HT1616C

Timer with Dialer Interface

Block Diagram

Rev. 1.10

September 13, 2001

Features

Operating voltage: 1.2V~1.7V

Low operating current: 4mA typ.

Dialing number and conversation time display

Conversation timer (59 mins and 59 secs max.)

12 or 16 digits LCD display driver; 3V, 1/2 bias, 1/3

duty

Real time clock

Stop watch

Built-in dialer interface

12-hour or 24-hour format

Two-button sequential operation for real

time clock setting

Uses 32768Hz crystal

Applications

Timers, clocks and watches

LCD display drivers

Telephone display interface

Instrument display

General Description

The HT1616C is a CMOS chip designed for dialer inter-
faces driving 12 or 16-digit LCDs. Various functions,
such as real time clock, dialing number and conversa-
tion time display are provided.
For HT1616C the real time is displayed by default.
When answering a telephone call, the timer is activated
to tell users how long the conversation has taken. After
the telephone is hung up, the total conversation time is

shown for about 5 seconds and the real time is dis-
played again. When making a phone call, the HT1616C
receives dialing data from the dialer and displays the
phone number from left to right on the LCD. However, if
there is no dialing action within 10 seconds, it restarts
the timer again. By adding a TIMER key, the IC can pro-
vide stopwatch and timer reset/hold functions. Refer to
the functional description for details.

Patent Number: 84545 (R.O.C.)

Patent Pending: 08/214, 079 (U.S.A.)

I N T

R E S

D I

S K

H K

S 2

X 1
X 2

T 2

S E G 1

S E G 4 8

C O M 1
C O M 2
C O M 3

V A
V B
V C

T I M E R

S 1

1 2 / 2 4

T i m e

B a s e

T i m e r

S h i f t

R e g i s t e r

S t a t e

C o n t r o l

C i r c u i t

C o m m o n

C i r c u i t

D e c o d e r

M U X

V o l t a g e

D o u b l e r

S e g m e n t

L a t c h

S e l e c t

S c a n

C K T

T 1

Pad Assignment

Chip size: 140.1 ´ 137.2 (mil)

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

Pad Coordinates

Unit: mil

Pad No.

-64.47

61.01

-4.11

-61.01

64.47

35.53

-64.47

50.26

4.03

-61.01

64.47

41.65

-64.47

44.29

10.00

-61.01

61.60

61.01

-64.47

38.33

16.01

-61.01

55.48

61.01

-64.47

32.36

22.59

-61.01

48.98

61.01

-64.47

26.01

28.63

-61.01

42.86

61.01

-64.47

19.55

34.63

-61.01

36.36

61.01

-64.47

13.50

40.60

-61.01

30.25

61.01

-64.47

-2.03

46.57

-61.01

23.73

61.01

-64.47

-8.72

52.54

-61.01

17.61

61.01

-64.47

-15.99

58.50

-61.01

11.11

61.01

-64.47

-22.68

64.47

-61.01

4.99

61.01

-64.47

-29.99

64.47

-40.20

-1.51

61.01

-64.47

-37.67

64.47

-34.08

-7.63

61.01

-64.47

-43.99

64.47

-27.58

-14.13

61.01

-64.47

-50.37

64.47

-21.46

-20.25

61.01

-58.69

-61.01

64.47

-14.95

-26.75

61.01

-52.65

-61.01

64.47

-8.84

-32.88

61.01

-46.53

-61.01

64.47

-2.33

-39.38

61.01

-40.41

-61.01

64.47

3.79

-45.50

61.01

-33.79

-61.01

64.47

10.29

-52.00

61.01

-27.41

-61.01

64.47

16.41

-58.12

61.01

-18.80

-61.01

64.47

22.91

-12.60

-61.01

64.47

29.03

HT1616C

Rev. 1.10

September 13, 2001

3 6

3 7

3 8

3 9

4 0

4 1

4 2

4 3

4 4

1 0

4 5

1 1

4 6

1 2

4 7

1 3

4 8

1 4

4 9

1 5

5 0

1 6

5 1

1 7

5 2

1 8

5 3

1 9

5 4

2 0

5 5

2 1

5 6

2 2

5 7

2 3

5 8

2 4

5 9

2 5

6 0

2 6

6 1

2 7

6 2

2 8

6 3

2 9

6 4

3 0

6 5

3 1

6 6

3 2

6 7

3 3

6 8

3 4

6 9

3 5

7 0

( 0 , 0 )

