Holtek Semiconductor Inc HT1330 Datasheet

3 1/2 Digit Timer + Watch

Features

A real time watch

·

A 20-hour adjustable range setting

·

count-down timer

20-minute count-up display cycle time

·

20 hours of count-up time maximum

·

Auto recycle or manual reset the

·

count-down timer by bonding option

Hours and minutes are set independently

·

Real time display in timer mode

·

General Description

The HT1330 is a CMOS fabricated LSI chip de
signed to drive a standard three and 1/2 digit
biplexed LCD for a count-up/down timer in
watch applications. The watch and timer are
based on a 32768Hz quartz crystal oscillator.
The maximum count-down time is 20 hours
with an accuracy of 1 second. The maximum
count-up period is 20 hours, but the LCD will
normally display a maximum period of 19 min­utes and 59 seconds. If the user presses switch
²S2², the total count-up time in hours and min­utes will be displayed. In the count-up/down
mode, the real time can be seen by pressing

HT1330

5-minute/10-minute pre-alarm

·

DC output and piezo output

·

An internal voltage doubler

·

Busy flag output high in timer counting

·

3 1/2 digit LCD display

·

32768Hz crystal oscillator

·

Single 1.5V battery operation

·

48L-pin QFP package

·

-

switch ²S1² and return to the count-up/down
mode by releasing ²S1².

Once the count-down is finished, the timer can
either automatically recycle the preset time or
manually reset the desired time depending on
the selected bonding-pad option. The forecast
alarm generates 4 alarm sounds at 10 minutes
before set time and 8 alarm sounds at 5 minutes
before set time. The HT1330 can be used as a
parking timer, an alarm timer, a pill box timer,
a kitchen timer, a sports timer, etc.

Pin Assignment

BUSY

NC

NCNCNCNCNC

T2

484746 45 44 43 42 41 40 39 3837

1

NC

2

NC

3

NC

4

T1

5

VSS

6

VDD

7

NC

8

OP

BZ

9

BZB

10

S3

11

NC

12

13 1415 161718 19 20 21 222324

NCS2NCS1VEE

H T 1330
48L Q FP

OSC2

OSC1

NC

CAP2NCCAP1NCNCNCCOM 1

COM 2

KD1

36

FE1

35

AG1

34

BC1

33

NC

32

COD3

31

FE2

30

ADG 2

29

BC2

28

FE3

27

AG3

26
25

BC3

1 August 10, 2000

HT1330

Y

2

Pad Assignment Pad Coordinates Unit: mil

S3

S2

S1

VEE

CAP2

CAP1

COM 1

BZB

BZ

1

5

6

7

28

29

8

9

10

11

BC2

FE3

AG3

BC3

Chip size: 119 ´ 112 (mil)

12

VDD

OP

26

27

(0 ,0 )

13

14

COD3

FE2

ADG 2

VSS

25

16 2 17 3 18 4 19

15

FE1

AG1

BC1

2

T1

24

T2

23

22

21

20

COM 2

KD1

BUS

OSC

OSC1

Pad

No.

1

-62.7

2

-62.7

3

-62.7

4

-62.7

5

-62.7

6

-62.7 -18.7

7

-62.7 -58.7

8

-52.7 -58.7

9

-42.7 -58.7

10

-32.7 -58.7

11

-22.7 -58.7

12

-12.7 -58.7

13

-2.7 -58.7
14 7.3
15 17.3

XY

58.7 16 27.3

48.7 17 37.3

30.1 18 47.3

17.2 19 58.3

7.3 20 62.7

-58.7

-58.7

Pad

No.

XY

-58.7

-58.7

-58.7

-58.7

-38.8

21 62.7

-23.7
22 62.7 48.6
23 62.7 58.7
24 43.8 58.7
25 33.8 58.7
26 5.8 58.7
27
28
29

-38.6

-48.6

-4.3

58.7

58.7

58.7

* The IC substrate should be connected to VDD in the PCB layout artwork.

