8.1.5 Break-Before-Make

Break-before-make delay is a safety feature that prevents two inputs from connecting when the device is

switching. The output first breaks from the on-state switch before making the connection with the next on-state

switch. The time delay between the break and the make is known as break-before-make delay. Figure 8-5 shows

0 V

90%

Output

0 V

Input Select

OUTPUT

A0

A1

A2

S0

S1-S6

D

GND

S7

0.1…F

EN

Figure 8-5. Break-Before-Make Delay Measurement Setup

Turn-on time is defined as the time taken by the output of the device to rise to 10% after the enable has risen

past the 50% threshold. The 10% measurement is utilized to provide the timing of the device, system level timing

can then account for the time constant added from the load resistance and load capacitance. Figure 8-6 shows

Turn-off time is defined as the time taken by the output of the device to fall to 90% after the enable has fallen

past the 50% threshold. The 90% measurement is utilized to provide the timing of the device, system level timing

can then account for the time constant added from the load resistance and load capacitance. Figure 8-6 shows

0 V

90%

10%

OUTPUT

0 V

OUTPUT

S0

S1

D

GND

S7

0.1…F

A0

A1

A2

EN

50%

50%

Figure 8-6. Turn-On and Turn-Off Time Measurement Setup

TMUX1308-Q1, TMUX1309-Q1

SCDS414C – DECEMBER 2019 – REVISED AUGUST 2020

www.ti.com

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