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參數(shù)資料
| 型號(hào)： | 54HC244 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HC240: INVERTED - HC241/244 NON INVERTED OCTAL BUS BUFFER WITH 3 STATE OUTPUTS |
| 中文描述： | HC240：倒立- HC241/244非反相八路總線緩沖器3態(tài)輸出 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 270K |
| 代理商： | 54HC244 |
AC ELECTRICAL CHARACTERISTICS
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Symbol
Parameter
Test Conditions
Value
-40 to 85
o
C
74HC
Min.
Unit
V
CC
(V)
C
L
(pF)
T
A
= 25
o
C
54HC and 74HC
Min.
Typ.
25
-55 to 125
o
C
54HC
Min.
Max.
60
12
10
90
18
15
130
26
22
125
25
21
165
33
28
125
25
21
10
Max.
75
19
13
115
23
20
165
33
28
155
31
26
205
41
35
155
31
26
10
Max.
90
18
15
135
27
23
195
39
33
190
38
32
250
50
43
190
38
32
10
t
TLH
t
THL
Output Transition
Time
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
50
ns
7
6
t
PLH
t
PHL
Propagation
Delay Time
50
36
12
10
51
17
14
48
16
14
63
21
18
32
15
14
5
10
ns
150
ns
t
PZL
t
PZH
Output Enable
Time
50
R
L
= 1K
ns
150
R
L
= 1K
ns
t
PLZ
t
PHZ
Output Disable
Time
50
R
L
= 1K
ns
C
IN
C
OUT
Input Capacitance
Output
Capacitance
Power Dissipation
Capacitance
pF
pF
C
PD
(*)
HC240
HC241/244
31
33
pF
(*) C
PD
isdefined asthe value ofthe IC’sinternal equivalent capactance which is calculated from the operating current consumption without load.
(Refer to Test Circuit).Average operting current can be obtained by thefollowingequation. I
CC
(opr) = C
PD
V
CC
f
IN
+ I
CC
/8(per circuit)
TEST CIRCUIT I
CC
(Opr.)
HC240
M54/M74HC240/241/244
6/12
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