FAQ: Logic and Voltage Translation > Ground-Level Translators >> Current FAQ
A negative signal can be generated from ground-level translators as long as the user’s system has a negative supply rail. To prevent damage to the IC, the difference between VCC and GND needs to fall within the recommended operating conditions.
Let's use the image below as an example. VCC and GND for both A-port and B-port fall within the recommended conditions. The output signal will toggle between VCCB and GNDB which in this case is 0V and -4V.
Using the same test conditions on the TXG8041, the output waveform (pink) toggles between GND and -4V.
