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參數資料
| 型號： | 27256 |
| 廠商： | 意法半導體 |
| 英文描述： | NMOS 256K 32K x 8 UV EPROM |
| 中文描述： | NMOS管256K 32K的× 8紫外線存儲器 |
| 文件頁數： | 4/9頁 |
| 文件大小： | 62K |
| 代理商： | 27256 |
M74HC51
4/9
AC ELECTRICAL CHARACTERISTICS
(C
L
= 50 pF, Input t
r
= t
f
= 6ns)
CAPACITIVE CHARACTERISTICS
1) C
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
TEST CIRCUIT
C
L
= 50pF or equivalent (includes jig and probe capacitance)
R
T
= Z
OUT
of pulse generator (typically 50
)
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25
°
C
-40 to 85
°
C
-55 to 125
°
C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
t
TLH
t
THL
Output Transition
Time
2.0
4.5
6.0
2.0
4.5
6.0
30
8
7
39
13
11
75
15
13
100
20
17
95
19
16
125
25
21
110
22
19
150
30
26
ns
t
PLH
t
PHL
Propagation Delay
Time
ns
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25
°
C
-40 to 85
°
C
-55 to 125
°
C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
C
IN
C
PD
Input Capacitance
Power Dissipation
Capacitance (note
1)
5.0
5
10
10
10
pF
5.0
32
pF
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