74fst3257 ON Semiconductor, 74fst3257 Datasheet - Page 4

• Manufacturer Part Number: 74fst3257
• Description: Quad 2 1 Multiplexer/ Demultiplexer Bus Switch
• Manufacturer: ON Semiconductor

*Typical values are at V
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
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
8. T
CAPACITANCE
DC ELECTRICAL CHARACTERISTICS
AC ELECTRICAL CHARACTERISTICS
Symbol
Symbol
Symbol
t
t
DI
of the voltages on the two (A or B) pins.
t
typical On resistance of the switch and the 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance).
R
t
t
t
C
C
PZH
PHZ
V
V
I
PHL
C
V
I
PLH
PZL
PLZ
A
OZ
CC
I
ON
I/O
I/O
IH
CC
IK
IL
IN
I
= )25_C, f = 1 MHz, Capacitance is characterized but not tested.
,
,
,
Clamp Diode Resistance
High−Level Input Voltage
Low−Level Input Voltage
Input Leakage Current
Off−State Leakage Current
Switch On Resistance (Note 6)
Quiescent Supply Current
Increase In I
Prop Delay Bus to Bus (Note 7)
Prop Delay, Select to Bus A
Output Enable Time, Select to Bus B
Output Enable Time, I
Output Disable Time, Select to Bus B
Output Disable Time, I
Control Pin Input Capacitance
A Port Input/Output Capacitance
B Port Input/Output Capacitance
(Note 8)
CC
CC
Parameter
Parameter
Parameter
= 5.0 V and T
per Input
OE
OE
to Bus A, B
to Bus A, B
A
= 25_C.
I
0 v V
0 v A, B v V
V
V
V
V
V
One input at 3.4 V,
Other inputs at V
IN
V
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
I
I
I
I
I
CC
CC
CC
= *18mA
= OPEN
= 7 V for t
= OPEN for t
= 7 V for t
= OPEN for t
= 0 V, I
= 0 V, I
= 2.4 V, I
= 2.4 V, I
= V
, OE = 5.0 V
, OE = 5.0 V
http://onsemi.com
= 5.0 V
IN
CC
74FST3257
v 5.5 V
Conditions
Conditions
or GND, I
IN
IN
IN
IN
= 64 mA
= 30 mA
PZL
PLZ
CC
4
= 15 mA
= 15 mA
CC
PZH
PHZ
or GND
OUT
Conditions
= 0
4.0 to 5.5
4.0 to 5.5
V
V
4.5
5.5
5.5
4.5
4.5
4.5
4.0
5.5
5.5
Min
(V)
1.0
1.0
1.0
1.0
1.0
CC
CC
C
= 4.5−5.5 V
L
= 50 pF, RU = RD = 500 W
T
A
= *40_C to )85_C
Max
0.25
Min
2.0
4.7
5.2
5.1
5.2
5.5
T
A
= *40_C to )85_C
Typ*
Min
Typ
11
4
4
8
V
3
7
5
CC
= 4.0 V
*1.2
$1.0
$1.0
Max
Max
0.25
Max
0.8
2.5
5.2
5.7
5.6
5.5
5.5
15
20
7
7
3
Unit
Unit
Unit
mA
mA
mA
mA
pF
pF
pF
ns
ns
ns
W
V
V
V