Philips Semiconductors
I2C-bus repeater
Product data sheet
PCA9515A
On the Bus 1 side of the PCA9515A, the clock and data lines would
have a positive offset from ground equal to the VOL of the
PCA9515A. After the 8th clock pulse, the data line will be pulled to
the VOL of the slave device that is very close to ground in our
example.
9th CLOCK PULSE
It is important to note that any arbitration or clock stretching events
on Bus 1 require that the VOL of the devices on Bus 1 be 70 mV
below the VOL of the PCA9515A (see VOL – Vilc in the DC
Characteristics section) to be recognized by the PCA9515A and
then transmitted to Bus 0.
2 V/DIV
VOL OF SLAVE
Figure 5. Bus 1 waveform
VOL OF PCA9515A
SW02246
2004 Sep 29
5