The ISL33002 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 ISL33002 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, and the ISL33002 adds level translation for mixed supply voltage applications. The ISL33002 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
  • Logic level translation
  • Accelerator disable pin
  • Pb-free (RoHS compliant) 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

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TDFN Tube 100
Active TDFN Reel 6000
Active TDFN Tube 100
Active TDFN Reel 6000
Active MSOP Tube 50
Active MSOP Reel 2500


Boards & Kits

Part Number Title Type Company
ISL33002MSOPEVAL1Z I2C Bus Buffer with Rise Time Accelerators and Hot Swap Capability Evaluation Board Evaluation Renesas