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FST3245QSCX View Datasheet(PDF) - Fairchild Semiconductor

Part NameDescriptionManufacturer
FST3245QSCX 8-Bit Bus Switch Fairchild
Fairchild Semiconductor Fairchild
FST3245QSCX Datasheet PDF : 9 Pages
1 2 3 4 5 6 7 8 9
DC Electrical Characteristics
Typical values are at VCC = 5.0V and TA = 25°C.
Symbol
Parameter
Conditions
VCC (V)
TA=-40 to +85°C
Min. Typ. Max.
VIK
Clamp Diode Voltage
IIN = -18mA
VIH
High-Level Input Voltage
VIL
Low-Level Input Voltage
IIN
Input Leakage Current
0 VIN 5.5V
IOZ
Off-state Leakage
Current
0 A, B VCC
4.5
4.0 to 5.5 2.0
4.0 to 5.5
5.5
5.5
-1.2
0.8
±1.0
±1.0
VIN = 0V, IIN = 64mA
4.5
4
7
RON
Switch On Resistance(3) VIN = 0V, IIN = 30mA
4.5
VIN = 2.4V, IIN = 15mA
4.5
4
7
8
15
VIN = 2.4V, IIN = 15mA
4.0
11
20
ICC
Quiescent Supply Current
VIN = VCC or GND,
IOUT = 0
5.5
3
ΔICC
Increase in ICC per Input
One Input at 3.4V, Other
Inputs at VCC or GND
5.5
2.5
Note:
3. Measured by the voltage drop between the A and B pins at the indicated current through the switch. On
resistance is determined by the lower of the voltages on the A or B pins.
Units
V
V
V
µA
µA
Ω
µA
mA
AC Electrical Characteristics
TA = -40 to +85°C, CL = 50pF, and RU = RD = 500Ω.
Symbol
Parameter
Conditions
VCC = 4.5 – 5.5V VCC = 4.0V
Min. Max. Min. Max.
Units
Figure
tPHL, tPLH
Propagation Delay
Bus-to-Bus(4)
VIN = Open
0.25
0.25
ns
Figure 3
Figure 4
tPZH ,tPZL
Output Enable Time
VIN = 7V for tPZL
VIN = Open for
tPZH
1.5
5.9
6.4
ns
Figure 3
Figure 4
tPHZ, tPLZ
Output Disable Time
VIN = 7V for tPLZ
VIN = Open for
tPHZ
1.5
6.0
5.7
ns
Figure 3
Figure 4
Note:
4. 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
TA = +25°C, f = 1MHz. Capacitance is characterized, but not tested.
Symbol
CIN
CI/O
Parameter
Control Pin Input Capacitance
Input/Output Capacitance
Conditions
VCC = 5.0V
VCC, /OE = 5.0V
Typ.
3
5
Units
pF
pF
© 1997 Fairchild Semiconductor Corporation
FST3245 • Rev. 1.0.2
4
www.fairchildsemi.com
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