1577 isolation voltage for 1 minute
    • CAN/CSA-C22.2 No. 62368-1

Applications

  • RS-485, CANBus, and I2C communication interfaces
  • Microprocessor and microcontroller system interfaces
  • Digital isolation for analog-to-digital (A/D) and digital-to-analog (D/A) converters

Specifications

  • 0V to 6.5V supply voltage range
  • 20mA maximum average forward input current
  • 35mW maximum input power dissipation
  • 30mW maximum output power dissipation per channel
  • 3.0V to 5.5V operating supply voltage range
  • 4mA to 10mA operating forward input current range
  • 0.8V maximum operating forward off-state voltage
  • 60pF typical input capacitance
  • Switching
    • 55ns maximum propagation delay time to logic low/high output
    • 25ns maximum pulse width distortion, 6ns typical
    • 25ns maximum propagation delay skew
    • 6ns typical output rise time (10% to 90%)
    • 5ns typical output fall time (90% to 10%)
    • 30kV/μs minimum static common-mode transient immunity at logic high/low output
  • Insulation
    • 4.9mm minimum external air gap, external clearance
    • 4.8mm minimum external tracking, external creepage
    • 0.08mm minimum internal plastic gap, internal clearance
    • ≥175V tracking resistance [Comparative Tracking Index (CTI)]
  • Pollution degree 2
  • 567VPEAK maximum working insulation voltage
  • 907VPEAK to 1063VPEAK input-to-output test voltage range
  • 6000VPEAK highest allowable overvoltage
  • Safety-limiting values
    • +150°C case temperature
    • 150mA inut current
    • 600mW output power
  • ≥109Ω insulation resistance
  • +260°C maximum lead soldering temperature for 10s
  • Package
    • 3750VRMS minimum input-output momentary withstand voltage
    • 1014Ω typical input-output resistance
    • 0.6pF typical input-output capacitance

Functional Diagram

Schematic - Broadcom ACPL-074N High-Speed Digital CMOS Optocouplers

Dimensions

Mechanical Drawing - Broadcom ACPL-074N High-Speed Digital CMOS Optocouplers

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Broadcom ACPL-M75N High-Speed Digital CMOS Optocouplers

Offers excellent optical galvanic isolation at a data rate of up to 15Mbaud and a 30kV/µs CMR.

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Published: 2025-08-28 | Updated: 2025-09-03