74LVT543 データシートの表示（PDF） - Philips Electronics
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74LVT543 Datasheet PDF : 12 Pages
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Philips Semiconductors
3.3V Octal latched transceiver with dual enable
(3-State)
Product specification
74LVT543
LOGIC SYMBOL (IEEE/IEC)
2
1EN3
23
G1
1
IC5
13
ZEN4 (AB)
11
GZ.
14
ZC6
3
V3
6D
4
5
6
7
8
9
10
22
5D
2V
21
20
19
18
17
16
15
SV00028
LOGIC DIAGRAM
DQ
LE
A0 3
DETAIL A
22 B0
QD
LE
A1 4
A2 5
A3 6
A4 7
A5 8
A6 9
A7 10
OEBA 2
EBA 23
LEBA 1
DETAIL A X 7
21 B1
20 B2
19 B3
18 B4
17 B5
16 B6
15 B7
13 OEAB
11 EAB
14 LEAB
SV00029
PIN DESCRIPTION
PIN NUMBER
14, 1
11, 23
13, 2
3, 4, 5, 6, 7, 8, 9, 10
22, 21, 20, 19, 18, 17, 16, 15
12
24
SYMBOL
LEAB / LEBA
EAB / EBA
OEAB / OEBA
A0 – A7
B0 – B7
GND
VCC
FUNCTION TABLE
OEXX
EXX
INPUTS
LEXX
An or Bn
H
X
X
X
X
H
X
X
L
↑
L
h
L
↑
L
l
L
L
↑
h
L
L
↑
l
L
L
L
H
L
L
L
L
L
L
H
X
H = High voltage level
h = High voltage level one set-up time prior to the Low-to-High
transition of LEXX or EXX (XX = AB or BA)
L = Low voltage level
l = Low voltage level one set-up time prior to the Low-to-High
transition of LEXX or EXX (XX = AB or BA)
FUNCTION
A to B / B to A Latch Enable input (active-Low)
A to B / B to A Enable input (active-Low)
A to B / B to A Output Enable input (active-Low)
Port A, 3-State outputs
Port B, 3-State outputs
Ground (0V)
Positive supply voltage
OUTPUTS
Bn or An
STATUS
Z
Disabled
Z
Disabled
Z
Z
Disabled + Latch
H
L
Latch + Display
H
L
Transparent
NC
Hold
X = Don’t care
↑ = Low-to-High transition of LEXX or EXX (XX = AB or BA)
NC= No change
Z = High impedance or “off” state
1998 Feb 19
3
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