MC74HC390A Datasheet, PDF (5/8 Pages) ON Semiconductor – Dual 4-Stage Binary Ripple Counter with ÷2 and ÷5 Sections

MC74HC390A
TEST CIRCUIT
TEST POINT
OUTPUT
DEVICE
UNDER
TEST
CL*
*Includes all probe and jig capacitance
Figure 3.
EXPANDED LOGIC DIAGRAM
CLOCK A ^{1, 15}
CQ
D _RQ
3, 13 _QA
CLOCK B ^{4, 12}
CQ
DQ
R
5, 11 _QB
CQ
DQ
R
6, 10 _QC
RESET ^{2, 14}
C
D _RQ
7, 9 _QD
TIMING DIAGRAM
(QA Connected to Clock B)
0
1
2
3
4
5
6
78
9
0
1
2
3
4
5
6
CLOCK A
RESET
QA
QB
QC
QD
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