Silan
Semiconductors
SC8560
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
1
DIGITAL ALARM CLOCK
DESCRIPTION
The SC8560 is an alarm equipped digital clock IC with built-in
drivers capable of directly driving LED display equipment.
FEATURES
* Single chip P-channel ED MOS LSI
* LED direct drive using time division (duplex configuration)
* Wide operating power supply voltage range
* Built-in alarm function with 24-hour control
* Supports changeover between 12-hour AM/PM and 24-hour
displays
* Built-in battery backup CR oscillator
* Built-in automatic fast forward function for hour and minute
settings
* Built-in snooze function supporting repeat use
* Uses 50Hz as standard frequency
* Built-in sleep timer function (maximum intervals for 59 minutes or
1 hour and 59 minutes)
* Equipped with power failure display function
* 900Hz output for alarm tone
SDIP-28
SOP-28
ORDERING INFORMATION
Part No.
Package
SC8560 SDIP-28-400-1.778
SC8560S SOP-28-375-1.27
APPLICATIONS
* Alarm clocks
* Clock-radios
PIN CONFIGURATIONS
SC8560
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
AM & 10'S HR ag & de
10'S HR c & HR c
PM & 10'S HR b
HR b & g
HR c & d
HR a & f
10'S MIN a & f
10'S MIN b & g
10'S MIN c & d
10'S MIN e & MIN e
MIN b & g
MIN c & d
MIN a & f
COLON OUT
12/24 HR SELECT
CR INPUT
50/60Hz SELECT
50/60Hz INPUT
SNOOZE INPUT
SLEEP INPUT
HOUR SET
MIN SET
V
DD
ALARM DISP
ALARM OFF
SLEEP OUT
ALARM OUT
V
SS
Silan
Semiconductors
SC8560
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
2
BLOCK DIAGRAM
OSC
CTR
GATE
St
and by DET
1/
25 or
1/
30
1/
2
I
nput
Cont
r
o
l
Reset
Cont
r
o
l
PWR UP
Displ
ay
Contro
l
S.
Sam
ple
F. S
a
mp
l
e
2H
z
T
i
m
e
& S.
Sam
ple
S
e
c RS
TY
HL
D
T. RS
T
AL.
R
S
T
P
W
R UP
SEC
D
i
s
p
T. Di
sp
AL.
D
i
s
p
SL.
D
i
s
p
T
one
50/
60H
z
2H
z
SEC CTR
GATE
T Di
sp
&
S.
Sam
ple
1H
z
Ti
me
MIN. CTR
Ti
me
HR. CTR
Compar
at
or
Ti
me
&
F. S
a
mp
l
e
A
l
a
r
m MIN CTR
A
l
a
r
m HR. CTR
T
i
m
e
& F
.
Sam
ple
Alarm
& F
.
Sam
ple
Sleep C
T
R
Output
Decoder/D
river
Out
put
Cont
r
o
l
C
ont
rol
PF.
DET
Bl
ank &
Fl
ash
Sec
Ti
me
Al
ar
m
Sl
eep
26
50/
60H
z
28
27
25
21
22
19
23
24
18
17
16
50/
60Hz
Sel
ect
12/
24HR
Sel
ect
CR
I
nput
50/
60Hz
I
nput
Mi
nut
e
Set
Hour
Set
Al
ar
m
Di
spl
ay
Sl
eep
Di
spl
ay
Snooze
I
nput
Al
ar
m
OFF
Al
ar
m
Out
put
Sl
eep
Out
put
20
15
VDD
VSS
14
Col
on
Out
put
1
2
3
4
5
6
7
8
9
10
11
12
13
AM
& 10'
S H
R
ag & de
PM
& 10'
S H
R
b
1
0
'
S
HR c&
HR c
HR b
&
g
HR c&
d
HR a
&
f
10'
S M
I
N
a&f
10'
S M
I
N
b&g
10'
S M
I
N
c
&
d
10'
S M
I
N
e& M
i
n e
M
i
n b&g
Mi
n
c&
d
M
i
n a&f
Second
displ
ay
PW
R
UP
Silan
Semiconductors
SC8560
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
3
ABSOLUTE MAXIMUM RATINGS
(Ta =25
C, Vss =0V)
Characteristic
Symbol
Condition
Value
Unit
Maximum Supply Voltage
V
DD max.
