UTC LM8560

MOS IC

UTC

UNISONIC TECHNOLOGIES CO., LTD.

1

QW-R502-005,D

DIGITAL ALARM CLOCK

DESCRIPTION

The LM8560 is alarm equipped digital clock IC with built-in

driver capable of directly driving LED display equipment. As IC
himself the VDD pin for the LM8560 is graded to withstand a
voltage of 15V.

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
*Users 50Hz or 60Hz as standard frequency
*Built-in automatic fast forward function for hour and minute
settings
*Built-in sleep timer function (maximum intervals of 59 minutes
or 1 hours and 59 minutes)
*Built-in snooze function supporting repeat use
*Equipped with power failure display function
*900Hz output for alarm tone

FUNCTIONS

*Current time display
*Snooze alarm function
*Sleep timer function (maximum intervals of 59 minutes or 1
hours and 59 minutes)

APPLICATIONS

*Alarm clocks
*Clock radios

SDIP-28

UTC LM8560

MOS IC

UTC

UNISONIC TECHNOLOGIES CO., LTD.

2

QW-R502-005,D

PIN CONFIGURATIONS

15

16

18

19

20

21

22

17

24

25

26

27

28

23

14

13

11

10

9

8

7

12

5

4

3

2

1

6

AM& 10'S HR

ag&de

PM& 10'S HR b

10'S HR c& HR e

HR b&g

HR c&d

HR a&f

MIN b&g

MIN c&d

MIN a&f

Colon Output

VSS

Sleep Output

Alarm OFF

Alarm Display

VDD

Hour Set

Minute Set

Sleep Display

Snooze Input

50/60 Hz Input

50/60 Hz Select

12/24 HR Select

CR Input

Alarm Output

LM8560

10'S MIN a&f

10'S MIN b&g

10'S MIN c&d

10'S MIN e &Min e

ABSOLUTE MAXIMUM RATINGS

(Ta=25

°C, Vss=0V)

PARAMETER SYMBOL

TEST

CONDITIONS

RATING

UNIT

Maximum Supply Voltage

V

DD (max)

-15~

+0.3

V

Input Voltage1

V

IN

1

50/60Hz Input

-15~ +0.3

V

Input Voltage2

V

IN

2

Except 50/60Hz Input

-15~ +0.3

V

Output Voltage

V

OUT

-15~

+0.3 V

Input Clamp Current

l

IN

50/60Hz Input

-0.4 ~+0.4

mA

Allowable Power Dissipation

P

D (max)

Ta=70

°C 700

mW

Operating Temperature

Topr

-30 ~ +70

°C

Storage Temperature

Tstg

-55 ~ +125

°C

ALLOWABLE OPERATING RANGES

(Ta=25

°C, Vss=0V )

PARAMETER SYMBOL

TEST

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply Voltage

V

DD

-14

-7.5

V

Input “H” Level Voltage1

V

IH

1 50/60Hz

Input

-1

V

Input “L” Level Voltage1

V

IL

1 50/60Hz

Input

V

DD

+2 V

Input “H” Level Voltage2

V

IH

2

Except 50/60Hz Input

-1.5

V

Input “L” Level Voltage2

V

IL

2

Except 50/60Hz Input

V

DD

+2 V

50/60Hz Input Pin Input
Voltage

V

AC-IN

Sets

V

SS

as Reference

V

LED

V

UTC LM8560

MOS IC

UTC

UNISONIC TECHNOLOGIES CO., LTD.

3

QW-R502-005,D

ELECTRICAL CHARACTERISTICS

(Ta=25

°C, V

DD

=-12V unless otherwise specified)

PARAMETER SYMBOL

TEST

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Input “H” Level Current 1

I

IH

1

50/60Hz Input, V

IN=

V

SS

10

µA

Input “L” Level Current 1

I

IL

1

50/60Hz Input, V

IN=

V

DD

10

µA

Input “H” Level Current 2

I

IH

2

Input Pins Other Than 50/60Hz Input
V

IN=

V

SS

20

µA

Input “L” Level Current 2

I

IL

2

Input Pins Other Than 50/60Hz Input
V

IN=

V

DD

10

µA

Output “H” Level Current 1

I

OH

1

Alarm Output and Sleep Output
V

OH

=V

SS

-1V

5 mA

Output Leakage Current 1

I

OF

1

Alarm Output and Sleep Output
V

OUT

=V

DD

10

µA

Output “H” Level Current 2

I

OH

2

AM & 10’S HR ag & de (24H mode)
V

OUT

=V

DD-

1V

36 mA

Output Leakage Current 2

I

OF

2

AM & 10’S HR ag & de (24H mode)
V

OUT

=V

DD

20

µA

Output “H” Level Current 3

I

OH

3

Segment Output Other Than Those
V

OUT

=V

SS

-1V

18 mA

Output Leakage Current 3

I

OF

3

Segment Output Other Than Those
Listed Above, V

OUT

=V

DD

20

µA

Power failure detection
Voltage

V

DD

-7.5 -5

V

Consumption Current

I

CC

Output set to off and Pull-down attached
input set open

5 7

mA

Backup Oscillator Stability
Factor

F

S

Standard

Value,900Hz,

V

DD

=-9V±10%-10

-10 10 %

Backup Oscillator
Accuracy

F

A

Standard Value,900Hz, V

DD

=-9V-10 -10 10 %

DESCRIPTION OF OPERATIONS

*50/60Hz Input:

Built-in Shumidt circuit enables noise eliminations 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 continues 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 CR 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 V

SS

level.

