NC7WB3125(2003) Просмотр технического описания (PDF) - Fairchild Semiconductor
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NC7WB3125 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 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
Typ
Max
Units
Conditions
2.5
pF
VCC = 0V
6
pF
VCC = 5.0V = OE
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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