PCA9515A

   The PCA9515A is a CMOS integrated circuit intended for application and SMBus systems. in I²C While retaining all the operating modes and features of the I²C system it permits extension of the I²C-bus by buffering both the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. The I² C-bus capacitance limit of 400 pF restricts the number of devices and bus length.

   Using the PCA9515A enables the system designer to isolate two halves of a bus, thus more devices or longer length of PCA9515A can be accommodated. It can also be used to run two buses, one at 5 V and the other at 3.3 V or a 400 kHz and 100 kHz bus, where the 100 kHz bus is isolated when 400 kHz operation .