*50/60 Selective Input:

When 50/60 selective input is connected to V

SS

, 50Hz use is enabled. 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.

*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 1 shows these display mode selections.

UTC LM8560

MOS IC

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UNISONIC TECHNOLOGIES CO., LTD.

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QW-R502-005,D

Table1 Display Modes

Selective lnput

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

V

SS

NC

Alarm

display

10’s place for

hour, AM/PM

Hour

10’s place for

Minute

Minute

NC V

SS

Sleep

display Clear

Hour

10’s place for

Minute

Minute

V

SS

V

SS

Second

display

Clear

Minute

10”s place for

Second

Second

Note: Activating V

SS

using two inputs simultaneously (alarm select and sleep select), the display mode is switched to

display seconds.

*Time Setting Input:

There are two setting inputs for use with “hour” and “minute”. Time content settings show in Table2 are
possible by activating V

SS

to these pins, A pull-down resistor is built-in.

Table2 Setting contents

Display Mode

Set Input

Functions

Hour

Immediately 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.

Min

Immediately adds 1 to minute digits and then assigns an additional 1, at a
speed of 2 Hz, after each 1/4 to 3/4 second. Seconds are rest.

Time

Both

Operates both as outline above.

Hour (note1)

Second digits are cleared to [00].

Min Time

holds.

Second

(Alarm & Sleep)

Both (note2)

Resets hour and minute digits as [0:00] when operating in 24-H mode or
[12:00] when operating in 12-H mode.

Hour

Immediately 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.

Min

Immediately adds 1 to minute digits and then assigns an additional 1, at a
speed of 2 Hz, after each 1/4 to 3/4 second.

Alarm

Both

Resets hour and minute digits as [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 V

DD

is activated to sleep select

Hour

Sets Sleep counter to [1:59] instantly when V

DD

is activated to sleep select

and hour at the same time.

Min

Sleep counter looses 1 at a speed of 2 Hz.

Sleep

Both

Sleep counter looses 1 at a speed of 2 Hz.

Note:1.Once conditions have been switched to reset or hold, input of other functions is locked until both Hour and

Min input have been separated.

2.When the digital reading for seconds is between 30 and 59 seconds, 1 is added to the digits for minutes as

he digital reading for seconds rests to [00].

*12/24H Select Input :

When this pin set open (V

DD

), a 12-hour display is enabled whereas connecting this pin to V

SS

enables

the 24-hour display. A pull-down resistor is build-in.

*Power Failure Detection Display :

UTC LM8560

MOS IC

UTC

UNISONIC TECHNOLOGIES CO., LTD.

5

QW-R502-005,D

When activated by drop in power supply, all segments which are lit begin to blink and the unit switches
to a power failure detection display. The power failure detection display is canceled by activating V

SS

to

Hours set or Min set.

*Alarm Operation and Alarm Output :

The alarm signal outputs when alarm content matches the content of current time. When not rest by
either snooze input or alarm off input, output continues after 1 hour and 59 minutes. This output signal
consists of 900Hz 2Hz intermittent (50% duty) modulation signals, When the need arises , a filter can be
applied to after the alarm signal to a DC signal.

*Snooze Input :

When the alarm is sounding and instantly activating V

SS

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 1 hours and 59 minutes intervals. A pull-down resistor is built-in
Activating V

SS

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 1 hour and 59
minute. Refer to Table 2 for the proper selection procedure (59 minutes or 1 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 V

SS

to snooze input turns sleep output off. When

sleep output is on.

UTC LM8560

MOS IC

UTC

UNISONIC TECHNOLOGIES CO., LTD.

6

QW-R502-005,D

BLOCK DIAGRAM

22

21

20

18

17

15

27

26

25

28

2

4

7

8

9

10

11

12

13

14

5

6

3

1

16

19

23

24

Output Decoder/Driver

Bl

a

nk&

Fl

as

h

PF

.

DET

AM&10

'S

HR a

g&d

e

PM&1

0'S HR b

10

'S

HR c

&

HRe

HR b

&

g

HR c

&

d

HR

a&f

10

'S M

IN

a&

f

10

'S

M

IN

b

&

g

10

'S

M

IN

c

&

d

1

0'

S

MIN

e&Min e

MIN b

&

g

MIN c&d

MIN a

&

f

12

/2

4

HR

Se

le

ct

50

/60

Hz

Se

le

ct

50

/6

0

Hz

Se

c

Ti

me

Alar

m

Sl

e

ep

Sl

e

ep

Ou

tpu

t

Al

a

rm

Ou

tpu

t

Al

a

rm

OF

F

Co

lo

n

Ou

tp

ut

VSS

VD

D

Sno

oze

In

pu

t

Sl

ee

p Displ

ay

A

lar

m

D

is

pl

ay

H

our

S

e

t

M

inu

te

Se

t

50

/6

0H

z I

nput

C

R

In

pu

t

GATE

TDi

sp &

S.

