FST16245_05 Datasheet, PDF (3/4 Pages) Fairchild Semiconductor – 16-Bit Bus Switch

AC Electrical Characteristics
Symbol
Parameter
T_A 40 qC to 85 qC,
C_L 50pF, RU RD 500:
V_CC 4.5 – 5.5V
V_CC 4.0V
Units
Conditions
Figure
Number
Min
Max
Min
Max
t_PHL, t_PLH Propagation Delay Bus-to-Bus
(Note 7)
0.25
0.25
ns V_I OPEN
Figures
1, 2
t_PZH, t_PZL Output Enable Time
1.0
5.6
6.1
ns
V_I 7V for t_PZL
V_I OPEN for t_PZH
Figures
1, 2
t_PHZ, t_PLZ Output Disable Time
1.0
5.5
5.9
ns
V_I 7V for t_PLZ
V_I OPEN for t_PHZ
Figures
1, 2
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)
Symbol
Parameter
Typ
C_IN
Control Pin Input Capacitance
3
C_I/O
Input/Output Capacitance “OFF State”
6
Note 8: T_A 25qC, f 1 MHz, Capacitance is characterized but not tested.
Max
Units
pF
pF
Conditions
V_CC 5.0V, V_IN 0V
V_CC, OE 5.0V, V_IN 0V
AC Loading and Waveforms
Note: Input driven by 50: source terminated in 50:
Note: C_L includes load and stray capacitance
Note: Input PRR 1.0 MHz, t_W 500 ns
FIGURE 1. AC Test Circuit
FIGURE 2. AC Waveforms
3
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