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INTEGRAL
IL8560
CLOCK CIRCUIT
FEATURES * LED direct drive by time-sharing (duplex) * Wide operating voltage range * Alarm on a 24-hour basis * Time format: 12-hour AM/PM and 24hour * On-chip RC-oscillator for battery backup * 50Hz or 60Hz is usable as the reference frequency * Possible to automatically advance "hours", "minutes" * Sleep timer (max. 59 minutes or 1 hour 59 minutes) * Repeatedly usable snooze * * * * Power failure indicator 900Hz output for alarm tone Bare chip or SOP-28 are available Pin-to-Pin replacement with Sanyo LM8560 FUNCTIONS * Real time display * Alarm with snooze * Sleep timer (max. 59 minutes or 1 hour 59 minutes) PIN CONNECTION
OPERATION DESCRIPTION
50Hz/60Hz Input:
CR Input:
50/60 select input:
Display mode select input (alarm display/sleep display);
The on-chip Schmitt trigger circuit allows a simple RC filter at the input to remove possible line voltage transients. An internal pull-up resister is provided. Then AC power-down occurs, the time counter enters the "hold" mode and the on-chip clock oscillator starts operating immediately. If there is no input at "50/60 Hz input" during 3-clock period, this oscillator controls the time counter advance instead of "50/60Hz input". The values of CR determine the frequency of the on-chip clock oscillator. All segment outputs are off during backup oscillator operation. NOTE: If the backup OSC is used at the power-down mode, "50/60Hz input" must be open or at Vss level. Connecting "50/60Hz select" to Vss enables 50Hz operation. For 60Hz operation, "50/60Hz select" is left unconnected: Pull-down to VDD is provided by the internal pulldown resister. The internal pull-down resistor allows the use of 2 SPST (single-pole singlethrow) switches to select 4 display modes listed in Table 1.
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BELMICROSYSTEMS
INTEGRAL
IL8560
Table 1. Display Mode
Select Input Alarm Sleep NC NC Vc,s NC NC Vss V..s Vss Display Mode Time display Alarm display Sleep display Seconds display Digit No.l 10's hour, AM/PM 10's hour, AM/PM Blanked Blanked Digit No.2 Hour Hour Hour Minute Digit No.3 10's minute 10's minute 10's minute 10's second Digit No.4 Minute Minute Minute Second
NOTE: If Vss is applied to both input of "alarm display" and "sleep display" simultaneously, the seconds display mode is entered. Time setting input: Two setting inputs for "hours" and "minutes" are provided. The application of Vgg causes the time setting in Table 2 to occur. An internal pull-down resistor each is provided.
Table 2. Display Mode
Display Mode Set Input Time HOUR MIN Seconds (Alarm & Sleep) Alarm BOTH HOUR (Note) MIN BOTH HOUR MIN Sleep BOTH HOUR MIN BOTH Functions "Hours" are incremented +1 immediately and advance at a 2Hz rate 1/4 to 3/4 second later. "Minutes" are incremented +1 immediately and advance at a 2Hz rate 1/4 to 3/4 second later. "Seconds" are reset Both operations shown above are performed. "Seconds" are cleared to [00]. "Hold" mode. "Hours" and "Minutes" are reset to (0:00) (24hour basis) or (12:00) (12hour basis). "Hours" are incremented +1 immediately and advance at a 2Hz rate 1/4 to 3/4 second later. "Minutes" are incremented +1 immediately and advance at a 2Hz rate 1/4 to 3/4 second later. "Hours" and "Minutes" are reset to [0:00] (24-hour basis) or [12:00] (12-hour basis). The moment. VDD is applied to "sleep display", the sleep counter is set to [0:59]. The moment VDD is applied to "sleep display" and "hour set" simultaneously, the sleep counter is set to (1:59). The sleep counter counts down at a 2Hz rate. The sleep counter counts down at a 2Hz rate.
Once the reset mode or hold mode is entered, another function input is locked until both "hour set" input and "minute set" input are released. Note: When "seconds" display is at 50 to 59, "seconds" are reset to [00] and a carry occurs to "minutes" +1.