Samp

le

1Hz

2H

z

1/

2

1/

25

or

1/3

0

50

/60

H

z

GAT

E

CTR

OSC

To

ne

S

tan

db

y D

E

T

In

pu

t

Con

tro

l

S.

S

a

m

p

le

F.S

amp

le

2H

z

Sec

RS

TYHL

D

T.

R

S

T

AL

.RS

T

PWR UP

SEC Disp

T

Di

sp

AL Di

sp

SL

D

is

p

Re

se

t

Co

ntr

ol

Dis

p

la

y

Co

ntro

l

PWR UP

Second

Display

SEC

CT

R

T

ime

HR.CT

R

Time min.CT

R

T

im

e

&S.

Samp

le

T

ime

&F.S

ampl

e

Comp

ara

tor

Al

a

rm MIN

CT

R

Ala

rm HR C

T

R

Al

ar

m

&

F

.Sa

m

pl

e

Ti

m

e

&

F

.S

amp

le

S

lee

p CTR

Co

ntro

l

PW

R

UP

Ou

tp

ut

Con

tro

l

UTC LM8560

MOS IC

UTC

UNISONIC TECHNOLOGIES CO., LTD.

7

QW-R502-005,D

CLOCK-RADIO APPLICATION CIRCUIT (Positive Power Supply)

28

12 H

R

NC

60 H

Z

NC

Ba

ckup

Ba

tter

y

AC

100k

cycle 1

cycle 2

R1

110

k

C1

0.015

μ

f=

900H

z

2.2k

2.2k

4.7k

27k

27k

4.7k

No

te

:

2

1

D

upl

ex

LED

Cathode

C

o

mmo

n

12 Ho

ur Displa

y and 60H

z Circuit

Diagram

+

0.001

μ

U

n

it(resistor:

Ω

, capaci

tor

: F)

15

16

18

19

20

21

22

17

24

25

26

27

23

14

13

11

10

9

8

7

12

5

4

3

2

1

6

VSS

Sleep

O

utput

Al

ar

m

OFF

Alar

m

Di

sp

la

y

VD

D

H

our

Se

t

Minute

Set

Sleep

Di

sp

la

y

Snoo

ze

Inpu

t

50/60

Hz

Input

50/60

Hz

Selec

t

12/24

HR

Selec

t

CR

Input

Alar

m

O

utput

AM&

10'S

HR

ag&de

PM&

10'S

HR b

10'S

HR c

&

HR e

HR

b&g

HR

c&

d

HR

a&f

10'

S

MI

N

a&

f

10'S

MIN

b&g

10

'S

MI

N

c&d

10'S

MIN e

&Min e

MIN

b&g

MIN

c&

d

MIN

a&f

Col

on

O

utput

Thi

s ci

rc

ui

t i

s used as n

o

is

e i

n

ter

fer

e

n

ce str

ipper for

the LW

ban

d.(

B

ackup c

o

ntr

o

l i

s ena

lbl

ed except

for

batter

y b

a

ckup m

ode

LM8560

+

μ

0.47

a

b

c

d

e

f

g

UTC LM8560

MOS IC

UTC

UNISONIC TECHNOLOGIES CO., LTD.

8

QW-R502-005,D

CLOCK APPLICATION CIRCUIT (Negative Power Supply)

15

16

18

19

20

21

22

17

24

25

26

27

28

23

14

13

11

10

9

8

7

12

5

4

3

2

1

6

AM

&

10'

S

HR

PM&

10'S

HR

b

10'

S

HR

c

&

HR e

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

&M

in

e

MIN

b&

g

MIN

c&

d

MIN

a&

f

Colon

O

utput

VS

S

S

leep

O

utput

Alarm

OF

F

Al

ar

m

Dis

play

VD

D

H

our

Se

t

Minute

Se

t

Sleep

Di

sp

la

y

Sn

o

oz

e

Input

50/60

Hz

Input

50/60

Hz

Se

le

ct

1

2/24

HR

Selec

t

CR

In

put

12

H

R

NC

60

H

Z

NC

AC

0.

00

1μ

100

k

cy

cle

1

cyc

le 2

R1

11

0k

f=

900

H

z

C1

No

te

:

2.

1.

W

h

en

Ba

tte

ry

b

ack

up

o

r

ton

e

ou

tp

ut

is

no

t

us

ed

,C

R

in

pu

t i

s co

nn

ec

ed

t

o

V

ss

Ca

th

od

e

C

ommo

n

12

H

ou

r

D

is

pl

ay

an

d 60

Hz

Ci

rc

uit

Di

agra

m

Piezo

Buzz

er

0.

01

5

μ

33

0

μ

+

Al

ar

m

Ou

tp

ut

U

nit

(r

esis

to

r:

Ω

, ca

pa

cito

r

: F)

LM

8560

Du

pl

ex

LE

D

a

b

c

d

e

f

g