74ABT843 データシートの表示（PDF） - Philips Electronics
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74ABT843 Datasheet PDF : 14 Pages
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Philips Semiconductors
9-bit bus interface latch with set and reset
(3-State)
Product specification
74ABT843
LOGIC SYMBOL
LOGIC SYMBOL (IEEE/IEC)
2 3 4 5 6 7 8 9 10
D0 D1 D2 D3 D4 D5 D6 D7 D8
13
LE
14
PRE
11
MR
1
OE
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8
23 22 21 20 19 18 17 16 15
SA00251
1
EN
11
R
14
S2
13
C1
2
1D
3
4
5
6
7
8
9
10
FUNCTION TABLE
INPUTS
OUTPUTS
OPERATING MODE
OE
PRE
MR
LE
Dn
Qn
L
L
X
X
X
H
Preset
L
H
L
X
X
L
Clear
L
H
H
H
L
L
H
H
H
H
L
H
Transparent
L
H
H
↓
l
L
H
H
↓
h
L
H
Latched
H
X
X
X
X
Z
High impedance
L
H
H
L
X
NC
Hold
H=
h=
L=
l=
NC=
X=
Z=
↓=
High voltage level
High voltage level one set-up time prior to the High-to-Low LE transition
Low voltage level
Low voltage level one set-up time prior to the High-to-Low LE transition
No change
Don’t care
High impedance “off” state
High-to-Low transition
23
22
21
20
19
18
17
16
15
SA00252
1998 Jan 16
3
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