參數(shù)資料
型號: 74HCT244AM
英文描述: Dual 4-Bit Non-Inverting Buffer/Driver
中文描述: 雙4位非反向緩沖器/驅(qū)動器
文件頁數(shù): 5/13頁
文件大小: 80K
代理商: 74HCT244AM
1998 Sep 30
5
Philips Semiconductors
Product specification
Quad 2-input multiplexer; 3-state
74HC/HCT257
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
I
CC
category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
SYMBOL
PARAMETER
T
amb
(
°
C)
UNIT
TEST CONDITIONS
74HC
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
36
13
10
47
17
14
33
12
10
41
15
12
14
5
4
110
22
19
150
30
26
150
30
26
150
30
26
60
12
10
140
28
24
190
38
33
190
38
33
190
38
33
75
15
13
165
33
28
225
45
38
225
45
38
225
45
38
90
18
15
ns
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
Fig.6
t
PHL
/ t
PLH
propagation delay
S to nY
ns
Fig.6
t
PZH
/ t
PZL
3-state output enable time
OE to nY
ns
Fig.7
t
PHZ
/ t
PLZ
3-state output disable time
OE to nY
ns
Fig.7
t
THL
/ t
TLH
output transition time
ns
Fig.6
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