S E G 6

S E G 5
S E G 4
S E G 3
S E G 2
S E G 1

C O M 3
C O M 1

H K

S 1

C L R

M O D E

1 2 / 2 4

S 2

D I

C L K

S E G 3 2

S E G 3 1

S E G 3 0

S E G 2 9

S E G 2 8

S E G 2 7

S E G 3 3
S E G 3 4
S E G 3 5
S E G 3 6
S E G 3 7
S E G 3 8
S E G 3 9
S E G 4 0

SEG

2
6

SEG

2
5

SEG

2
4

SEG

2
3

SEG

2
2

SEG

2
1

SEG

2
0

SEG

1
9

SEG

1
8

SEG

1
7

SEG

1
6

SEG

1
5

SEG

1
4

SEG

1
3

SEG

1
2

SEG

1
1

SEG

1
0

SE
G

4
1

SE
G

4
2

SE
G

4
3

SE
G

4
4

SE
G

4
5

SE
G

4
6

SE
G

4
7

SE
G

4
8

CO
M

VD
D

VS
S

RE
S

Pad Description

Pad Name

I/O

Internal

Connection

Description

SEG1~SEG48

CMOS OUT

LCD segment signal output pads

COM1~COM3

CMOS OUT

LCD common signal output pads

CMOS IN

Pull-high

Hook switch detector input

CMOS IN

Pull-low

Clock setting switch

Hour or minute can be selected for S2 adjustment

RES

CMOS IN

Pull-high

System initialization pin, active low
The pull-high resistance is 200kW typ.

MODE

CMOS IN

Pull-low

4 or 5 bits pattern selection pad

VDD: 5 bits pattern

Floating: 4 bits pattern

12/24

CMOS IN

Pull-low

12-hour or 24-hour format option pad

VDD: 12-hour format

Floating: 24-hour format

CMOS IN

Pull-low

Clock adjusting switch

Hour or minute digits can be adjusted depending upon the S1 selection

CMOS IN

Pull-high

Serial data input pad

Data should be valid at the falling edge of SK (connected to the dialer)

CMOS IN

Pull-high

Clock input pad (connected to the dialer), active low

Input data is latched at the falling edge of SK

CMOS IN

Pull-high

Test pad (connected to VSS for production test)

CMOS IN

Pull-high

Test pad (connected to VSS for production test)

OSCILLATOR

32768Hz crystal oscillator input

32768Hz crystal oscillator output

TIMER

CMOS IN

Pull-low

Timer reset-and-start/hold toggle control input pad

INT

NMOS OUT

Interrupt output, 16Hz (default) or 2Hz (by mask option)

CMOS OUT

Voltage doubler, connected to the external capacitor

CMOS OUT

Voltage doubler, connected to the external capacitor

CMOS OUT

Voltage doubler, connected to the external capacitor

VDD

Positive power supply

VSS

Negative power supply, ground

Approximate internal connection circuits

HT1616C

Rev. 1.10

September 13, 2001

1 2 p F

N M O S O U T

C M O S I N

P u l l - l o w

C M O S I N

P u l l - h i g h

O S C I L L A T O R

C M O S O U T

X 1

X 2

1 5 p F

1 0 M W

D D

Absolute Maximum Ratings

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

Storage Temperature ...........................-50°C to 125°C

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

-0.3V to V

+0.3V

Operating Temperature ..........................-20°C to 75°C

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-

ity.

Electrical Characteristics

OSC

=32768Hz, Ta=25°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Conditions

Operating Voltage

1.2

1.5

1.7

Input Low Voltage

0.2V

Input High Voltage

0.8V

STB

Standby Current

1.5V V

=Floating (or V

DD)

0.1

Operating Current

1.5V No load

Output Sink Current of INT

1.5V V

=0.3V

500

1000

Data Setup Time

1.5V

Data Hold On Time

1.5V

Inter Digit Time

1.5V

Input Debounce Time (S1, S2, TIMER) 1.5V

31.25

Pull-high Resistance (HK, DI, SK)

1.5V V

=0V

Pull-low Resistance (TIMER)

1.5V V

TIMER

=1.5V

OSC

System Frequency

1.5V Crystal=32768Hz

32768

HT1616C

Rev. 1.10

September 13, 2001

Functional Description

Operational flow chart

HT1616C

Rev. 1.10

September 13, 2001

H K = 0 ?

