Alinco DX-70, Service Manual

Page: 32 / 116

CD
17) MB87086A (XA0297)
PLL Frequency Synthesizer
Crystal oscillator
{ > -
Amp
H >
© -& > — i-* it,
No. Pin Name
I/O
Description
1 OSC*
n
1
Crystal connection terminal
2
OSC
out O Crystal connection terrnma1
3 fv o
Phase comparator input monitor terminal
Comparator drvxJer output terminal
4
V
dd
Power supply
s Dop 0
Passive LPF connection terminal
tr>V Drive mode. Dop»'H"
fr-tv: High impedance
fr<tv: Sink moOe, Dop-'L"
6 Vss
GND terminal
7 LD o
Phase detect ex output terminal
lo c W H ', Uniock.negative pulse
8
fin
1 Comparator divider input termina1
Clock
Senal clock input terminal
10
Data
1
Senal data input lerminai
11
L£
1
Load enable inpcrt tormina I
1? Do*
0
Aclive LPF connection terminal
tr>fv Dnve mode, D o *-'L ‘
fr—tv: High impedance
fr<tv Sink mode. D o »- ’ H"
13
*
o
Phase comparator input monitor terminal
Re’erence divider oirtput terminal
14
NC
No connection
15
bv
o
Orfterential
LPF
connection terminal
16
b
R
o
f*>fv.
b
R »’ L’
b
V -‘ H', eR*"H"
tr<tv: oV-"L\ ® R »“H"
O S C
o u t
L Z Z
= D -
T f t t t t t t t t t t t t t t
16bit Latch I
i i t t i t t t t t i i t t i t .
Reference Divider
T T T f t f t t t t t
—+j lObit uaich j
i l l f f i L .
*| 10pt!
Programmable Counter }-
Charge
Charqe
Pump
-►—( F ) Dcp
Doa
—
& h