TMUX7308FRRPR datasheet(27/54 Pages) TI2

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8.3 On-Leakage Current

Source on-leakage current (IS(ON)) and drain on-leakage current (ID(ON)) denote the channel leakage currents

when the switch is in the on state. IS(ON) is measured with the drain floating, while ID(ON) is measured with the

source floating. Figure 8-3 shows the circuit used for measuring the on-leakage currents.

GND

IS(ON)

GND

N.C.

GND

ID(ON)

GND

N.C.

VDD

VSS

VDD

VSS

Figure 8-3. On-Leakage Measurement Setup

8.4 Input and Output Leakage Current Under Overvoltage Fault

If the voltage on any source pin goes above the supplies (VDD or VSS) by one threshold voltage (VT), the

overvoltage protection feature of the TMUX7308F and TMUX7309F is triggered to turn off the switch under

fault, keeping the fault channel in a high-impedance state. IS(FA) and ID(FA) denotes the input and output

leakage current under overvoltage fault conditions, respectively. For ID(FA) the device is disabled to measure

leakage current on the drain pin without being impacted by the 40 kΩ impedance to the fault supply. When

the overvoltage fault occurs, the supply (or supplies) can either be in normal operating condition (Figure 8-4)

or abnormal operating condition (Figure 8-5). During abnormal operating condition, the supply (or supplies) can

either be unpowered (VDD= VSS = 0 V) or floating (VDD= VSS = no connection), and remains within the leakage

performance specifications.

IS (FA)

VDD

VSS

GND

ID (FA)

N.C.

IS(FA) / ID(FA)

( |VS| > |VDD + VT| or |VSS - VT| )

Figure 8-4. Measurement Setup for Input and Output Leakage Current under Overvoltage Fault with

Normal Supplies

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TMUX7308F, TMUX7309F

SCDS403C – FEBRUARY 2021 – REVISED JULY 2023

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