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74FST3257 Folha de dados(PDF) 4 Page - ON Semiconductor

Nome de Peças 74FST3257
Descrição Electrónicos  Quad 2:1 Multiplexer/Demultiplexer Bus Switch
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Fabricante Electrônico  ONSEMI [ON Semiconductor]
Página de início  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

74FST3257 Folha de dados(HTML) 4 Page - ON Semiconductor

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DC ELECTRICAL CHARACTERISTICS
VCC
TA = *40_C to )85_C
Symbol
Parameter
Conditions
(V)
Min
Typ*
Max
Unit
VIK
Clamp Diode Resistance
IIN = *18mA
4.5
*1.2
V
VIH
High−Level Input Voltage
4.0 to 5.5
2.0
V
VIL
Low−Level Input Voltage
4.0 to 5.5
0.8
V
II
Input Leakage Current
0
v VIN v 5.5 V
5.5
$1.0
mA
IOZ
Off−State Leakage Current
0
v A, B v VCC
5.5
$1.0
mA
RON
Switch On Resistance (Note 6)
VIN = 0 V, IIN = 64 mA
4.5
4
7
W
VIN = 0 V, IIN = 30 mA
4.5
4
7
VIN = 2.4 V, IIN = 15 mA
4.5
8
15
VIN = 2.4 V, IIN = 15 mA
4.0
11
20
ICC
Quiescent Supply Current
VIN = VCC or GND, IOUT = 0
5.5
3
mA
DICC
Increase In ICC per Input
One input at 3.4 V,
Other inputs at VCC or GND
5.5
2.5
mA
*Typical values are at VCC = 5.0 V and TA = 25_C.
6. Measured by the voltage drop between A and B pins at the indicated current through the switch. On resistance is determined by the lower
of the voltages on the two (A or B) pins.
AC ELECTRICAL CHARACTERISTICS
TA = *40_C to )85_C
CL = 50 pF, RU = RD = 500 W
VCC = 4.5−5.5 V
VCC = 4.0 V
Symbol
Parameter
Conditions
Min
Max
Min
Max
Unit
tPHL,
tPLH
Prop Delay Bus to Bus (Note 7)
VI = OPEN
0.25
0.25
ns
Prop Delay, Select to Bus A
1.0
4.7
5.2
tPZH,
tPZL
Output Enable Time, Select to Bus B
VI = 7 V for tPZL
1.0
5.2
5.7
ns
Output Enable Time, IOE to Bus A, B
VI = OPEN for tPZH
1.0
5.1
5.6
tPHZ,
tPLZ
Output Disable Time, Select to Bus B
VI = 7 V for tPLZ
1.0
5.2
5.5
ns
Output Disable Time, IOE to Bus A, B
VI = OPEN for tPHZ
1.0
5.5
5.5
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 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance).
CAPACITANCE (Note 8)
Symbol
Parameter
Conditions
Typ
Max
Unit
CIN
Control Pin Input Capacitance
VCC = 5.0 V
3
pF
CI/O
A Port Input/Output Capacitance
VCC, OE = 5.0 V
7
pF
CI/O
B Port Input/Output Capacitance
VCC, OE = 5.0 V
5
pF
8. TA = )25_C, f = 1 MHz, Capacitance is characterized but not tested.


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