FST34170 datasheet(3/4 Pages) FAIRCHILD

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AC Electrical Characteristics

Note 7: This parameter is guaranteed by design but is not tested. The bus switch contributes no propagation delay other than the RC delay of the typical On

resistance of the switch and the 50pF load capacitance, when driven by an ideal voltage source (zero output impedance).

Capacitance (Note 8)

Note 8: TA = +25°C, f = 1 MHz, Capacitance is characterized but not tested.

AC Loading and Waveforms

Note: Input driven by 50

Ω source terminated in 50Ω

Note: CL includes load and stray capacitance, CL = 50 pF

Note: Input PRR

= 1.0 MHz, t

W = 500 ns

FIGURE 1. AC Test Circuit

FIGURE 2. AC Waveforms

Symbol

Parameter

TA = −40 °C to +85 °C,

Units

Conditions

Figure No.

CL = 50 pF, RU= RD = 500Ω

VCC = 4.5 − 5.5V

VCC = 4.0V

Min

Max

Min

Max

tPHL, tPLH

A or B, to B or A (Note 7)

0.25

VI = OPEN

Figures 1, 2

tPZH

Output Enable Time,

7.0

30.0

35.0

VI = OPEN for tPZH

Figures 1, 2

SEL to A, B

tPZL

Output Enable Time,

7.0

30.0

35.0

VI = 7V for tPZL

Figures 1, 2

SEL to A, B

tPHZ

Output Disable Time,

1.0

6.9

7.3

VI = OPEN for tPHZ

Figures 1, 2

SEL to A, B

tPLZ

Output Disable Time,

1.0

7.7

VI = 7V for tPLZ

Figures 1, 2

SEL to A, B

Symbol

Parameter

Typ

Max

Units

Conditions

CIN

Control pin Input Capacitance

VCC = 5.0V

CI/O OFF

Input/Output Capacitance “OFF State”

8pF

VCC = 5.0V, Switch OFF

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