MC74LCX74_05 Datasheet, PDF (2/8 Pages) ON Semiconductor – Low-Voltage CMOS Dual D-Type Flip-Flop With 5 V−Tolerant Inputs

V_CC CD2 D2 CP2 SD2 O2 O2
14 13 12 11 10 9 8
MC74LCX74
4
SD1
2
D1
3
CP1
1
CD1
SD
D
Q
CP
Q
CD
5
O1
6
O1
1234567
CD1 D1 CP1 SD1 O1 O1 GND
Figure 1. Pinout: 14−Lead (Top View)
PIN NAMES
Pins
CP1, CP2
D1−D2
CD1, CD2
SD1, SD2
On−On
Function
Clock Pulse Inputs
Data Inputs
Direct Clear Inputs
Direct Set Inputs
Outputs
10
SD2
12
D2
11
CP2
13
CD2
SD
D
Q
CP
Q
CD
9
O2
8
O2
Figure 2. Logic Diagram
TRUTH TABLE
Inputs
SDn CDn CPn
Dn
L
H
X
X
H
L
X
X
L
L
X
X
H
H
↑
h
H
H
↑
l
H
H
↑
X
Outputs
On
On
H
L
L
H
H
H
H
L
L
H
NC
NC
Operating Mode
Asynchronous Set
Asynchronous Clear
Undetermined
Load and Read Register
Hold
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
X = High or Low Voltage Level and Transitions are Acceptable
↑ = Low−to−High Transition
↑ = Not a Low−to−High Transition
For I_CC reasons, DO NOT FLOAT Inputs
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