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HT1611C Timer with Dialer Interface
Features
* Operating voltage: 1.2V~1.7V * Low operating current: 3mA (typ.) * Dialing number and conversation time display * Conversation timer (59 mins and 59 secs max.) * 8 or 10-digit LCD display driver; 3V,1/2 bias, 1/3 duty
Patent Number: 84545 (R.O.C.) Patent Pending: 08/214, 079 (U.S.A.)
* Real time clock with stopwatch * Built-in dialer interface * 12-hour or 24-hour format * Two-button sequential operation for real time clock
setting
(8-digit hand-held calculator LCD used for 8-digit applications)
* Uses 32768Hz crystal
Applications
* Timers, clocks, watches * LCD display drivers * Telephone display interface * Instrument display
General Description
The HT1611C is a CMOS chip designed for dialer interfaces driving 8 or 10-digit LCDs. Various functions, such as real time clock, dialing number and conversation time display are provided. 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 then the real time is displayed again. When making a phone call, the HT1611C receives the 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 HT1611C can provide a stopwatch function and timer reset/hold functions (for details, refer to the functional description).
Block Diagram
X1 X2 T1 T2 T im e r DI SK S2 S h ift R e g is te r S ta te C o n tro l Segm ent L a tc h & S e le c t C o n tro l C ir c u it S can CKT SEG 30 D ecoder & MUX SEG1 V o lta g e D o u b le r T im e B ase Com m on C ir c u it IN T COM1 COM2 COM3 VA VB VC
T IM E R 1 2 /2 4 S1 HK
RT
EPN
VDD
VSS
Rev. 1.10
1
August 17, 2001
HT1611C
Pad Assignment
SEG27 50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 S1 15 DI 16 17 VSS SK 18 VA 19 VB 20 21 VC VDD 22 COM1 23 COM3 24 SEG1 (0,0) SEG26 49 SEG24 47 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG25 48
46
45
44 43
42
41
40 39
38 37 36 SEG14
SEG13
SEG12
SEG28
SEG29 SEG30 COM2 HK S2 X2 X1
35 34 33 32 31 30 29 28 27 26 25
SEG11
SEG10 SEG9 SEG8
SEG7
SEG6 SEG5 SEG4 SEG3 SEG2
T2 T1
INT TIMER
12/24
Chip size: 122.5 124.9 (mil)2 * The IC substrate should be connected to VDD in the PCB layout artwork.
Pad Coordinates
Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 X -55.73 -55.73 -55.73 -55.73 -55.73 -55.73 -55.73 -55.73 -55.73 -55.73 -55.73 -55.73 -55.73 -52.02 -41.35 -32.86 -25.97 Y 37.50 30.58 23.66 16.77 9.85 2.85 -4.07 -11.00 -17.96 -24.84 -31.73 -38.65 -47.03 -54.72 -54.72 -54.72 -54.72 Pad No. 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 X -16.79 3.90 12.43 18.40 31.48 45.02 55.50 55.46 55.46 55.46 55.46 55.46 55.46 55.46 55.46 55.46 55.46 Y -54.72 -54.72 -54.72 -54.72 -54.72 -54.72 -54.72 -37.96 -30.58 -23.24 -15.89 -8.55 -1.21 6.14 13.48 20.83 28.17 Pad No. 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 X 55.46 55.46 55.46 37.60 30.26 22.91 15.57 8.22 0.88 -6.46 -13.81 -21.15 -28.50 -35.84 -43.18 -50.53
Unit: mil Y 35.51 42.86 50.20 55.02 55.02 55.02 55.02 55.02 55.02 55.02 55.02 55.02 55.02 55.02 55.02 55.02
Rev. 1.10
2
August 17, 2001
HT1611C
Pad Description
Pad Name SEG1~SEG30 COM1~COM3 HK S2 X2 X1 T2 T1 INT TIMER 12/24 S1 DI SK VA VB VC VDD VSS I/O O O I I O I I I O I I I I I O O O 3/4 3/4 Internal Connection CMOS OUT CMOS OUT CMOS IN Pull-high CMOS IN Pull-low OSCILLATOR OSCILLATOR CMOS IN Pull-high CMOS IN Pull-high NMOS OUT CMOS IN Pull-low CMOS IN Pull-low CMOS IN Pull-low CMOS IN Pull-high CMOS IN Pull-high CMOS OUT CMOS OUT CMOS OUT 3/4 3/4 Description LCD segment signal output pads LCD common signal output pads Hook switch detector input Active low Clock adjusting switch Active high 32768Hz crystal oscillator output 32768Hz crystal oscillator input Test pad (connected to VSS for production test) Test pad (connected to VSS for production test) Interrupt output, 2Hz (default) or 16Hz (by mask option) Timer reset and start/hold toggle control input pad 12-hour or 24-hour format option pad, connected to VDD for 12-hour format Clock setting switch Active high Serial data input pad (connected to the dialer) Data should be valid at the falling edge of SK Clock input pad (connected to the dialer) Voltage doubler, connected to the external capacitor Voltage doubler, connected to the external capacitor Voltage doubler, connected to the external capacitor Positive power supply Negative power supply, ground
Approximate internal connection circuit
C M O S IN P u ll- lo w C M O S IN P u ll- h ig h
V
DD
NMOS OUT
CMOS OUT
V
DD
O S C IL L A T O R
X1 10M W X2
12pF
15pF
Rev. 1.10
3
August 17, 2001
HT1611C
Absolute Maximum Ratings
Supply Voltage ...........................................-0.3V to 5V Input Voltage ................................. VSS-0.3 to VDD+0.3 Storage Temperature .......................... -50C to 125C Operating Temperature ......................... -20C to 75C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings 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 reliability.
