FSTU16862_06 Datasheet, PDF (4/7 Pages) Fairchild Semiconductor – 20-Bit Bus Switch with -2V Undershoot Protection

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 8)
0.25
0.25
ns V_I OPEN
Figures
2, 3
t_PZH, t_PZL Output Enable Time
1.0
5.9
6.4
ns
V_I 7V for t_PZL
V_I OPEN for t_PZH
Figures
2, 3
t_PHZ, t_PLZ Output Disable Time
1.0
6.9
7.4
ns
V_I 7V for t_PLZ
V_I OPEN for t_PHZ
Figures
2, 3
Note 8: 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 9)
Symbol
Parameter
Typ
C_IN
Control Pin Input Capacitance
3
C_I/O
Input/Output Capacitance “OFF State”
6
Note 9: 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
Undershoot Characteristic (Note 10)
Symbol
Parameter
Min
Typ
Max
Units
Conditions
V_OUTU
Output Voltage During Undershoot
2.5
V_OH - 0.3
V
Figure 1
Note 10: This test is intended to characterize the device’s protective capabilities by maintaining output signal integrity during an input transient voltage
undershoot event.
FIGURE 1.
Device Test Conditions
Parameter
V_IN
R₁ R₂
V_TRI
V_CC
Value
see Waveform
100K
11.0
5.5
Units
V
:
V
V
Transient
Input Voltage (V_IN) Waveform
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