FST16245 Datasheet, PDF (3/4 Pages) Fairchild Semiconductor – 16-Bit Bus Switch

AC Electrical Characteristics
T_A = −40 °C to +85 °C,
Symbol
Parameter
C_L = 50pF, RU = RD = 500Ω
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 = +25°C, 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 50Ω source terminated in 50Ω
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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