(3)

The bus switch contributes no propagation delay other than the RC delay of the on resistance of the switch and the load capacitance.

The time constant for the switch alone is of the order of 0.25 ns for 10-pF load. This time constant is much smaller than the rise/fall

times of typical driving signals, therefore the time adds very little propagation delay to the system. Propagation delay of the bus switch,

when used in a system, is determined by the driving circuit on the driving side of the switch and its interactions with the load on the

driven side.

5.10 Typical Characteristics

–7

–6

–5

–4

–3

–2

–1

0

1E+6

1E+7

1E+8

1E+9

1E+10

Frequency (Hz)

Figure 5-1. Gain vs Frequency

–100

–70

–80

–90

–60

–50

–40

–30

–20

Frequency (Hz)

1E+6

1E+7

1E+8

1E+9

1E+10

Figure 5-2. OFF Isolation vs Frequency

-105

-95

-85

-75

-65

-55

-45

-35

-25

Frequency

1E+6

1E+7

1E+8

1E+9

1E+10

Figure 5-3. Crosstalk vs Frequency

VIN (V)

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

2

3

4

5

6

7

8

9

10

11

VCC=2.3V

VCC=3.0V

Figure 5-4. Ron vs VIN (IOUT = –30 mA)

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TS3USB221E

SCDS263E – SEPTEMBER 2009 – REVISED JULY 2024

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