Expandable 5-Channel I²C-Bus Hub

Product Details

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Block Diagram

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PCA9518 Block Diagram

PCA9518 Block Diagram

Block diagram: PCA9518D, PCA9518PW


Key Features

  • Expandable 5 channel, bidirectional buffer
  • I²C-bus and SMBus compatible
  • Active HIGH individual repeater enable inputs
  • Open-drain input/outputs
  • Lock-up free operation
  • Supports arbitration and clock stretching across the repeater
  • Accommodates Standard-mode and Fast-mode I²C-bus devices and multiple controllers
  • Powered-off high-impedance I²C-bus pins
  • Operating supply voltage range of 3.0 V to 3.6 V
  • 5 V tolerant I²C-bus and enable pins
  • 0 Hz to 400 kHz clock frequency²
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Package offerings: SO20 and TSSOP20
  • The maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater


Quick reference to our documentation types.

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Design Resources

Design Files

2 design files

  • Models

    PCA9518 IBIS model

  • Symbols and Footprints

    PCA9518PW-TSSOP20-CAD Symbol and PCB Footprint – BXL File

Engineering Services

2 engineering services

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