Broadcom ACPL-M49T Automotive Optocoupler

Broadcom ACPL-M49T is a single-channel 20kBd automotive optocoupler in a SOIC-5 package featuring low LED drive current. Broadcom ACPL-M49T automotive optocouplers can be configured for isolating digital status or analog feedback. Each detector incorporates an integrated photodiode with a single transistor. This Broadcom R²Coupler device provides reinforced insulation and reliability that delivers safe signal isolation critical in automotive and high temperature industrial applications.


  • High temperature and reliable low speed digital interface for automotive application
  • 30kV/µs High common-mode rejection at VCM = 1500V (typ)
  • Low power, low leakage phototransistor in a 4-pin configuration
  • Compact, auto-insertable SO5 packages
  • -40°C ~ 125°C Wide temperature range
  • 4mA (typ) Low LED drive current
  • 20µs (max) Propagation delay
  • Worldwide Safety Approval:
    • UL 1577, 4000 Vrms /1 min.
    • CSA File CA88324, Notice #5
    • IEC/EN/DIN EN 60747-5-2
  • Qualified to automotive AEC-Q100 grade 1 stress test guidelines


  • Automotive low speed digital signal isolation interface
  • Inverter fault feedback signal isolation
  • Switching power supplies feedback circuit

Functional Diagrams

Block Diagram - Broadcom ACPL-M49T Automotive Optocoupler
Publicado: 2010-07-28 | Actualizado: 2022-03-11