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參數(shù)資料
| 型號： | HD74HC590 |
| 廠商： | Hitachi,Ltd. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-bit Binary Counter/Register (with 3-state outputs) |
| 中文描述： | 8位二進制計數(shù)器/寄存器（3態(tài)輸出） |
| 文件頁數(shù)： | 6/11頁 |
| 文件大小： | 66K |
| 代理商： | HD74HC590 |
HD74HC590
6
AC Characteristics
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Ta = 25
°
C
Ta = –40 to
+85
°
C
Item
Symbol
V
CC
(V)
2.0
Min Typ Max Min
Max
Unit
Test Conditions
Maximum clock
f
max
—
—
5
—
4
MHz
frequency
4.5
—
—
25
—
20
6.0
—
—
29
—
24
Propagation delay t
PLH
time
2.0
—
—
200 —
250
ns
CCK to
RCO
t
PHL
4.5
—
18
40
—
50
6.0
—
—
34
—
43
t
PLH
2.0
—
—
250 —
315
ns
CCLR
to
RCO
4.5
—
17
50
—
63
6.0
—
—
43
—
54
t
PLH
t
PHL
2.0
—
—
200 —
250
ns
RCK to Q
4.5
—
18
40
—
50
6.0
—
—
34
—
43
Output enable
t
ZL
t
ZH
2.0
—
—
150 —
190
ns
time
4.5
—
16
30
—
39
6.0
—
—
26
—
33
Output disable
t
LZ
t
HZ
2.0
—
—
150 —
190
ns
time
4.5
—
17
30
—
38
6.0
—
—
26
—
33
Pulse width
t
w
2.0
80
—
—
100
—
ns
4.5
16
6
—
20
—
6.0
14
—
—
17
—
Removal time
t
rem
2.0
5
—
—
5
—
ns
CCLR
to CCK
4.5
5
—
—
5
—
6.0
5
—
—
5
—
Setup time
t
su
2.0
100 —
—
125
—
ns
CCKEN
to CCK
4.5
20
–3
—
25
—
6.0
17
—
—
21
—
2.0
200 —
—
250
—
ns
CCK to RCK
4.5
40
10
—
50
—
6.0
34
—
—
43
—
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