Alinco DJ-G5, Service Manual

Page: 12 / 73

2) BU4094BF (XA0246)
8-Stage Shift Register
S T R O B E
S E R IA L
IN
C L O C K
Q1
Q 2
Q 3
Q 4
Vss
1 16
2
15
3
00
14
4
c
13
5
o
CO
-p* 12
6
00
■n
11
7 10
8 9
V
d d
Output
Enable
Q 5
0 6
Q 7
Q 8
Q's
Q s
Block Diagram
S E R IA L
IN O ' ­
C L O C K O —
S T R O B E O — L
O U T P IJ T
q
15
E N AB LE
8-S T A G E S H IF T R E G IS T E R
8 -B IT LA TC H E S
3 -S T A G E O U T P U T S
X
Q1
P A RA LLEL
O U T P U T S
10
O Q'S'v S E R IA L
- O Q s / O U T P U T
Q8
Truth Table
Clock
Output
enable
Strobe D ata
Parallel outputs Serial outputs
Q1
Q n Q s Q's
L
X
X
Z Z
Q 7
No Chg.
—L_ L
X
X z
Z
No Chg.
Q s
H
L
X
No Chg. No Chg. Q 7
No Chg.
—S~
H H
L L
Qn-1 Q 7 No Chg.
S ~
H H H H Qn-1 Q 7 No Chg.
H
X X
No Chg. No Chg. No Chg. Q s
Z=H igh Im pedance
X =D on't C are
15