To illustrate this effect in a real I²C transaction, Figure 3-4 shows a test setup of two devices communicating over the I²C bus with the TCA9517 included for level translation.

The controller side is connected to the A side of the TCA9517 and the target is connected to the B side of the TCA9517.

Figure 3-4 Example Setup

Figure 3-5 shows a screen capture of the SCL and SDA lines on both sides of the TCA9517. Looking at the region after the eighth clock pulse, a very short spike is visible on the SDA line of the controller.

Figure 3-5 SDA Handoff Delay With Nine Clock Pulses