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FST3126
(Rev.:2013)

4-Bit Bus Switch

ON Semiconductor 

FST3126

AC Loading and Waveforms

FROM

OUTPUT

UNDER

TEST

VI

500 W

500 W

CL*

NOTES:

1. Input driven by 50 W source terminated in 50 W.

2. CL includes load and stray capacitance.

*CL = 50 pF

Figure 3. AC Test Circuit

SWITCH

INPUT

10 %

tPLH

tf = 2.5 nS

90 %

1.5 V

90 %

1.5 V

OUTPUT

1.5 V

tf = 2.5 nS

3.0 V

10 %

GND

tPLH

VOH

1.5 V

VOL

Figure 4. Propagation Delays

ENABLE

INPUT

tf = 2.5 nS

90 %

1.5 V

tPZL

OUTPUT

tPZH

OUTPUT

10 % 10 %

1.5 V

1.5 V

tf = 2.5 nS

90 % 3.0 V

1.5 V

GND

tPZL

VOL + 0.3 V

VOL

tPHZL

VOH

VOH − 0.3 V

Figure 5. Enable/Disable Delays

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