* 12/24-hour select input: Leaiving this pin unconnected (VDD) causes the 12-hour basis to be selected; connecting this pin to VSS causes the 24-hour basis to be selected. An internal pulldown resistor is provided. It 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" When the alarm set time is reached, the alarm signal is delivered. This signal continues to be delivered for 1 hour 59 minutes unless reset by "alarm off" or "snooze input". This signal is provided for the tone-signal of 900Hz with 50% duty of 2Hz gated. A simple LPF can be used to turn this alarm signal into DC signal as required. By momentarily connecting this pin to VSS at the alarm on-state, the alarm output is inhibited for 8 to 9 minutes, after which used repeatedly for 1 hour 59 minutes. An
* Power failure indication:
* Alarm operation and alarm output:
* Snooze input:
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BELMICROSYSTEMS
INTEGRAL
IL8560
* Alarm off input: * Sleep timer and sleep output: internal pull-down resistor is provided. By connecting "snooze input" to VSS at the alarm off-state, the sleep timer counter is reset to [0:00]. (The sleep timer is reset with one * touch.) Connecting this input pin to VSS inhibits the alarm output momentarily. An internal pulldown resistor is provided. The sleep output can be used to keep the radio turned on for any period of time up to 59 minutes or 1 hour 59 minutes. Table 2 shows how to select the period (59 minutes or 1 hour 59 minutes). This sleep timer uses a down counter. When the counter contents reach [00], the output stops being delivered, turning off the radio. By connecting "snooze input" to VSS at the sleep output on-state, the sleep output is inhibited.
ABSOLUTE MAXIMUM RATINGS (T. = 25oC )
Characteristic Maximum Supply Voltage Input Voltage Output Voltage Input Clamp Current (50/60Hz Input) Allowable Power Dissipation (TA = 70C) Operating Temperature Storage Temperature Symbol VDD VIN VOUT IIN Pdmax TA Tstg Value -15 - + 0.3 -15 - + 0.3 -15 -+ 0.3 -0.4 - + 0.4 0.7 - 30 - + 70 - 55 - + 125 Unit V V V mA W C C
ALLOWABLE OPERATING RANGES (T.=25C, Vss=0V)
Characteristic Supply Voltage Input High Voltage Input Low Voltage Input Voltage on 50/60Hz input Symbol VDD VIH VIL VAC-IN Test Condition Min -14.0 -1.0 -1.5
VLED
Typ
Max -7.5
Unit V V V V
50/60Hz input Other inputs All inputs Referenced to Vgg
VDD+2
ELECTRICAL CHARACTERISTICS (T. = 25C, VDD= -12V; unless otherwise specified)
Characteristic High Level Output Voltage Pins 1 Symbol VOH Test Condition VIH=-1,5V, VIL=VDD+2V, IOH=36mA IOH=5 mA IOH=18 mA, CL=150pF IOL=0,02mA IOL=0,01mA IOL=0,02mA UTEST=12V UTEST=12V -55% UTEST=12V Min -15% -15% -15% VDD+20,2 V VDD+20,2 VDD+20,2 105% A A 205% A A mA 75% Max Unit V
16,17 2-14 Low Level Output Voltage 1 16,17 2-14 Output Leakage Current 25 Output Leakage Current Supply Current
VOL
IIH IIL 18,19,21- IIH 24,26,28 IIL 20 IDD
-105%
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BELMICROSYSTEMS
INTEGRAL
IL8560
BLOCK DIAGRAM
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BELMICROSYSTEMS
INTEGRAL
IL8560
SAMPLE APPLICATION CIRCUIT FOR CLOCK RADIO USE (+ power supply)
SAMPLE APPLICATION CIRCUIT FOR CLOCK USE (-power supply)
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BELMICROSYSTEMS
INTEGRAL
IL8560
PAD LAYOUT
The substrate is connected to VDD. PAD LOCATION
Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Pad Name AM & 10'S HR ag PM & 10'S HR b 10'S HR c & HR e HR b & g HRc &d HR a & f 10'S MIN ,a & f 10'S MIN b & g 10'S MIN c & d 10'S MIN e & MIN b & g -MIN c & d MIN a & f COLON OUT
X 486 786 1111 1306 1306 1306 1306 1306 1306 1306 1306 638 338 38
y -1533 -1533 -1533 -1533 -515 -67 233 595 895 1195 1533 1533 1533 1533
Pad No. 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Pad Name Vss ALARM OUT SLEEP OUT r *"**'* ALARM OFF ALARM DISP
X
Y 1533 1533 1533 1533 1255 551 320 79 -142 -1160 -1533 -1533 -1533 -1533
-223 -660 -900 -1306 -1306 VDD -1306 MIN SET -1306 HOUR SET -1306 SLEEP INPUT -1306 SNOOZE INPUT -1306 50/601-tz INPUT -1306 oO/eOHz SELECT -832 CR INPUT -416 12/2-1 HR -218
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BELMICROSYSTEMS

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