Si87xx Optocoupler Replacement Isolators

Si87xx devices isolate high-speed digital signals and offer performance, reliability, and flexibility advantages unavailable with competing optocoupler products. Si87xx products are based on our proprietary CMOS isolation technology for low-power and high-speed operation, providing longer service life and dramatically higher reliability compared to traditional optocouplers. Si87xx isolators are resistant to the wear-out effects found in optocouplers, which degrade performance with increasing temperature, forward current, and device age.  

Si87xx isolators are pin-compatible, single-channel, drop-in optocoupler replacements with data rates up to 15 Mbps. Ordering options include open collector or push-pull outputs with and without integrated pull-up resistor and output enable pin.

Optocoupler compatibility
Propagation delay
5x lower than optos

Common Specs

  • Pin-compatible, drop-in upgrades for popular high-speed digital optocouplers
  • Performance and reliability advantages vs. optocouplers
    • Resistant to temperature, age, and forward current effects
    • 10x lower FIT rate for longer service life
    • Higher common-mode transient immunity: >50 kV/μs typical
    • Lower power and forward input diode current
  • PCB footprint compatible with optocoupler packaging
  • Wide range of product options
  • Diode emulator input
  • 3 to 30 V open collector output
  • Propagation delay 30 ns typical
  • Data rates from dc to 15 Mbps
  • 3.75 and 5 kV reinforced isolation
  • UL, CSA, and VDE certifications
  • Wide operating temperature range –40 to +125 °C
  • RoHS-compliant packages


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Part Number Isolation Rating (kVrms) 10 kV Surge Enable Control Package Type Max Data Rate (Mbps) Default Output State Integrated Pull-Up AEC-Q100

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