Operational Sequence

Power on

R eal T im e S etting

C ount-dow n
T im e S e ttin g

S3

C ount-dow n Tim er

S1/S 2 or S 1/S2/S 3

Note: S1 for Hour setting

S2 for Minute setting

S3 to Start/Stop the timer

S3>5 seconds into the real time setting mode

S1/S2 to reset the timer to the initial state (0:00)

S1/S2/S3 to return to the real time mode

S3

S3 > 5sec

S1 or S2

R eal T im e

S1/S2

U p/D ow n Tim er

S3

C ount-up Tim er

S1/S 2 or S 1/S2/S 3

S1/S2/S3

S1/S2

2 August 10, 2000

Pin/Pad Description

Pin No. Pad No. Pad Name I/O Description

11 1 S3

14 2 S2

16 3 S1

17 4 VEE

18 5 CAP2

20 6 CAP1

24 7 COM1

25 8 BC3

26 9 AG3

27 10 FE3

28 11 BC2

29 12 ADG2

30 13 FE2

31 14 COD3

33 15 BC1

34 16 AG1

35 17 FE1

36 18 KD1

37 19 COM2

38 20 OSC1

39 21 OSC2

46 22 BUSY

47 23 T2

424T1

5 25 VSS

6 26 VDD

827OP

928BZ

10 29 BZB

I Input to start/stop the timer

I Input for minute setting

I Input for hour setting

Negative voltage supply for LCD display

¾

O For voltage doubling capacitor

O For voltage doubling capacitor

O Common 1 drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Segment drive

O Common 2 drive

I Oscillator input

O Oscillator output

O Timer busy flag, active high

I/O Chip test pin

I/O Fast-test control pin

Negative power supply

¾

Positive power supply

¾

I Option pin for countdown recycle

O Piezo drive

O Piezo drive

HT1330

3 August 10, 2000

Absolute Maximum Rating

HT1330

Supply Voltage.................................-0.3V to 5V

Input Voltage.................V

-0.3V to VDD+0.3V

SS

Storage Temperature.................-50°Cto125°C

Operating Temperature ................-0°Cto70°C

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi

mum Ratings² may cause substantial damage to the device. Functional operation of this de
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.

Electric Characteristics

Ta=25°C

Test Conditions

Symbol Parameter

V

I

DD

V

I

IN

V

Df/f

I

OHA

f

OUT

I

OHF

DD

EE

STR

Supply Voltage 1.5V

Operating Current 1.5V

Display Voltage 1.25~1.7V

Switch Input Current 1.5V

Osc Starting Voltage

Frequency Stability 1.25~1.7V

Alarm Output Drive Current 1.5V

Alarm Output Frequency 1.5V

Busy Flag Output Drive
Current

V

DD

¾

1.5V

Conditions

¾

fosc=32768Hz
No load

¾-1.2 -1.5 -1.7

V

=VDD

IN

Within 3 secs 1.35

¾¾¾

V

=1.35V

OH

¾¾

=1.35V

V

OH

Min. Typ. Max. Unit

1.25 1.50 1.70 V

¾¾

2

mA

V

5

65

¾

¾¾

mA

V

10 PPM

-480 ¾¾mA

4096

¾

Hz

-480 ¾¾mA

-

-

Functional Description

When power is turned on, all the LCD segments
are illuminated to display ²18:88² and the
alarm sounds 2 seconds.

For fast-test, hold the ²TP1² pin high and the
minute digit will be increased every second.

In the count-down mode, when the time has gone
past the set time and the alarm is stopped, the set
time will remain at its current state or be reset to
0:00 depending on the bonding of the ²OPT² pin
to VDD.

In the timer mode, while the timer is counting,
the actual time can be displayed by pressing ²S1².
Once ²S1² is released, the count-down time will

be shown instead.

In the count-up mode, the LCD display is nor
mally in minutes and seconds where the maxi
mum count-up period is 20 minutes. If ²S2² is
pressed, the LCD display will revert to hours
and minutes and the maximum count-up time
will turn out to be 20 hours.

