TMUX7348F datasheet(28/54 Pages) TI1

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7.3 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 7-3 shows the circuit used for measuring the on-leakage currents.

VDD VSS

VFP VFN

GND

IS(ON)

GND

N.C.

VDD VSS

VFP VFN

GND

ID(ON)

GND

N.C.

Figure 7-3. On-Leakage Measurement Setup

7.4 Input and Output Leakage Current Under Overvoltage Fault

If any of the source pin voltage goes above the fault supplies (VFP or VFN), the overvoltage protection

feature of the TMUX7348F-EP is triggered to turn off the switch under fault, keeping the fault channel in

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 7-4) or abnormal operating condition (Figure 7-5).

During abnormal operating condition, the supply (or supplies) can either be unpowered (VDD= VSS = VFN =

VFP = 0 V) or floating (VDD= VSS = VFN = VFP = No Connection), and remains within the leakage performance

specifications.

IS (FA)

GND

ID (FA)

N.C.

IS(FA) / ID(FA)

( |VS| > |VFP + VT| or |VFN - VT| )

VDD

VSS

VFP

VFN

Figure 7-4. Measurement Setup for Input and Output Leakage Current under Overvoltage Fault with

Normal Supplies

TMUX7348F-EP

SCDS461A – NOVEMBER 2023 – REVISED JANUARY 2025

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