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74LVC544A Datasheet(PDF) 3 Page - NXP Semiconductors

Part # 74LVC544A
Description  Octal D-type registered transceiver, inverting 3-State
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74LVC544A Datasheet(HTML) 3 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74LVC544A
Octal D-type registered transceiver, inverting
(3-State)
1998 Jul 29
3
PIN DESCRIPTION
PIN NUMBER
SYMBOL
FUNCTION
1
LEBA
‘B’ to ‘A’ latch enable input (active
LOW)
2
OEBA
‘B’ to ‘A’ output enable input (active
LOW)
3, 4, 5, 6,
7, 8, 9, 10
A0–A7
‘A’ data inputs/outputs
11
EBA
‘B’ to ‘A’ enable input (active LOW)
12
GND
Ground (0V)
22, 21, 20, 19,
18, 17, 16, 15
B0–B7
‘B’ data inputs/outputs
13
OEAB
‘A’ to ‘B’ output enable input (active
LOW)
14
LEAB
‘A’ to ‘B’ latch enable input (active
LOW)
23
EAB
‘A’ to ‘B’ enable input (active LOW)
24
VCC
Positive supply voltage
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
LEBA
OEBA
A0
A1
A2
A3
A4
A5
A6
A7
EAB
VCC
EBA
B0
B1
B2
B3
B4
B6
B5
B7
LEAB
OEAB
GND
SV00733
FUNCTION TABLE
INPUTS
OUTPUTS
STATUS
OEXX
EXX
LEXX
DATA
OUTPUTS
STATUS
H
X
X
X
Z
Disabled
X
H
X
X
Z
Disabled
L
L
L
L
h
l
Z
Z
Disabled + Latch
L
L
L
L
h
l
L
H
Latch + Display
L
L
L
L
L
L
H
L
L
H
Transparent
L
L
H
X
NC
Hold
XX
= AB for A-to-B direction, BA for B-to-A direction
H
= HIGH voltage level
L
= LOW voltage level
h
= HIGH state must be present one set-up time before the LOW-to-HIGH transition of LEAB, LEBA, EAB, EBA
l
= LOW state must be present one set-up time before the LOW-to-HIGH transition of LEAB, LEBA, EAB, EBA
X
= Don’t care
= LOW–to–HIGH level transition
NC
= No change
Z
= High impedance OFF-state


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