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參數(shù)資料
| 型號： | 74HCT182D-T |
| 英文描述： | Look-Ahead Carry Generator |
| 中文描述： | 超前卡里發(fā)生器 |
| 文件頁數(shù)： | 6/13頁 |
| 文件大小： | 80K |
| 代理商： | 74HCT182D-T |
1998 Sep 30
6
Philips Semiconductors
Product specification
Quad 2-input multiplexer; 3-state
74HC/HCT257
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
I
CC
category: MSI
Note to HCT types
The value of additional quiescent supply current (
I
CC
) for a unit load of 1 is given in the family specifications.
To determine
I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
INPUT
UNIT LOAD COEFFICIENT
nI
0
nI
1
OE
S
0.40
0.40
1.35
0.70
SYMBOL
PARAMETER
T
amb
(
°
C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+
25
40 to
+
85
40 to
+
125
min.
typ.
max.
min.
max.
min.
max.
t
PHL
/ t
PLH
propagation delay
nI
0
to nY
nI
1
to nY
t
PHL
/ t
PLH
propagation delay
S to nY
t
PZH
/ t
PZL
3-state output enable time
OE to nY
t
PHZ
/ t
PLZ
3-state output disable time
OE to nY
t
THL
/ t
TLH
output transition time
16
30
38
45
ns
4.5
Fig.6
20
35
44
53
ns
4.5
Fig.6
15
30
38
45
ns
4.5
Fig.7
16
30
38
45
ns
4.5
Fig.7
5
12
15
18
ns
4.5
Fig.6
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