TMUX7236 datasheet(19/35 Pages) TI

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7.7 tON (VDD) Time

The tON (VDD) time is defined as the time taken by the output of the device to rise to 90% after the supply has

risen past the supply threshold. The 90% measurement is used to provide the timing of the device turning on in

the system. Figure 7-7 shows the setup used to measure turn on time, denoted by the symbol tON (VDD).

VDD

Supply

Ramp

0 V

4.5 V

tON

90%

Output

tr = 10 µs

VDD

VSS

0.1 µF

S1A

GND

0 V

VDD

S1B

SELx

3 V

Output

S2A

S2B

Output

Figure 7-7. tON (VDD) Time Measurement Setup

7.8 Propagation Delay

Propagation delay is defined as the time taken by the output of the device to rise or fall 50% after the input signal

has risen or fallen past the 50% threshold. Figure 7-8 shows the setup used to measure propagation delay,

denoted by the symbol tPD.

VDD

VSS

VDD

VSS

0.1 µF

S1A

GND

S1B

250 mV

0 V

tPD 1

Output

0 V

tProp Delay = max ( tPD 1, tPD 2)

Input

(VS)

tr < 40ps

tf < 40ps

tPD 2

50%

Output

S2A

S2B

Output

Figure 7-8. Propagation Delay Measurement Setup

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TMUX7236

SCDS417 – MARCH 2022

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