7.5 tON (VDD) and tOFF (VDD) Time

The tON (VDD) time is defined as the time taken by the output of the device to rise 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 7-5 shows the setup used to measure turn on time, denoted by the symbol tON (VDD)

1.5 V

t

ON

90%

10%

OUTPUT

0 V

V

DD

t

OFF

V

S

OUTPUT

R

L

C

L

D1

GND

0 V

t

r = 1

s

t

f = 1

s

V

DD

S1B

S1A

V

S

OUTPUT

R

L

C

L

D2

S2B

S2A

V

DD

1.5 V

Figure 7-5. tON (VDD) and tOFF (VDD) Time Measurement Setup

7.6 Transition Time

Transition time is defined as the time taken by the output of the device to rise or fall 10% after the control signal

has risen or fallen past the logic threshold. The 10% transition 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 7-6 shows the setup used to measure transition time, denoted by the symbol tTRANSITION.

VIH

VIL

tTRANSITION

10%

90%

OUTPUT

0 V

ADDRESS

DRIVE

(VSEL)

VDD

tTRANSITION

VS

OUTPUT

RL

CL

SELx

D1

GND

VSEL

0 V

tr < 5 ns

tf < 5 ns

VDD

VDD

0.1 F

S1A

S1B

VS

OUTPUT

RL

CL

D2

S2A

S2B

Figure 7-6. Transition-Time Measurement Setup

TMUX2889

SCDS464 – JUNE 2023

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