參數(shù)資料
型號(hào): 74HCT243
廠商: NXP Semiconductors N.V.
英文描述: Quad bus transceiver; 3-state
中文描述: 四總線收發(fā)器,三態(tài)
文件頁(yè)數(shù): 5/8頁(yè)
文件大?。?/td> 49K
代理商: 74HCT243
December 1990
5
Philips Semiconductors
Product specification
Quad bus transceiver; 3-state
74HC/HCT243
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
A
n
to B
n
;
B
n
to A
n
3-state output enable time
OE
A
to A
n
or B
n;
OE
B
to A
n
or B
n
3-state output disable time
OE
A
to A
n
or B
n;
OE
B
to A
n
or B
n
output transition time
22
8
6
50
18
14
61
22
18
14
5
4
90
18
15
150
30
26
165
33
28
60
12
10
115
23
20
190
38
33
205
41
35
75
15
13
135
27
23
225
45
38
250
50
43
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
Figs 6 and 7
t
PHZ
/ t
PLZ
ns
Figs 6 and 7
t
THL
/ t
TLH
ns
Fig.5
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