The timer alarm will sound during the
count-down process as listed below:

4 sounds are generated at 10 minutes before
the set time is up.

8 sounds are generated at 5 minutes before the
set time is up.

4 August 10, 2000

-

-

HT1330

Once the set time is reached, the alarm will
sound 60 seconds unless it is stopped by users
(by pressing S3), in which case the preset time
of the timer will remain unchanged or at 0:00
depending on the status of the option pin.

Pressing any one of the inputs (S1 or S2 or S3)

At 0:00 in the timer mode, the alarm will sound
when S1 and S2 are simultaneously depressed.
This is for the alarm test only.

After the device is powered on, the alarm will
sound two seconds and all segments on the LCD

display panel be illuminated.
will stop the alarm during the period for which
the alarm is sounding.

Output Waveform

10 m in utes before set tim e is up

62.5 m s

2 sec1 sec0 sec

5 m in utes before set tim e is up

62.5 m s

0 sec 1 sec 2 sec

Tim e is up

62.5 m s

62.5 m s

62.5 m s

0 sec 1 sec 60 sec

Tim er busy flag output

VDD

VSS

Tim er is counting up or dow n

5 August 10, 2000

Operational FlowChart

HT1330

Note:
S 1 /S 2 : tw o k e y p re s s e d s y n c h
S1/S 2/S 3: three key pressed on tim e
S 3 > 5 s : S 3 k e y is p re s s e d m o re th a n 5 s
S 1 , S 2 , S 3 : th e k e y is p r e s s e d
#: R epresents 2H z flash
*: R e p re s e n ts 1 H z fla s h

YES

C ount_up M ode C ount_dow n M ode

C ount-up

playing

YES

0:01

B

Power on

18:88

A fter 2 secon d

* 0:00

R eal tim e

setting

S3>5s

NO

* 12:59

S3

S1/S2

0:00

S1/S2

S3

Piezo sounds 2 seconds for alarm test
All segm ent on for LC D test

S1 to adjust hour-digit
S2 to adjust m inute-digit

YES

R eal tim e playing m ode

A

NO

Enter the counter M ode

Alarm test

YES

NO

S1 to adjust hout-digit

C ount_dow n

tim e s e ttin g

S3

#19:59

S2 to adjust m inute-digit

C ount_dow n tim e playing

OP

Bonded
option

NO

S2

S 2 to s h o w th e

count num ber

S 1 /S 2 to B S 1 /S 2 /S 3 to A

S1/S2, S1/S2/

S1, S3,

S3

NO

S1 to display

the real tim e

0:00

S 3 fo r s ta rt/

stop counter

YES

NO

Alarm bibi

A ny key to

press

YES

6 August 10, 2000

HT1330

LCD Format

Application Circuits

V

DD

S3

S2

COM 2

F1/E1

K/D1

K

F1

G1

E1

D1

Piezo

1

28

29

A1/G1

A1

C1

COL/D3

B1/C1

F2/E2

A2

F2

B1

COL

G2

E2

COL

27

D2

26

A3/G3

B2/C2

F3/E3

F3

B2

E3

C2

25

D3

24

G3

B3/C3

A3

23

22

COM 1

B3

C3

Busy

A2D2/G 2

0.01mF

S1

0.01mF

5

H T 1330

6

7

8

9

10

11

12

13

11

Biplexed LC D

14

15

16 2 17 3 18 4 19

7 August 10, 2000

21

20

32768H z
X'TAL

20M

W

HT1330

Holtek Semiconductor Inc. (Headquarters)

No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]

Holtek Semiconductor Inc. (Taipei Office)

5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]
Fax: [phone] (International sales hotline)

Holtek Semiconductor (Hong Kong) Ltd.

RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong
Tel: [phone]
Fax: [phone]

Copyright Ó 2000 by HOLTEK SEMICONDUCTOR INC.

The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek
assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are
used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications
will be suitable without further modification, nor recommends the use of its products for application that may pres
ent a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior
notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.

8 August 10, 2000

-