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參數(shù)資料
| 型號(hào)： | HD74HCT643 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Octal D-Type Edge Triggered Flip-Flops with 3-State Outputs 20-LCCC -55 to 125 |
| 中文描述： | 八路總線收發(fā)器（3態(tài)輸出） |
| 文件頁數(shù)： | 5/7頁 |
| 文件大?。?/td> | 52K |
| 代理商： | HD74HCT643 |
HD74HCT640/HD74HCT643
5
DC Characteristics
Ta = 25
°
C
Ta = –40 to
+85
°
C
Test Conditions
Item
Symbol
Min Typ Max Min
Max
Unit
V
CC
(V)
4.5 to
5.5
Input voltage
V
IH
2.0
—
—
2.0
—
V
V
IL
—
—
0.8
—
0.8
V
4.5 to
5.5
Output voltage
V
OH
4.4
—
—
4.4
—
V
4.5
Vin = V
IH
or V
IL
I
OH
= –20
μ
A
4.18 —
—
4.13
—
4.5
I
OH
= –6 mA
V
OL
—
—
0.1
—
0.1
V
4.5
Vin = V
IH
or V
IL
I
OL
= 20
μ
A
—
—
0.26 —
0.33
4.5
I
OL
= 6 mA
Off-state output
current
I
OZ
—
—
±
0.5 —
±
5.0
μ
A
5.5
Vin = V
IH
or V
,
Vout = V
CC
or GND
Vin = V
CC
or GND
Vin = V
CC
or GND, Iout = 0
μ
A
Input current
Iin
—
—
±
0.1 —
±
1.0
μ
A
μ
A
5.5
Quiescent current
I
CC
—
—
4.0
—
40
5.5
AC Characteristics
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Ta = 25
°
C
Ta = –40 to
+85
°
C
Test Conditions
Item
Symbol
Min Typ Max Min
Max
Unit
V
CC
(V)
4.5
Propagation delay t
PLH
time
—
13
18
—
23
ns
t
PHL
t
ZH
t
ZL
t
HZ
t
LZ
t
TLH
t
THL
Cin
—
16
18
—
23
4.5
Output enable
—
16
46
—
58
ns
4.5
time
—
16
46
—
58
4.5
Output disable
—
17
43
—
54
ns
4.5
time
—
21
43
—
54
4.5
Output rise/fall
time
—
4
12
—
15
ns
4.5
Input capacitance
—
5
10
—
10
pF
—
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