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參數(shù)資料
| 型號： | HD74HC259 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Octal Bus Transceivers With 3-State Outputs 20-LCCC -55 to 125 |
| 中文描述： | 8位可尋址鎖存 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大小： | 46K |
| 代理商： | HD74HC259 |
HD74HC259
4
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
Propagation delay t
PHL
time
—
—
185 —
230
ns
Data to output
t
PLH
4.5
—
16
37
—
46
6.0
—
—
31
—
39
2.0
—
—
215 —
270
Latch select to output
4.5
—
20
43
—
54
6.0
—
—
37
—
46
2.0
—
—
200 —
250
Enable to output
4.5
—
17
40
—
50
6.0
—
—
34
—
43
t
PHL
2.0
—
—
155 —
195
ns
Clear to output
4.5
—
15
31
—
39
6.0
—
—
26
—
33
Pulse width
t
w
2.0
80
—
—
100
—
ns
Clear, Enable
4.5
16
6
—
20
—
6.0
14
—
—
17
—
Setup time
t
su
2.0
100 —
—
125
—
ns
Latch select or data to enable
4.5
20
5
—
25
—
6.0
17
—
—
21
—
Hold time
t
h
2.0
5
—
—
5
—
ns
Latch select or data to enable
4.5
5
–1
—
5
—
6.0
5
—
—
5
—
Output rise/fall
t
TLH
t
THL
2.0
—
—
75
—
95
ns
time
4.5
—
5
15
—
19
6.0
—
—
13
—
16
Input capacitance
Cin
—
—
5
10
—
10
pF
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