Negative beyond the supply is defined as the capability of a device to pass a voltage signal below ground and less than the power supply. One common application for this feature originates from the audio industry. In audio systems, the power supply is usually in the range of 1.8V to 5V. In these types of applications, at times there is a requirement to pass a signal below ground, or for example a negative signal. That is where the Negative Beyond the Supply comes in, where it allows the device to pass a negative signal while being powered by a single positive supply. This capability is shown in Table 2-1 where the TS5A22364 signal path voltage can be negative, while the supply is positive.

Figure 2-1 is an example of a use case, showing the TS5A22364 switching between two input signals of -1.8V to output speakers, while being powered by a positive supply of 3.3V.