" H K = 1 "

> 5 s e c s ?

H K = " 0 " ?

H T 1 6 1 6 / H T 1 6 1 6 C : D i s p l a y r e a l t i m e ,

H T 1 6 1 7 : B L A N K

T r i g .

T I M E R k e y ?

D i s p l a y d i a l i n g n u m b e r

T i m e r s t o p s , d i s p l a y s

t o t a l c o n v e r s a t i o n t i m e

O v e r 5 s e c s ?

R e s e t t o 0 0 0 0

& s t a r t t i m e r

K e e p c o u n t i n g

T i m e r h o l d

> 5 s e c s ?

P o w e r - o n

T i m e r k e e p s c o u n t i n g ,

d i s p l a y s t i m e r v a l u e

R e s e t t o 0 0 0 0

& s t a r t t i m e r

D i a l i n g d a t a i n p u t ?

T r i g . T I M E R k e y ?

H K = " 0 " ?

N o

d a t a i n > 1 0 s ?

T r i g . T I M E R k e y ?

R e s e t t o 0 0 0 0

& s t a r t t i m e r

K e e p c o u n t i n g

T i m e r h o l d

T r i g . T I M E R k e y ?

H K = " 0 " ?

H K = 1

> 5 s e c

R e s e t t o 0 0 0 0

On-hook & Off-hook

Note: Block A shows the switches S1 and S2 that are used for setting and selecting.

Block B illustrates a timer mode when Off-hook; timer resets and starts to count the conversation time.
Block C displays blinking ²¾². After Off-hook, dialing data is received and displayed on the LCD from left to right.

When the entry interval is over 10 seconds, the timer resets and starts to count.

TIMER key function
The TIMER key is used to start/stop the timer (toggle). In real time mode, it can perform a stop- watch function.

In the conversation timer mode, it can reset or hold the timer.

HT1616C

Rev. 1.10

September 13, 2001

B l o c k A

B l o c k B

B l o c k C

R e c e i v e D i g i t ( s )

7 8

7 8 0

O n - h o o k

R e c e i v e D a t a

N o D a t a

E n t r y > 1 0 s e c s

0 0 0 0

T i m e r M o d e

O n - h o o k

0 0 0 1

0 0 0 2

1 1

2 6

1 0 2 5 3 7

S 2

S 1

H o u r

M i n u t e

R e a l T i m e

D i s p l a y T i m e r

5 - s e c d u r a t i o n

> 5 s e c s

< 5 s e c s a n d

O f f - h o o k

T r i g . T I M E R

( w i t h i n 5 s e c s )

T i m e r r e s e t

a n d c o u n t

0 0 0 0

0 1 2 4

T r i g .

T I M E R

0 1 2 4

T i m e r h o l d

N o a c t i o n f o r

o v e r 5 s e c s

T i m e r r e s e t

a n d c o u n t

0 0 0 0

0 0 1 2

L C D d i s p l a y

r e a l t i m e

1 0 1 1 0 0

0 0 1 2 3 6

R e t u r n t o r e a l

t i m e c l o c k

0 0 1 2

T i m e r h o l d

T r i g . T I M E R

D i a l i n g o u t

T i m e r r e s e t

a n d c o u n t

0 0 0 0

0 1 2 4

T r i g .

T I M E R

T i m e r r e s e t

a n d c o u n t

0 0 0 0

0 0 1 2

L C D d i s p l a y

r e a l t i m e

1 0 1 1 0 0

1 2 3 4 5 6 7

D i a l f i n i s h e d

( a f t e r 1 0 s e c s )

0 1 2 4

T i m e r h o l d

0 0 2 4 3 6

H T 1 6 1 6 C

R e t u r n t o r e a l

t i m e c l o c k

O n - h o o k f o r

o v e r 5 s e c s

T r i g . T I M E R

T i m e r r e s e t

a n d c o u n t

0 0 0 0

0 1 2 4

S h o w d i a l i n g

n u m b e r s

( H K = 0 )

O f f - h o o k

HT1616C

Rev. 1.10

September 13, 2001

Data & Timing

For telephone application
The HT1616C is designed to display telephone num-
bers derived from the HT93XXX series telephone di-
aler ICs. When the MODE pad is connected to VSS,
the corresponding data is illustrated in the following
table (MODE=0).

