View ltc1694i datasheet:

Final Electrical Specifications LTC1694 SMBus Accelerator September 1998 FEATURES DESCRIPTION Improves SMBus Rise Time Transition The LT C®1694 is a dual SMBus active pull-up designed to Ensures Data Integrity with Multiple Devices enhance data transmission speed and reliability under all on the SMBus specified SMBus loading conditions. The LTC1694 is also Improves Low State Noise Margin compatible with the Philips I2CTM Bus. Auto Detect Low Power Standby Mode The LTC1694 allows multiple device connections or a Wide Supply Voltage Range: 2.7V to 6V longer, more capacitive interconnect, without compro- Tiny 5-Pin SOT-23 Package mising slew rates or bus performance, by using two U bilevel hysteretic current source pull-ups. APPLICATIONS During positive bus transitions,