Alinco DX-70, Service Manual

Page: 29 / 116

11) BU4094BF (XA0246)
8-Stage Shift Register
T r u t h T a b l e
Clock
Output
enable
Strobe Data
Parallel outputs
Serial outputs
Q1 On
Qs Q's
L
X X
Z
Z 07 No Chg.
— L _
L X
X
Z
z
No Chg. Qs
_ J “
H I X
No Chg. No Chg.
Q7 No Chg.
- J T -
H H L
L
Qn-1 07 No Chg.
H H H
H
Qn-1 07 No Chg.
H X X
No Chg.
No Chg. No Chg. Os
Z*High Impedance
X=Don*t Care
B l o c k D i a g r a m
PARALLEL
OUTPUTS
Q's-v SERIAL
Os/OUTPUT
STROBE d
1
16 d ] V
dd
SERIAL
IN
d
2
15 d
Output
Enable
CLOCK
d 3
U3
14 d
05
01
d 4
C
4^
O
<£>
CD
13 d
06
02
d
5
12
d
07
Q3 d
6
“T1
11
d
Q
8
04
d 7
10
d Q's
Vss d
8
9 d Os
12) MC12019D (XA0292)
Two-Modulus Prescaler
B l o c k D i a g r a m
Control
tnput
1
Characteristics
Symbol
Min.
Typ Max Unit
Toggle Irequency fmax
225
MHz
{Sine wave input)
tmin
- -
20
Supply current
Icc
- 7.5
mA
Control input High (1/20) VIH
2.0
- -
V
Control input Low (1/21)
VIL -
0.8
V
Output voltage swing Vout 600
1200
mVpp
Input voltage sensitivity
Vin
200
800
mVpp
PLL response time tPLL
-
tout-
70
ns