Existing Solutions

NO2

COM2

NC2

NO1

NC1

COM1

Device 1

Device 2

13

TMUX1072

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SCDS382 – APRIL 2018

Product Folder Links: TMUX1072

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8.3 Feature Description

8.3.1 Powered-off Protection

When the TMUX1072 is powered off the I/Os of the device remain in a high-Z state. The crosstalk, off-isolation,

and leakage remain within the Electrical Specifications

This prevents errant voltages from reaching the rest of the system and maintains isolation when the system is

powering up.

8.3.2 Overvoltage Detection

an overvoltage event has been detected. The open drain output will release the FLT pin when the voltage on the

8.3.3 Overtemperature Detection

drain output FLT pin pulls the pin low to indicate an overtemperature event has been detected. The open drain

8.3.4 Overvoltage Protection

The OVP of the TMUX1072 is designed to protect the system from overvoltage conditions up to 20 V on the

COM1 and COM2 pins. Figure 12 depicts an event where up to 20 V could appear on COM1 and COM2 that

could pass through the device and damage components behind the device.

Figure 12. Existing Solution Being Damaged by a Short, 20 V

The TMUX1072 opens the switches and protect the rest of the system by blocking the 20 V as depicted in

Figure 13.