C1=0.015μF
27k
R1=110k
4.7k
0.001μF
2.2k
2.2k
0.47μF
12HR
NC
60Hz
NC
4.7k
27k
f=900Hz
Silan
Semiconductors
28
12/24 CR 50/60Hz 50/60Hz Snooze Sleep HOUR MIN
HR Input Select Input Input Input
Set
Set
Select
V
DD
Alarm Alarm Sleep Alarm
Disp
Off
Out
Out
Vss
27
26
25
24
23
22
21
20
19
18
17
16
15
Backup
Battery
100k
SC8560
AM & PM & 10'S
HR
10'S HR 10'S HR c &
b&g
ag & de HR b HR c
HR
c&d
HR
a&f
MIN
a&f
Colon
Out
10'S
MIN
a&f
10'S
MIN
b&g
10'S 10'S
MIN MIN
MIN MIN e &
b&g c&d
c & d MIN e
CLOCK-RADIO APPLICATION CIRCUIT (Positive Power Supply)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
1
Duplex LED
a
7
2
3
4
5
6
7
8
9
10
11
12
13
NOTE:
1
Cycle 1
Cathode
Common
f
e
g
d
b
c
14
AC
2
This circuit is used as noise interference
stripper for the LW band.( Backup control
is enabled except for battery backup mode
Cycle 2
SC8560
Rev: 1.1
2003.06.26
12 Hour Display and 60Hz Circuit Diagram