SC8560S Datasheet PDF - Silan Microelectronics

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SC8560S
Silan Microelectronics

Part Number SC8560S
Description Digital Alarm Clock
Page 10 Pages


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SC8560
DIGITAL ALARM CLOCK WITH LED DRIVER
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
SOP-28
SDIP-28
ORDERING INFORMATION
Part No.
SC8560
SC8560S
Package
SDIP-28-400-1.778
SOP-28-375-1.27
APPLICATIONS
* Alarm clocks
* Clock-radios
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV: 1.1 2008.06.02
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BLOCK DIAGRAM
SC8560
ABSOLUTE MAXIMUM RATINGS (Ta =25°C, Vss =0V)
Characteristics
Maximum Supply Voltage
Input Voltage 1
Input Voltage 2 (except pin 26)
Output Voltage
Input Clamp current( pin 26)
Allowable Power Dissipation
Operating Temperature
Storage Temperature
Symbol
VDD max.
VIN(1)
VIN(2)
VOUT
IIN
PD
Topr
Tstg
Condition
50/60Hz input
Except 50/60Hz input
50/60Hz input
Ta=70°C
Value
-15.0 ~ + 0.3
-15.0 ~ + 0.3
-15.0 ~ + 0.3
-15.0 ~ + 0.3
-0.4 ~ +0.4
700
-30 ~ +70
-55+125
Unit
V
V
V
V
mA
mW
°C
°C
ELECTRICAL CHARACTERISTICS (Tamb=25°C, VDD=-12.0V, VSS=0V, Unless otherwise specified)
Characteristics
Supply Voltage
Input “H” level Voltage
Input “L” level Voltage
Input “H” level Voltage
Input “L” level Voltage
50/60 Hz input pin input voltage
Input “H” level current(1)
Symbol
VDD
VIH(1)
VIL(1)
VIH(2)
VIL(2)
VAC-IN
IIH1
Test conditions
50/60Hz Input
50/60Hz Input
Except 50/60Hz input
Except 50/60Hz input
50/60Hz Input, VIN=VSS
Min
-14.0
-1.0
-1.5
VLED
Typ Max Unit
-7.5 V
V
VDD+2 V
V
VDD+2 V
V
10 μA
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV: 1.1 2008.06.02
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SC8560
(Continued)
Characteristics
Symbol
Test conditions
Min Typ Max Unit
Input “L” level current(1)
Input “H” level current(2)
Input “L” level current(2)
Output “H” level current(1)
Output leakage current(1)
Output “H” level current(2)
Output leakage current(2)
Output “H” level current(3)
Output leakage current(3)
Power failure detection voltage
Consumption current
Backup oscillator stability factor
Backup oscillator accuracy
IIL1 50/60Hz Input, VIN=VDD
10 μA
IIH2
IIL2
IOH1
IOF1
IOH2
IOF2
IOH3
IOF3
Input pins other than 50/60Hz
Input, VIN=VSS
Input pins other than 50/60Hz
Input, VIN=VDD
Alarm output and sleep
output, VOH=VSS-1V
Alarm output and sleep
output, VOUT=VDD
AM& 10’S HR ag&de (24H
mode),VOUT=VDD-1V
AM& 10’S HR ag&de (24H
mode),VOUT=VDD
Segment Output other than
those listed above ,
VOUT=Vss-1V
Segment Output other than
those listed above, VOUT=VDD
5
36
18
20 μA
10 μA
mA
10 μA
mA
20 μA
mA
20 μA
VDF
-7.5 -5.0
V
Output set to off and pull-
ICC down attached input set to
open
fs
Standard value,900Hz,
VDD= -9V±10%
5 7 mA
-10 10 %
fa
Standard value,900Hz,
VDD= -9V
-10
10 %
PIN CONFIGURATIONS
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV: 1.1 2008.06.02
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SC8560
DESCRIPTION OF OPERATIONS
Terminal Description
Operating Description
50/60 Hz Input:
Built-in Shumidt circuits 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
Display Mode Selective Input
(Alarm Select/Sleep Select )
When 50/60 selective input is connected to Vss,50Hz use is enable. When 50/60
selective input is left open, VDD is activated using an internal pull-down resistor
and the setting is switched to enable use at 60Hz.
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
12/24H Select Input
Power Failure Detection
display
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.
Leaving this pin unconnected (VDD) causes the 12-hour basis to be selected,
connecting this pin to VSS cause the 24-hour basis to be selected .An internal
pull-down resistor is provided.
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 VSS 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 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
Sleep
Timer
and
Sleep
Output:
procedure (59 minutes or l hour and 59 minute selection). This sleep timer
constructed using a down counter and when the counter content arrives at
is
[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.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV: 1.1 2008.06.02
Page 4 of 10



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