The ISL33001 two-channel bus buffer provides the buffering necessary to extend the bus capacitance beyond the 400pF maximum specified by the I2C specification. In addition, the ISL33001 features rise time accelerator circuitry to reduce power consumption from passive bus pull-up resistors and improve data-rate performance. The device also includes hot-swap circuitry to prevent corruption of the data and clock lines when I2C devices are plugged into a live backplane. The ISL33001 operates at supply voltages from +2.3V to +5.5V at a temperature range of -40 °C to +85 °C.


  • two-channel I2C compatible bidirectional buffer
  • +2.3VDC to +5.5VDC supply range
  • 400kHz operation
  • Bus capacitance buffering
  • Rise time accelerators
  • Hot swapping capability
  • ±6kV Class 3 HBM ESD protection on all pins
  • ±12kV HBM ESD protection on SDA/SCL pins
  • Enable pin
  • READY logic pin
  • Pb-free (RoHS Compliant) 8 Ld SOIC, 8 Ld TDFN (3mm x 3mm) and 8 Ld MSOP packages
  • Low quiescent current: 2.1mA typ
  • Low shutdown current: 0.5µA typ



  • I2C bus extender and capacitance buffering
  • Server racks for telecom, datacom and computer servers
  • Desktop computers
  • Hot-swap board insertion and bus isolation


PDF 1.17 MB Datasheet
PDF 5.20 MB 日本語 Brochure
PDF 164 KB Product Advisory
PDF 202 KB Product Change Notice
PDF 326 KB Product Change Notice
PDF 266 KB Product Change Notice
PDF 363 KB Product Advisory
PDF 106 KB Product Change Notice
PDF 173 KB Product Change Notice
PDF 84 KB Product Change Notice
PDF 152 KB Product Change Notice
PDF 117 KB Product Change Notice
PDF 303 KB Application Note
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