For instrument or mc application
The HT1616C is also capable of displaying BCD data
generated from instrument or a mC system. The corre-
sponding data and timing is shown in the Data Latch Tim-
ing diagram. Before the data is transmitted to the
HT1616C, the HK pin should be pulled-low or continu-
ously kept low. The HT1616C is then ready to receive the
data. At the falling edge of the clock the data is shifted in
to the IC. After all the data is sent to the HT1616C, the SK
pin is set low to avoid switching to the timer mode.
When the MODE pad is connected to ²Low², the data
code and display patterns are shown in the following
table:

K e y - I n

D a t a C o d e

D i s p l a y

b 3

b 2

b 1

b 0

B l a n k

D a t a C o d e

D i s p l a y

b 3

b 2

b 1

b 0

B l a n k

On the other hand, when MODE pad is connected to ²High² the data code and display patterns are shown in the follow-
ing table:
(MODE=1)

(MODE=1)

Data latch timing for 4-bit pattern (MODE=0)

Data latch timing for 5-bit pattern (MODE=1)

HT1616C

Rev. 1.10

September 13, 2001

D a t a C o d e

D i s p l a y

b 3

b 2

b 1

b 0

b 4

D a t a C o d e

D i s p l a y

b 3

b 2

b 1

b 0

B l a n k

b 4

C L K

D I

D i g i t 1

D i g i t 2

D i g i t N

b 3

b 0

b 1

b 2

b 3

b 0

b 1

b 2

b 0

b 1

C L K

D I

D i g i t 1

D i g i t 2

D i g i t N

b 4

b 1

b 2

b 4

b 0

b 1

b 0

b 3

b 0

b 3

b 1

b 2

Application Circuits

For telephone interfacing (with batteries)

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

HT1616C

Rev. 1.10

September 13, 2001

H D I

H K

1 2 / 2 4

1 2 / 1 6 - D i g i t L C D

C O M S E G

C O M

S E G C O M

3 0

S 2

S 1

3 2 7 6 8 H z

2
3
4
5
6

9
1 0
1 1
1 2
1 3
1 4
1 5

1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2 3 3 3 4 3 5

4 9
4 8
4 7
4 6
4 5
4 4
4 3
4 2
4 1
4 0
3 9
3 8
3 7

3 6

7 0

6 9 6 8 6 7 6 6 6 5 6 4 6 3 6 2 6 1 6 0 5 9 5 8 5 7 5 6 5 5 5 4 5 3 5 2 5 1

5 0

H T 1 6 1 6 C

0 . 1 m F

D I

P O

D O

C L O C K

4 7 k W

H T 9 3 X X X D i a l e r

H F O

8 0 5 0

0 . 0 2 m F

H F I

3 3 0 m F

1 0 V

V S S

1 A b r i d g e

R i n g

T i p

A 9 2

H F I

V D D

8 0 5 0

A 4 2

5 . 1 V

1 0 M W

H K S

1 N 4 1 4 8 ´ 3

3 3 0 k W

2 7 0 k W

2 2 0 k W

1 0 0 k W

4 7 k W

2 . 7 k W

3 3 k W

4 7 k W

1 0 0 k W

O f f - h o o k

O n - h o o k

H D I

V S S

X 1

X 2

1 . 5 V

3 . 5 8 M H z

0 . 1 m F

For telephone interfacing (without batteries)

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

HT1616C

Rev. 1.10

September 13, 2001

P O

H K

2
3
4
5
6

7
8

9
1 0
1 1
1 2
1 3
1 4
1 5
1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2 3 3 3 4 3 5

4 9
4 8
4 7
4 6
4 5
4 4
4 3
4 2
4 1
4 0
3 9
3 8
3 7

3 6

7 0

6 9 6 8 6 7 6 6 6 5 6 4 6 3 6 2 6 1 6 0 5 9 5 8 5 7 5 6 5 5 5 4 5 3 5 2 5 1

5 0

H T 1 6 1 6 C

H K S

0 . 1 m F

1 2 / 1 6 - D i g i t L C D

C O M S E G

C O M

S E G C O M

3 0

3 2 7 6 8 H z

D O

C L O C K

4 7 k W

H T 9 3 X X X D i a l e r

H F O

8 0 5 0

0 . 0 2 m F

H F I

3 3 0 m F

1 0 V

V S S

1 A b r i d g e

R i n g

T i p

A 9 2

H F I

V D D

8 0 5 0

A 4 2

5 . 1 V

1 0 M W

1 m F

1 N 4 1 4 8 ´ 6

D I

3 3 0 k W

2 7 0 k W

2 2 0 k W

1 0 0 k W

2 0 k W

4 7 k W

1 0 0 k W

2 . 7 k W

3 3 k W

O f f - h o o k

O n - h o o k

V S S

X 1

X 2

3 . 5 8 M H z

H D I

0 . 1 m F

For instrument or mC use

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

Note:

