FST3253MTCX View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
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FST3253MTCX Datasheet PDF : 5 Pages
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AC Electrical Characteristics
Symbol
Parameter
TA = −40 °C to +85 °C
CL = 50pF, RU = RD = 500Ω
VCC = 4.5 – 5.5V
VCC = 4.0V
Units
Conditions
Figure No.
Min
Max
Min
Max
tPHL,tPLH
Prop Delay Bus to Bus (Note 6)
Prop Delay, Select to Bus A
0.25
1.0
5.3
0.25
ns
VI = OPEN
6.3
Figure 1
Figure 2
tPZH, tPZL
Output Enable Time, Select to Bus B
1.0
5.3
Output Enable Time, IOE to Bus A, B
1.0
5.3
6.0
6.2
ns
VI = 7V for tPZL
VI = OPEN for tPZH
Figure 1
Figure 2
tPHZ, tPLZ
Output Disable Time., Select to Bus B 1.0
5.8
Output Disable Time, IOE to Bus A, B
1.0
5.5
6.2
6.2
ns
VI = 7V for tPLZ
VI = OPEN for tPHZ
Figure 1
Figure 2
Note 6: 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 the source (zero output impedance).
Capacitance (Note 7)
Symbol
Parameter
Typ
CIN
Control Pin Input Capacitance
3
A Port
13
CI/O
Input/Output Capacitance
B Port
5
Note 7: TA = +25°C, f = 1 MHz, Capacitance is characterized but not tested.
Max
Units
pF
pF
pF
Conditions
VCC = 5.0V
VCC, OE = 5.0V
AC Loading and Waveforms
Note: Input driven by 50 Ω source terminated in 50 Ω
Note: CL includes load and stray capacitance
Note: Input PRR = 1.0 MHz, tW = 500 ns
FIGURE 1. AC Test Circuit
FIGURE 2. AC Waveforms
3
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