MC74LCX373 Просмотр технического описания (PDF) - ON Semiconductor
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MC74LCX373 Datasheet PDF : 9 Pages
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MC74LCX373
VCC O7 D7 D6 O6 O5 D5 D4 O4 LE
20 19 18 17 16 15 14 13 12 11
1
OE
11
LE
3
D0
1 2 3 4 5 6 7 8 9 10
OE O0 D0 D1 O1 O2 D2 D3 O3 GND
Figure 1. Pinout (Top View)
4
D1
7
D2
8
D3
PIN NAMES
PINS
FUNCTION
OE
LE
D0-D7
O0-O7
Output Enable Input
Latch Enable Input
Data Inputs
3-State Latch Outputs
13
D4
14
D5
17
D6
18
D7
nLE
Q
D
nLE
Q
D
nLE
Q
D
nLE
Q
D
nLE
Q
D
nLE
Q
D
nLE
Q
D
nLE
Q
D
2
O0
5
O1
6
O2
9
O3
12
O4
15
O5
16
O6
19
O7
Figure 2. Logic Diagram
TRUTH TABLE
INPUTS
OUTPUTS
OE
LE
Dn
On
OPERATING MODE
L
H
H
L
H
L
H
L
Transparent (Latch Disabled); Read Latch
L
L
h
H
L
L
l
L
Latched (Latch Enabled) Read Latch
L
L
X
NC
Hold; Read Latch
H
L
X
Z
Hold; Disabled Outputs
H
H
H
H
H
L
Z
Z
Transparent (Latch Disabled); Disabled Outputs
H
L
h
H
L
l
Z
Z
Latched (Latch Enabled); Disabled Outputs
H = High Voltage Level
h = High Voltage Level One Setup Time Prior to the Latch Enable High-to-Low Transition
L = Low Voltage Level
l = Low Voltage Level One Setup Time Prior to the Latch Enable High-to-Low Transition
NC = No Change, State Prior to the Latch Enable High-to-Low Transition
X = High or Low Voltage Level or Transitions are Acceptable
Z = High Impedance State
For ICC Reasons DO NOT FLOAT Inputs
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