9.2.1 Design Requirements

A typical operation for the TVS2701 would be in a multi-channel PLC protecting an analog input, shown in Figure 8. In this example, a TVS2701 is protecting the input to a MUX36D04, a four channel input multiplexer with a supply maximum at 36 V. In addition, the application must be able to withstand reverse wiring conditions with no damage caused to the input circuitry. Without any input protection, this input voltage will rise to hundreds of volts for multiple microseconds and violate the absolute maximum input voltage and harm the device if a surge event is caused by lightning, coupling, ringing, or any other fault condition. TI'd Flat-Clamp technology provides surge protection diodes that can maximize the useable voltage range and clamp at a safe level for the system.