MC74LCX374_12 Datasheet, PDF (2/9 Pages) ON Semiconductor – Low-Voltage CMOS Octal D-Type Flip-Flop

MC74LCX374
V_CC O7 D7 D6 O6 O5 D5 D4 O4 CP
20 19 18 17 16 15 14 13 12 11
1
OE
11
CP
3
D0
4
D1
1 2 3 4 5 6 7 8 9 10
OE O0 D0 D1 O1 O2 D2 D3 O3 GND
Figure 1. Pinout: 20−Lead (Top View)
7
D2
8
D3
PIN NAMES
Pins
OE
CP
D0−D7
O0−O7
Function
Output Enable Input
Clock Pulse Input
Data Inputs
3−State Outputs
13
D4
14
D5
17
D6
18
D7
nCP
Q
D
nCP
Q
D
nCP
Q
D
nCP
Q
D
nCP
Q
D
nCP
Q
D
nCP
Q
D
nCP
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
CP
Dn
On
L
↑
l
L
L
↑
h
H
OPERATING MODE
Load and Read Register
L
↑
X
NC
Hold and Read Register
H
↑
X
Z
Hold and Disable Outputs
H
↑
l
Z
H
↑
h
Z
Load Internal Register and Disable Outputs
H = High Voltage Level
h = High Voltage Level One Setup Time Prior to the Low−to−High Clock Transition
L = Low Voltage Level
l = Low Voltage Level One Setup Time Prior to the Low−to−High Clock Transition
NC = No Change, State Prior to Low−to−High Clock Transition
X = High or Low Voltage Level and Transitions are Acceptable
Z = High Impedance State
↑ = Low−to−High Transition
↑ = Not a Low−to−High Transition; For I_CC Reasons, DO NOT FLOAT Inputs
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