Like MIL-STD-1553, RS-485 is based on the use of differential signaling. However, in many respects, RS-485 is a less robust standard than 1553. For example, RS-485’s minimum bus voltage is 1.5 volts peak (3.0 volts peak-to-peak), which is half of the MIL- STD-1553 minimum bus voltage of 6.0 volts peak-to-peak. In addition, unlike RS-485, MIL-STD-1553 calls for balanced signaling and transformer isolation.