TMUX7308FPWR datasheet(30/54 Pages) TI2

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8.8 Fault Response Time

Fault response time (tREPONSE) measures the delay between the source voltage exceeding the supply voltage

(VDD or VSS) by 0.5 V and the drain voltage failing to 50% of the maximum output voltage. Figure 8-9 shows the

setup used to measure tRESPONSE.

0 V

tRESPONSE (VDD)

Output

VDD + 0.5 V

D/ DX

GND

All other

source

pins

0 V

Output

Output × 50%

VDD

0 V

tRESPONSE (VSS)

Output

VSS - 0.5 V

0 V

Output × 50%

VSS

tRESPONSE = max ( tRESPONSE(VDD), tRESPONSE(VSS))

VDD

VSS

VDD

VSS

GND

0.1 µF

GND

0.1 µF

Max positive fault

Max negative fault

60V/µs

ramp

60V/µs

ramp

Figure 8-9. Fault Response Time Measurement Setup

8.9 Fault Recovery Time

Fault recovery time (tRECOVERY) measures the delay between the source voltage falling from overvoltage

condition to below supply voltage (VDD or VSS) plus 0.5 V and the drain voltage rising from 0 V to 50% of

the final output voltage. Figure 8-10 shows the setup used to measure tRECOVERY.

tRECOVERY (VDD)

Output

VDD + 0.5 V

D/ DX

GND

All other

source

pins

0 V

Output

Output × 50%

Output

0 V

tRECOVERY = max ( tRECOVERY(VDD), tRECOVERY(VSS))

0 V

VSS - 0.5 V

0 V

Output x 50%

tRECOVERY (VSS)

VDD

VSS

VDD

VSS

GND

0.1 µF

GND

0.1 µF

Figure 8-10. Fault Recovery Time Measurement Setup

TMUX7308F, TMUX7309F

SCDS403C – FEBRUARY 2021 – REVISED JULY 2023

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