MC74LCX374
Low-Voltage CMOS
Octal D-Type Flip-Flop
With 5 VTolerant Inputs and Outputs
(3State, NonInverting)
MC74LCX374
1
OE
11
CP
2
CP
V O7 D7 D6 O6 O5 D5 D4 O4 CP
O0
CC 3 Q
D0 D
20 19 18 17 16 15 14 13 12 11
5
CP
O1
4
Q
D1 D
6
CP
O2
7
Q
1 2 3456 7 8 9 10
D2 D
OE O0 D0 D1 O1 O2 D2 D3 O3 GND
9
CP
Figure 1. Pinout: 20Lead (Top View) O3
8
Q
D3
D
12
CP
O4
13
Q
D4 D
PIN NAMES
15
CP
Pins Function
O5
14
Q
D5
D
OE Output Enable Input
CP Clock Pulse Input
16
CP
D0D7 Data Inputs
O6
17
Q
D6 D
O0O7 3State Outputs
19
CP
O7
18
Q
D7
D
Figure 2. LOGIC DIAGRAM
TRUTH TABLE
INPUTS OUTPUTS
OE CP Dn On OPERATING MODE
L l L
Load and Read Register
L h H
L X NC Hold and Read Register
H X Z Hold and Disable Outputs
H l Z
Load Internal Register and Disable Outputs
H h Z
H = High Voltage Level
h = High Voltage Level One Setup Time Prior to the LowtoHigh Clock Transition
L = Low Voltage Level
l = Low Voltage Level One Setup Time Prior to the LowtoHigh Clock Transition
NC = No Change, State Prior to LowtoHigh Clock Transition
X = High or Low Voltage Level and Transitions are Acceptable
Z = High Impedance State
= LowtoHigh Transition
= Not a LowtoHigh Transition; For I Reasons, DO NOT FLOAT Inputs
CC