VDD

VDD

S1A

GND

D1

VD

ID (OFF)

A

VS

S1B

S4A

D4

VD

ID (OFF)

A

VS

S4B

VDD

VDD

S1A

GND

D1

VD

VS

S1B

IS (OFF)

A

VD

S1A

D1

VD

VS

S1B

IS (OFF)

A

VD

V

Dx

VS

ISD

Sx

14

TMUX1574

SCDS391C – OCTOBER 2018 – REVISED DECEMBER 2019

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7 Parameter Measurement Information

7.1 On-Resistance

The on-resistance of a device is the ohmic resistance between the source (Sx) and drain (Dx) pins of the device.

The on-resistance varies with input voltage and supply voltage. The symbol RON is used to denote on-resistance.

The measurement setup used to measure RON is shown in Figure 27. Voltage (V) and current (ISD) are measured

using this setup, and RON is computed as shown below with RON = V / ISD:

Figure 27. On-Resistance Measurement Setup

7.2 Off-Leakage Current

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

off. This current is denoted by the symbol IS (OFF).

Drain leakage current is defined as the leakage current flowing into or out of the drain pin when the switch is off.

This current is denoted by the symbol ID (OFF).

The setup used to measure both off-leakage currents is shown in Figure 28.

Figure 28. Off-Leakage Measurement Setup