NC7WB3306(2003) 查看數據表（PDF） - Fairchild Semiconductor
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NC7WB3306 Datasheet PDF : 9 Pages
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AC Electrical Characteristics
TA = −40°C to +85°C
Symbol
Parameter
VCC
CL = 50 pF, RU = RD = 500Ω Units
Conditions
Figure
(V)
Min
Typ
Max
Number
tPHL,
tPLH
Propagation Delay Bus-to-Bus
(Note 6)
4.0 to 5.5
0.25
ns VI = OPEN
Figures
1, 2
tPZL,
tPZH
Output Enable Time
4.5 to 5.5 0.8
2.5
4.2
ns
VI = 7V for tPZL
4.0
0.8
3.0
4.6
VI = 0V for tPZH
Figures
1, 2
tPLZ,
tPHZ
Output Disable Time
4.5 to 5.5 0.8
3.1
4.8
ns
VI = 7V for tPLZ
4.0
0.8
2.9
4.4
VI = 0V for tPHZ
Figures
1, 2
Note 6: This parameter is guaranteed. The bus switch contributes no propagation delay other than the RC delay of the typical On Resistance of the switch
and the 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance). The specified limit is calculated on this basis.
Capacitance
Symbol
Parameter
Typ
Max
Units
Conditions
CIN
Control Pin Input Capacitance
2.5
pF
VCC = 0V
CI/O (OFF)
Port OFF Capacitance
6
pF
VCC = 5.0V = OE
CI/O (ON)
Switch ON Capacitance
12
pF
VCC = 5.0V, OE = 0V
AC Loading and Waveforms
Input driven by 50Ω source terminated in 50Ω.
CL includes load and stray capacitance.
Input PRR = 1.0 MHz tw = 500 ns.
FIGURE 1. AC Test Circuit
FIGURE 2. AC Waveforms
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