-15.0 ~ + 0.3
V
Input Voltage 1
V
IN(1)
50/60Hz input
-15.0 ~ + 0.3
V
Input Voltage 2 (except pin 26)
V
IN(2)
Except 50/60Hz input
-15.0 ~ + 0.3
V
Output Voltage
V
OUT
-15.0 ~ + 0.3
V
Input Clamp current( pin 26)
I
IN
50/60Hz input
-0.4 ~ +0.4
mA
Allowable Power Dissipation
P
D
Ta=70
C
700 mW
Operating Temperature
Topr
-30 ~ +70
C
Storage Temperature
Tstg
-55
+125
C
ELECTRICAL CHARACTERISTICS
(Tamb=25
C, V
DD
=-12.0V, V
SS
=0V,Unless otherwise specified)
Parameter
Symbol
Test conditions
Min
Typ
Max
Unit
Supply Voltage
V
DD
-14.0
-7.5 V
Input "H" level Voltage
V
IH(1)
50/60Hz
Input
-1.0
V
Input "L" level Voltage
V
IL(1)
50/60Hz
Input
V
DD
+2
V
Input "H" level Voltage
V
IH(2)
Except 50/60Hz input
-1.5
V
Input "L" level Voltage
V
IL(2)
Except 50/60Hz input
V
DD
+2
V
50/60 Hz input pin input voltage
V
AC-IN
V
LED
V
Input "H" level current(1)
I
IH1
50/60Hz Input, V
IN
=V
SS
10
A
Input "L" level current(1)
I
IL1
50/60Hz Input, V
IN
=V
DD
10
A
Input "H" level current(2)
I
IH2
Input pins other than 50/60Hz
Input,V
IN
=V
SS
20
A
Input "L" level current(2)
I
IL2
Input pins other than 50/60Hz
Input,V
IN
=V
DD
10
A
Output "H" level current(1)
I
OH1
Alarm output and sleep output,
V
OH
=V
SS
-1V
5
mA
Output leakage current(1)
I
OF1
Alarm output and sleep output,
V
OUT
=V
DD
10
A
Output "H" level current(2)
I
OH2
AM& 10'S HR ag&de (24H
mode),V
OUT
=V
DD
-1V
36 mA
Output leakage current(2)
I
OF2
AM& 10'S HR ag&de (24H
mode),V
OUT
=V
DD
20
A
Output "H" level current(3)
I
OH3
Segment Output other than
those listed above , V
OUT
=Vss-
1V
18 mA
(To be continued)
Silan
Semiconductors
SC8560
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
4
(Continued)
Parameter
Symbol
Test conditions
Min
Typ
Max
Unit
Output leakage current(3)
I
OF3
Segment Output other than
those listed above, V
OUT
=V
DD
20
A
Power failure detection voltage
V
DF
-7.5 -5.0
V
Consumption current
I
CC
Output set to off and pull-down
attached input set to open
5 7
mA
Backup oscillator stability factor
fs
Standard value,900Hz,
V
DD
= -9V
10%
-10 10
%
Backup oscillator accuracy
fa
Standard value,900Hz,
V
DD
= -9V
-10 10
%
DESCRIPTION OF OPERATIONS
Terminal Description
Operating Description
50/60 Hz Input:
Built-in Shumidt circuit enable noise elimination at 50/60Hz commercial
frequencies with use of a simple CR filter. Built-in pull-up resistor.
CR Input
When the AC power supply is interrupted, the time counter switches to a holding
state and a built-in oscillator promptly begins operation. If 50/60Hz input
continuous for 3 clocks without arriving, this oscillator's output is activated and
functions as the time counter clock in place of 50/60Hz input. The frequency level
of this clock oscillator is determined according to the CK Value. While the above
mentioned oscillator is operating using backup mode, all segment output is
switched to OFF. (Note) When the backup oscillator is in use due to an AC power
supply interruption, the 50/60Hz input pin must be maintained open or at a Vss
level.
50/60Hz Selective Input
When 50/60 selective input is connected to Vss,50Hz use is enable. When 50/60
selective input is left open, V
DD
is activated using an internal pull-down resistor
and the setting is switched to enable use at 60Hz.
Display Mode Selective Input
(Alarm Select/Sleep Select )
Since the pull-down resistor is built-in, selection from four display modes is
possible using two SPST switches (single-pole and single-throw switches). Table l
shows these display mode selections.
Time Setting Input
There are two setting inputs for use with "hour" and "minute". Time content
settings shown in Table 2 are possible by activating Vss to these pins. A pull-down
resister is built-in.
12/24H Select Input
Leaving this pin unconnected (V
DD
) causes the 12-hour basis to be selected,
connecting this pin to V
SS
cause the 24-hour basis to be selected .An internal pull-
down resistor is provided.
(To be continued)
Silan
Semiconductors
SC8560
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
5
(Continued)
Terminal Description
Operating Description
Power Failure Detection display
If the power supply voltage drops and is applied again, all the on-segments flash
and the power failure indication mode is entered. The power failure indication
mode is released by applying V
SS
to "hour set" or " minutes set".
Alarm Operation and Alarm
Output
The alarm signal outputs when alarm content marches the time .When not reset
by either snooze input or alarm off input, output continues after l hour and 59
minutes. This output signal consists of 900 Hz 2 Hz intermittent (50% duty)
modulation signals. When the need arises, a filter can be applied to alter the alarm
signal to a DC signal.
Snooze Input
When the alarm is sounding and instantly activating Vss to this pin, alarm output is
set to OFF for a period between 8 and 9 minutes after which time the alarm signal
is once again output .The snooze function can be used repeatedly in l hour and 59
minutes intervals. A pull-down resist is built-in. Activating Vss to the snooze pin
when the alarm is OFF resets the sleep timer counter to [0:00].(This is known as
the one-touch sleep timer reset function.)
Alarm Off Input
Activating this input pin to Vss instantly sets alarm output to OFF. A pull-down
resistor is built-in.
Sleep Timer and Sleep Output:
Sleep output can turn on the radio and can be set for time intervals of 59 minutes
or l hour and 59 minutes. Refer to Table 2 for the proper selection procedure (59
minutes or l hour and 59 minute selection). This sleep timer is constructed using a
down counter and when the counter content arrives at [00], output is set to off and
the radio turns off .Adding Vss to snooze input turns sleep output off, when sleep
output is on.
TABLE 1: DISPLAY MODES
Selective
Input
Alarm
Sleep
Display Mode
Digit No.1
Digit No.2
Digit No.3
Digit No.4
NC NC Time
display
10's place for
hour ,AM/PM
Hour
10's place for
minute
Minute
Vss
NC Alarm
display
10's place for
hour ,AM/PM
Hour
10's place for
minute
Minute
NC Vss Sleep
display
Clear
Hour
10's place for
minute
Minute
Vss
Vss Second
display
Clear
Minute
10's place for
second
Second
Note: Activating Vss using two inputs simultaneously (alarm select and sleep select), the display mode is switched
to display seconds.
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