Two-Channel I²C-Bus Controller Arbiter

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Product Details

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Key Features

  • 2-to-1 bidirectional controller selector
  • Channel selection via I2C-bus
  • I2C-bus interface logic; compatible with SMBus standards
  • 2 active LOW interrupt outputs to controller controllers
  • Active LOW reset input
  • Software reset
  • Four address pins allowing up to 112 different addresses
  • Arbitration active when two controllers try to take the downstream I2C-bus at the same time
  • The winning controller controls the downstream bus until it is done, as long as it is within the reserve time
  • Bus time-out after 100 ms on an inactive downstream I2C-bus (optional)
  • Readable device ID (manufacturer, device type, and revision)
  • Bus initialization/recovery function
  • Low Ron switches
  • Allows voltage level translation between 1.8 V, 2.3 V, 2.5 V, 3.3 V and 3.6 V buses
  • No glitch on power-up
  • Supports hot insertion
  • Software identical for both controllers
  • Operating power supply voltage range of 2.3 V to 3.6 V
  • All I/O pins are 3.6 V tolerant
  • Up to 1 MHz clock frequency
  • ESD protection exceeds 6000 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

  • TSSOP16, HVQFN16

Product Longevity Program

  • This product is included in NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The PCA9641PW is included in the 15-year program


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Design Resources

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Design Files

3 design files

  • Symbols and Footprints

    PCA9641PW-TSSOP16-CAD Symbol and PCB Footprint – BXL File

  • Symbols and Footprints

    PCA9641BS-HVQFN16-CAD Symbol and PCB Footprint – BXL File

  • Design Files - miscellaneous

    Expert mode sample code PCA9641


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