The PI6ULS5V9517B is a CMOS integrated circuit intended for I2C-bus or SMBus applications. It can provide level shifting between low voltage (down to 0.8 V) and higher voltage (2.2 V to 5.5 V) in mixed-mode applications. And it enables I2C and similar bus system to be extended, without degradation of performance even during level shifting. The PI6ULS5V9517B enables the system designer to isolate two halves of a bus for both voltage and capacitance, accommodating more I2C devices or longer trace length. It a