MC74LCX543 Motorola, MC74LCX543 Datasheet - Page 2

• Manufacturer Part Number: MC74LCX543
• Description: LOW-VOLTAGE CMOS OCTAL LATCHING TRANSCEIVER
• Manufacturer: Motorola

H = High Voltage Level; h = High Voltage Level One Setup Time Prior to the Latch Enable or Enable Low–to–High Transition; L = Low Voltage Level;
l = Low Voltage Level One Setup Time Prior to the Latch Enable or Enable Low–to–High Transition; X = Don’t Care; * = The latches are not internally
gated with the Output Enables. Therefore, data at the A or B ports may enter the latches at any time, provided that the LExx and Exx pins are set
accordingly. For I CC reasons, Do Not Float Inputs.
FUNCTION TABLE
MC74LCX543
MOTOROLA
OEAB
H
H
L
OEBA
H
H
L
EAB
X*
X*
X
H
L
L
Inputs
OEBA
LEBA
EBA
A0
EBA
X*
X*
X
H
3
L
L
23
2
1
LEAB
D
LE
X
H
H
H
X
X
X
X
L
L
L
Q
LEBA
LOGIC DIAGRAM
X
H
X
X
X
X
H
H
L
L
L
DETAIL A x 7
2
Output
Input
Input
An
X
X
X
H
Z
Z
Z
H
H
h
h
L
h
L
L
l
l
l
Ports
Data
Q
Output
Input
Input
Bn
X
X
Z
Z
Z
H
H
X
H
LE
h
L
L
h
L
h
l
l
l
D
DETAIL A
Disable Outputs
Transparent Data; Outputs Disabled
Latch and Outputs Disabled
Load and B Outputs Disabled
Hold; B Outputs Disabled
Transparent A to B
Latch and Display B Outputs
Load and A Outputs Disabled
Hold; A Outputs DIsabled
Transparent B to A
Latch and Display A Outputs
13
11
14
22
B0
OEAB
EAB
LEAB
Operating Mode
Operating Mode
BR1339 — REV 3
LCX DATA