Remote 8-Bit I/O Expander for Fm+ I²C-Bus with Interrupt and Reset

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Block diagram: PCA9672BS, PCA9672D, PCA9672PW


  • I²C-bus to parallel port expander
  • 1 MHz I²C‑bus interface (Fast-mode Plus I²C-bus)
  • Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to VDD with 100 μA current source
  • 8-bit remote I/O pins that default to inputs at power-up
  • Latched outputs with 25 mA sink capability directly drive LEDs
  • Total package sink capability of 200 mA
  • Active LOW reset input
  • Active LOW open-drain interrupt output
  • Sixteen programmable target addresses using two address pins
  • Readable device ID (manufacturer, device type, and revision)
  • -40 °C to +85 °C operation
  • ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22‑C101
  • Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
  • Packages offered: SO16, TSSOP16, HVQFN16

Target Applications

  • LED signs and displays
  • Servers
  • Keypads
  • Industrial control
  • Medical equipment
  • PLCs
  • Cellular telephones
  • Mobile devices
  • Gaming machines
  • Instrumentation and test measurement


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