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Silan Semiconductors
DIGITAL ALARM CLOCK
DESCRIPTION
The SC8560 is an alarm equipped digital clock IC with built-in drivers capable of directly driving LED display equipment.
SC8560
SOP-28
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
ORDERING INFORMATION
Part No.
SC8560 SC8560S
Package
SDIP-28-400-1.778 SOP-28-375-1.27
APPLICATIONS
* Alarm clocks * Clock-radios
PIN CONFIGURATIONS
AM & 10'S HR ag & de PM & 10'S HR b 10'S HR c & HR c HR b & g HR c & d HR a & f 10'S MIN a & f 10'S MIN b & g 10'S MIN c & d 1 2 3 4 5 6 7 8 9 28 12/24 HR SELECT 27 CR INPUT 26 50/60Hz SELECT 25 50/60Hz INPUT 24 SNOOZE INPUT 23 SLEEP INPUT
SC8560
22 HOUR SET 21 MIN SET 20 VDD 19 ALARM DISP 18 ALARM OFF 17 SLEEP OUT 16 ALARM OUT 15 VSS
10'S MIN e & MIN e 10 MIN b & g 11 MIN c & d 12 MIN a & f 13 COLON OUT 14
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
1
50/60Hz Select 26 CTR GATE
50/60Hz 2Hz T Disp & S. Sample 1Hz 50/60Hz
12/24HR Select 28 1 AM & 10'S HR ag & de 2 PM & 10'S HR b 3 10'S HR c& HR c SEC CTR GATE 4 HR b&g
Time MIN. CTR Time HR. CTR
BLOCK DIAGRAM
CR 27 Input 1/25 or 1/30 PF. DET Blank & Flash 1/2
OSC
50/60Hz 25 Input
Tone
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Stand by DET
Minute Set
S. Sample
21 Input Control
F. Sample 2Hz Time & S. Sample Time & F. Sample
Hour 22 Set Time
Sec
5 HR c&d 6 HR a&f 7 10'S MIN a&f 8 10'S MIN b&g 9 10'S MIN c&d 10 10'S MIN e& Min e 11 Min b&g 12 Min c&d
PWR UP
Reset Control Comparator
PWR UP Alarm MIN CTR Time & F. Sample Sleep CTR PWR UP Control Alarm & F. Sample
Display Control
Sleep Display
23
SEC Disp T. Disp AL. Disp SL. Disp
Sleep
Snooze Input
24
Second display
Output Control
Output Decoder/Driver
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Sec RSTYHLD T. RST AL. RST Alarm HR. CTR
2
Alarm 15 VSS 14 Colon Output 18 Alarm OFF 16 17 Alarm Sleep Output Output
Alarm Display
19
13 Min a&f
20
SC8560
Rev: 1.1
VDD
2003.06.26
Silan Semiconductors
ABSOLUTE MAXIMUM RATINGS
Characteristic
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 (Ta =25C, Vss =0V)
SC8560
Condition
50/60Hz input Except 50/60Hz input
Symbol
VDD max. VIN(1) VIN(2) VOUT IIN PD Topr Tstg
Value
-15.0 ~ + 0.3 -15.0 ~ + 0.3 -15.0 ~ + 0.3 -15.0 ~ + 0.3
Unit
V V V V mA mW C C
50/60Hz input Ta=70C
-0.4 ~ +0.4 700 -30 ~ +70 -55 +125
ELECTRICAL CHARACTERISTICS (Tamb=25C, VDD=-12.0V, VSS=0V,Unless otherwise specified)
Parameter
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) 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) IOH3
Symbol
VDD VIH(1) VIL(1) VIH(2) VIL(2) VAC-IN IIH1 IIL1 IIH2 IIL2 IOH1 IOF1 IOH2 IOF2
Test conditions
50/60Hz Input 50/60Hz Input Except 50/60Hz input Except 50/60Hz input
Min
-14.0 -1.0
Typ
Max
-7.5
Unit
V V
VDD+2 -1.5 VDD+2 VLED
V V V V A A A A mA
50/60Hz Input, VIN=VSS 50/60Hz Input, VIN=VDD 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=Vss1V 18 36 5
10 10 20 10
10
A mA
20
A mA
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
3
Silan Semiconductors
(Continued)
SC8560
Test conditions
Segment Output other than those listed above, VOUT=VDD -7.5 Output set to off and pull-down attached input set to open Standard value,900Hz, VDD= -9V 10% Standard value,900Hz, VDD= -9V -10 10 % -10 10 % -5.0 5 7 V mA
Parameter
Output leakage current(3) Power failure detection voltage Consumption current Backup oscillator stability factor Backup oscillator accuracy
Symbol
IOF3 VDF ICC fs fa
Min
Typ
Max
20
Unit
A
DESCRIPTION OF OPERATIONS
Terminal Description
50/60 Hz Input:
Operating Description
Built-in Shumidt circuit enable noise elimination at 50/60Hz commercial frequencies with use of a simple CR filter. Built-in pull-up resistor. 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
CR Input
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. When 50/60 selective input is connected to Vss,50Hz use is enable. When 50/60
50/60Hz Selective Input
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. 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,
Display Mode Selective Input (Alarm Select/Sleep Select )
Time Setting Input
12/24H Select Input
connecting this pin to VSS cause the 24-hour basis to be selected .An internal pulldown resistor is provided. (To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
