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參數(shù)資料
| 型號(hào)： | 74FST3245DT |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-Bit Bus Switch |
| 中文描述： | CBT/FST/QS/5C/B SERIES, 8-BIT DRIVER, TRUE OUTPUT, PDSO20 |
| 封裝： | LEAD FREE, TSSOP-20 |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大?。?/td> | 85K |
| 代理商： | 74FST3245DT |
74FST3245
http://onsemi.com
3
DC ELECTRICAL CHARACTERISTICS
V
CC
T
A
= –40 C to
85 C
Symbol
Parameter
Conditions
(V)
Min
Typ*
Max
Unit
V
IK
Clamp Diode Resistance
I
IN
= –18mA
4.5
–1.2
V
V
IH
High–Level Input Voltage
4.0 to 5.5
2.0
V
V
IL
Low–Level Input Voltage
4.0 to 5.5
0.8
V
I
I
Input Leakage Current
0
V
IN
5.5 V
5.5
1.0
A
I
OZ
OFF–STATE Leakage Current
0
A, B
V
CC
5.5
1.0
A
R
ON
Switch On Resistance (Note 6)
V
IN
= 0 V, I
IN
= 64 mA
4.5
4
7
V
IN
= 0 V, I
IN
= 30 mA
4.5
4
7
V
IN
= 2.4 V, I
IN
= 15 mA
4.5
8
15
V
IN
= 2.4 V, I
IN
= 15 mA
4.0
11
20
I
CC
Quiescent Supply Current
V
IN
= V
CC
or GND, I
OUT
= 0
5.5
3
A
I
CC
Increase In I
CC
per Input
*Typical values are at V
CC
= 5.0 V and T
A
= 25 C.
6. Measured by the voltage drop between A and B pins at the indicated current through the switch.
One input at 3.4 V, Other inputs at V
CC
or GND
5.5
2.5
mA
AC ELECTRICAL CHARACTERISTICS
Limits
T
A
= –40 C to
85 C
V
CC
= 4.5 to 5.5 V
V
CC
= 4.0 V
Symbol
Parameter
Conditions
Figures
Min
Max
Min
Max
Unit
t
PHL
,
t
PLH
Prop Delay Bus to Bus
(Note 7)
V
I
= OPEN
3 and 4
0.25
0.25
ns
t
PZH
,
t
PZL
Output Enable Time
V
I
= 7 V for t
PZL
V
I
= OPEN for t
PZH
3 and 4
1.5
5.9
6.4
ns
t
PHZ
,
t
PLZ
Output Disable Time
V
I
= 7 V for t
V
I
= OPEN for t
PHZ
3 and 4
1.5
6.0
5.7
ns
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
C
IN
Control Pin Input Capacitance
V
CC
= 5.0 V
3
pF
C
I/O
8. T
A
=
Input/Output Capacitance
V
CC
, OE = 5.0 V
5
pF
25 C, f = 1 MHz, Capacitance is characterized but not tested.
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