參數(shù)資料
型號： TC74VHCT541AFK
廠商： Toshiba Corporation
英文描述： Octal Bus Buffer
中文描述： 八路總線緩沖器
文件頁數(shù)： 4/9頁
文件大?。?/td> 236K
代理商： TC74VHCT541AFK
TC74VHCT540,541AF/AFT/AFK
2007-10-01
4
Electrical Characteristics
DC Characteristics
Test Condition
Ta = 25°C
Ta =
40 to 85°C
Characteristics
Symbol
V
CC
(V)
Min
Typ.
Max
Min
Max
Unit
High-level input
voltage
V
IH
―
4.5 to
5.5
2.0
―
―
2.0
―
V
Low-level input
voltage
V
IL
―
4.5 to
5.5
―
―
0.8
―
0.8
V
I
OH
=
50
μ
A
4.5
4.40
4.50
―
4.40
―
High-level output
voltage
V
OH
V
IN
= V
IH
or V
IL
I
OH
=
8 mA
4.5
3.94
―
―
3.80
―
V
I
OL
= 50
μ
A
4.5
―
0.0
0.10
―
0.10
Low-level output
voltage
V
OL
V
IN
= V
IH
or V
IL
I
OL
= 8 mA
4.5
―
―
0.36
―
0.44
V
3-state output
off-state current
I
OZ
V
IN
= V
IH
or V
IL
V
OUT
= V
CC
or GND
5.5
―
―
±0.25
―
±2.50
μ
A
Input leakage
current
I
IN
V
IN
= 5.5 V or GND
0 to 5.5
―
―
±0.1
―
±1.0
μ
A
I
CC
V
IN
= V
CC
or GND
5.5
―
―
4.0
―
40.0
μ
A
Quiescent supply
current
I
CCT
Per input: V
IN
= 3.4 V
Other input: V
CC
or GND
5.5
―
―
1.35
―
1.50
mA
Output leakage
current
I
OPD
V
OUT
= 5.5 V
0
―
―
+0.5
―
+5.0
μ
A
AC Characteristics
(input: t
r
=
t
f
=
3 ns)
Test Condition
Ta = 25°C
Ta =
40 to 85°C
Characteristics
Symbol
V
CC
(V)
C
L
(pF)
Min
Typ.
Max
Min
Max
Unit
15
―
5.4
7.4
1.0
8.5
Propagation delay
time
(TC74VHCT540A)
t
pLH
t
pHL
―
5.0 ± 0.5
50
―
5.9
8.4
1.0
9.5
ns
15
―
5.0
6.9
1.0
8.0
Propagation delay
time
(TC74VHCT541A)
t
pLH
t
pHL
―
5.0 ± 0.5
50
―
5.5
7.9
1.0
9.0
ns
15
―
8.3
11.3
1.0
13.0
3-state output enable
time
t
pZL
t
pZH
R
L
= 1 k
5.0 ± 0.5
50
―
8.8
12.3
1.0
14.0
ns
3-state output disable
time
t
pLZ
t
pHZ
R
L
= 1 k
5.0 ± 0.5
50
―
9.4
11.9
1.0
13.5
ns
Output to output skew
t
osLH
t
osHL
(Note 1)
5.0 ± 0.5
50
―
―
1.0
―
1.0
ns
Input capacitance
C
IN
―
―
4
10
―
10
pF
Output capacitance
C
OUT
―
―
9
―
―
―
pF
Power dissipation
capacitance
C
PD
(Note 2)
―
19
―
―
―
pF
Note 1: Parameter guaranteed by design.
t
osLH
= |t
pLHm
t
pLHn
|, t
osHL
= |t
pHLm
t
pHLn
|
Note 2: C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
I
CC (opr)
= C
PD
·V
CC
·f
IN
+ I
CC
/8 (per bit)
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