To drive SK, DI and HK , an open drain NMOS output structure is recommended.
To drive SK, DI and HK with a CMOS output structure, a voltage divider is needed (R=4.3kW, R1=10kW).

HT1616C

Rev. 1.10

September 13, 2001

H K

1 2 / 2 4

1 2 / 1 6 - D i g i t L C D

C O M S E G

C O M

S E G C O M

3 0

S 2

S 1

3 2 7 6 8 H z

2
3
4
5
6

9
1 0
1 1
1 2
1 3
1 4
1 5
1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2 3 3 3 4 3 5

4 9
4 8
4 7
4 6
4 5
4 4
4 3
4 2
4 1
4 0
3 9
3 8
3 7

3 6

7 0

6 9 6 8 6 7 6 6 6 5 6 4 6 3 6 2 6 1 6 0 5 9 5 8 5 7 5 6 5 5 5 4 5 3 5 2 5 1

5 0

H T 1 6 1 6 C

D O

C L O C K

V D D

1 . 5 V

H K

5 V

V S S

I n s t r u m e n t o r m C S y s t e m

R 1

0 . 1 m F

D I

0 . 1 m F

LCD Configurations

For 12-digit application

Segment electrode side

LCD driving system 1/2 bias, 1/3 duty, 3V

Common electrode side

LCD connection

For 16-digit application

Segment electrode side

LCD driving system 1/2 bias, 1/3 duty, 3V

Common electrode side

LCD connection

HT1616C

Rev. 1.10

September 13, 2001

S E G

1 3

S E G

1 4

S E G

1 5

S E G

1 6

C O M

S E G

4 8

S E G

4 7

1 3 1 4 1 5

3 9

4 0 4 1 4 2

3 3

3 4 3 5 3 6

3 7 3 8

2 9 3 0

3 1 3 2

S E G

1 6 1 7 1 8

1 9 2 0 2 1

2 2 2 3 2 4

2 5 2 6 2 7

2 8

4 3 4 4 4 5

4 6 4 7 4 8

C O M 1

C O M 2

C O M 3

C O M 1

C O M 2

C O M 3

7 8 9

2 7 2 8 2 9 3 0

2 1 2 2 2 3 2 4 2 5 2 6

1 5

1 6 1 7 1 8

1 9 2 0

1 0 1 1 1 2 1 3 1 4

S E G

4 5 6

1 2 3

3 1 3 2 3 3 3 4 3 5 3 6

3 7 3 8 3 9 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8

S E G

4 7

S E G

C O M

S E G

C O M

S E G

4 5

S E G

4 6

S E G

4 8

C O M

HT1616C

Rev. 1.10

September 13, 2001

Ó 200

by HOLTEK SEMICONDUCTOR INC.

The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek as-
sumes 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 present a risk to human life
due to malfunction or otherwise. Holtek

¢s products are not authorized for use as critical components in life support devices

or systems. 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.

Holtek Semiconductor Inc. (Headquarters)
No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan
Tel: 886-3-563-1999
Fax: 886-3-563-1189
http://www.holtek.com.tw

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Tel: 021-6485-5560
Fax: 021-6485-0313
http://www.holtek.com.cn

Holtek Semiconductor Inc. (Shenzhen Sales Office)
43F, SEG Plaza, Shen Nan Zhong Road, Shenzhen, China 518031
Tel: 0755-8346

5589

Fax: 0755-8346

5590

ISDN: 0755-8346

5591

Holtek Semiconductor Inc. (Beijing Sales Office)
Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031
Tel: 010-6641

0030, 6641

7751, 6641

7752

Fax: 010-6641

0125

Holmate Semiconductor, Inc. (North America Sales Office)
46712 Fremont Blvd., Fremont, CA 94538
Tel: 510-252-9880
Fax: 510-252-9885
http://www.holmate.com

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: HT1616C

Document Outline

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: HT1616C

Document Outline

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: HT1616C