14.2 On-Leakage Current

Source on-leakage current is defined as the leakage current flowing into or out of the source pin when the switch

is on. This current is denoted by the symbol IS(ON). Drain on-leakage current is defined as the leakage current

flowing into or out of the drain pin when the switch is on. This current is denoted by the symbol ID(ON). Either the

source pin or drain pin is left floating during the measurement. Figure 14-2 shows the circuit used for measuring

the on-leakage current, denoted by IS(ON) or ID(ON).

VDD

VDD

SA

GND

VS

SB

D

VD

ID (ON)

VDD

VDD

SA

GND

VS

SB

D

Vs

A

IS (ON)

N.C.

N.C.

A

Figure 14-2. On-Leakage Measurement Setup

14.3 Off-Leakage Current

Source and drain off-leakage current is defined as the leakage current flowing into or out of the source or drain

pin when the switch is off. This current is denoted by the symbol IS(OFF) and ID(OFF). Figure 14-3 shows the setup

used to measure off-leakage current.

VDD

SA

SB

GND

VS

D

VD

A

IS (OFF)

VD

Figure 14-3. Off-Leakage Measurement Setup

14.4 Power-Off Leakage Current

Powered-off source and drain leakage current is defined as the leakage current flowing into or out of the source

or drain pin when the device is powered off. This current is denoted by the symbol IPS(OFF) and IPD(OFF). Figure

14-4 shows the setup used to measure off-leakage current.

VDD

SA

SB

GND

VS

D

VD

A

IPS (OFF)

VD

SA

SB

GND

VS

D

VD

A

IPD (OFF)

VD

VDD

Figure 14-4. Power-Off Leakage Measurement Setup

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TMUX4821, TMUX4819

SCDS487A – OCTOBER 2025 – REVISED DECEMBER 2025

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