PI6ULS5V9511A Hot-Swappable I2C Bus/SMBus Buffer

By Diodes Incorporated

Diodes Incorporated's PI6ULS5V9511A is a hot-swappable I2C bus and SMBus buffer that allows I/O card insertion into a live backplane without corrupting the data and clock buses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, the PI6ULS5V9511A provides bidirectional buffering, keeping the backplane and card capacitances isolated. The PI6ULS5V9511A rise time accelerator circuitry allows the use of weaker DC pull-up currents while still meeting rise time requirements. The PI6ULS5V9511A incorporates a digital ENABLE input pin, which enables the device when asserted HIGH and forces the device into a low current mode when asserted LOW, and an open-drain READY output pin, which indicates that the backplane and card sides are connected (HIGH) or not (LOW).

  • Wide supply voltage range: 2.7 V to 5.5 V
    • Allow 2.7 V to 5.5 V I2C bus bidirectional level translation
  • ESD protection exceeds 4,000 V HBM
    • Better ESD performance in the market
  • Available in SOIC-8 (W), MSOP-8 (U), and UDFN2020-8 (ZW) package
    • Small form factor (UDFN-8) minimize design space and save cost
  • Bidirectional buffer for SDA and SCL lines increases fan out
    • I2C/SMBus bus expansion beyond the 400 pF limitation
  • Compatible with I2C standard mode, I2C fast mode and SMBus standards (up to 400 kbit/s operation)
  • Low shutdown mode supply current <0.1 μA
    • Low power consumption in shutdown mode
  • cPCI
  • VME
  • AdvanceTCA® cards
  • Multipoint backplane cards
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