4
Silan Semiconductors
(Continued)
SC8560
Operating Description
Terminal Description
If the power supply voltage drops and is applied again, all the on-segments flash Power Failure Detection display and the power failure indication mode is entered. The power failure indication mode is released by applying VSS to "hour set" or " minutes set". The alarm signal outputs when alarm content marches the time .When not reset Alarm Operation and Alarm Output 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. 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 Snooze Input 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 procedure (59 Sleep Timer and Sleep Output: 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
NC Vss NC Vss
Display Mode
Digit No.1
10's place for hour ,AM/PM 10's place for hour ,AM/PM
Digit No.2
Digit No.3
10's place for minute 10's place for minute 10's place for minute 10's place for second
Digit No.4
Sleep
NC NC Vss Vss Time display Alarm display Sleep display Clear Second display Clear Minute Hour Hour Hour Minute Minute Minute Second
Note: Activating Vss using two inputs simultaneously (alarm select and sleep select), the display mode is switched to display seconds.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
5
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TABLE 2: SETTING CONTENTS
Display Mode Set lnput
HOUR
SC8560
Functions
lmmediately adds 1 to hour digits and then assigns an additional 1. at a speed of 2 Hz , after each 1/4 to 3/4 second . lmmediately adds 1 to minute digits and then assigns an additional 1. at a
Time
MIN
speed of 2 Hz, after each 1/4 to 3/4 second . Seconds are reset.
BOTH HOUR(Note) Second (Alarm&Sleep) BOTH MIN
Operates both as outline above. Second digits are cleared to [00]. Time holds. Resets hour and minute digits as [0:00] when operating in 24-Hmode or [12:00] when operating in 12-H mode. lmmediately adds 1to hour digits and then assigns an additional 1, at a speed of 2 Hz, after each 1/4to 3/4 second. lmmediately adds 1 to minute digits and then assigns an additional 1, at a speed of 2 Hz, after each 1/4to 3/4 second. Resets hour and minute digits to [0:00] when operating in 24-hour mode or [12:00] when operating in, 12-hour mode. Sets sleep counter to [0:59] instantly when VDD is activated to sleep select. Sets sleep counter to [1:59] instantly when VDD is activated to sleep select and hour at the same time. Sleep counter looses 1 at a speed of 2 Hz Sleep counter looses 1 at a speed of 2 Hz
HOUR
Alarm
MIN
BOTH HOUR MIN BOTH
Sleep
Once conditions have been switched to reset or hold, input of other functions is locked until HOUR and MIN input have separated.
Note: When the digital reading for seconds is between 30 and 59 seconds, 1 is added to digits for minutes as the digital reading for seconds resets to [00]
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
6
C1=0.015F 27k R1=110k 4.7k 0.001F 2.2k 2.2k 0.47F 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 VDD 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
Piezo Buzzer
C1 0.015F
R1 110k
f=900Hz 0.001F
Silan Semiconductors
12HR NC
60Hz NC
28
12/24 CR 50/60Hz 50/60Hz Snooze Sleep HOUR MIN HR Input Select Input Input Input Set Set Select VDD Alarm Alarm Sleep Alarm Disp Off Out Out Vss
27
26
25
330F
24
23
22
21
20
19
18
17
16
15
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 MIN a&f HR a&f 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 Colon Out
CLOCK APPLICATION CIRCUIT (Negative Power Supply)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
1 2 3 4 5 6 7 8 9 10 11 12 13 14
a
8
NOTE: 1
Cycle 1
Cathode Common
f g e d
AC
b c
2
When Battery backup or tone output is not used, CR input is connected to Vss.
Cycle 2
SC8560
Rev: 1.1
2003.06.26
12 Hours Display and 60Hz Circuit diagram
Silan Semiconductors
PACKAGE OUTLINE
SC8560
UNIT:mm
SDIP-28-400-1.778
SOP-28-375-1.27
UNIT:mm
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
9
Silan Semiconductors
Attachment Revision History
Data
2000.12.31
SC8560
REV
1.0 Original Add "SOP-28-375-1.27"
Description
Page
1, 9 1 1
2003.06.26
1.1
Add" ORDERING INFORMATION" DEL"FUNCTIONS"
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.1 2003.06.26
10

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