參數(shù)資料
型號: 74HC244
廠商: NXP Semiconductors N.V.
英文描述: Octal buffer/line driver; 3-state
中文描述: 八路緩沖器/線路驅(qū)動器,3態(tài)
文件頁數(shù): 5/7頁
文件大?。?/td> 39K
代理商: 74HC244
December 1990
5
Philips Semiconductors
Product specification
Octal buffer/line driver; 3-state
74HC/HCT244
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
1A
n
to 1Y
n;
2A
n
to 2Y
n
3-state output enable time
1OE to 1Y
n;
2OE to 2Y
n
3-state output disable time
1OE to 1Y
n;
2OE to 2Y
n
output transition time
30
11
9
36
13
10
39
14
11
14
5
4
110
22
19
150
30
26
150
30
26
60
12
10
145
28
24
190
38
33
190
38
33
75
15
13
165
33
28
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
Fig.5
t
PZH
/ t
PZL
ns
Fig.6
t
PHZ
/ t
PLZ
ns
Fig.6
t
THL
/ t
TLH
ns
Fig.5
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