NC7WB3125 查看數據表（PDF） - Fairchild Semiconductor
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NC7WB3125 Datasheet PDF : 10 Pages
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AC Electrical Characteristics
Symbol
Parameter
tPHL,
tPLH
tPZL,
tPZH
tPLZ,
tPHZ
Propagation Delay Bus-to-Bus
(Note 6)
Output Enable Time
Output Disable Time
VCC
(V)
4.0 to 5.5
4.5 to 5.5
4.0
4.5 to 5.5
4.0
TA 40qC to 85qC,
CL 50 pF, RU RD 500:
Min
Typ
Max
0.25
0.8
2.5
4.2
0.8
3.0
4.6
0.8
3.1
4.8
0.8
2.9
4.4
Units
Conditions
ns
VI OPEN
ns
VI 7V for tPZL
VI 0V for tPZH
ns
VI 7V for tPLZ
VI 0V for tPHZ
Figure
Number
Figures
1, 2
Figures
1, 2
Figures
1Figure 2
Note 6: This parameter is guaranteed by design. 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
CIN
CI/O (OFF)
CI/O (ON)
Parameter
Control Pin Input Capacitance
Port Off Capacitance
Switch ON Capacitance
AC Loading and Waveforms
Typ
2.5
6.0
12.0
Max
Units
pF
pF
pF
Conditions
VCC 0V
VCC 5.0V OE
VCC 5.0V, OE 0V
Input driven by 50: source terminated in 50:
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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