Electrical Characteristics
Symbol VDD VIL VIH ISTB IDD IOL tA tB tC tDB RHI RLO fOSC Parameter Operating Voltage Input Low Voltage Input High Voltage Standby Current Operating Current Output Sink Current of INT Data Setup Time Data Hold On Time Inter Digit Time Debounce Time (HK, S1, S2, TIMER) Pull-high Resistance (HK, DI, SK) Pull-low Resistance (TIMER, S1, S2, 12/24) System Frequency Test Conditions VDD 3/4 1.2V~1.7V 1.2V~1.7V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V VIN=0V VTIMER=1.5V Crystal=32768Hz Conditions 3/4 3/4 3/4 VHK=Floating (or VDD) No load VO=0.3V 3/4 3/4 3/4 3/4 Min. 1.2 VSS 0.8VDD 3/4 3/4 500 1 2 5 3/4 3/4 3/4 3/4
fOSC=32768Hz, Ta=25C Typ. 1.5 3/4 3/4 0.1 3 1000 3/4 3/4 3/4 31.25 1 5 32768 Max. 1.7 0.2VDD VDD 1 10 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 Unit V V V mA mA mA ms ms ms ms MW MW Hz
Rev. 1.10
4
August 17, 2001
HT1611C
Functional Description
Operational flow chart
Power-on Reset to 00 00 start real time clock
Display real time
Y Reset to 00 00 & start timer
Trig. TIMER key? N HK= "0" ? N
Keep counting
Y
N
Trig. TIMER key ? Y Reset to 00 00 & start timer
N
HK= "0" ? Y
Timer hold Timer keeps counting, displays timer value
Trig. TIMER key ? N N > 5 secs ? Y Reset to 00 00 & start timer
Y
Dialing data input ? N Y Trig. TIMER key ? N
Y
Display dialing number
No data in > 10 s ? N Trig. TIMER key ? N
Y
Keep counting
Y
Y
HK= "0" ? N Timer stops, displays total conversation time Y
N
Trig. TIMER key ? Y Timer hold
HK= "0" ?
N
Y
HK=0 ? Trig. TIMER key ? N N Y HK= "0" ? N N "HK= 1" > 5 secs ? Y
Over 5 secs ? Y Y
N
N
HK=1 > 5 sec? Y
Rev. 1.10
5
August 17, 2001
HT1611C
On-hook & off-hook
Real Time 10 Hour 11 Minute 26 S2 Block A No Data Entry >10 secs Block B S2 S1 25 37 S2 S1 > 5 secs Display Timer 5 sec duration On-hook Off-hook Timer Mode 00 00
00
01
< 5 secs and Off-hook
00
02
Receive Digit(s) 7 On-hook
78
Receive Data
780
Block C
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. In Block C, the dialing data is received and displayed on the LCD from left to right after Off-hook. When the entry interval is over 10 seconds, it resets the timer 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 stopwatch function.
10 11 00 Trig. TIMER LCD display real time 00 00 00 12 Trig. TIMER Timer hold 00 12 Trig. TIMER (within 5 secs) 00 01 00 24
Timer reset and count
Timer reset and count
Trig. TIMER
01
24
No action for over 5 secs
00
12
36
Timer hold
Return to real time clock
In the conversation timer mode, it can reset or hold the timer.
10 11 00 Off-hook LCD display real time (HK=0) 00 00 00 12 Dialing out Show dialing numbers 1234567 Dialing finished (after 10 secs) 00 01 00 24
Timer reset and count
Timer reset and count
Trig. TIMER
00 01
00 24 Trig. TIMER
01
24 On-hook over 5 secs
00
24
36
Timer reset and count
Timer hold
Return to real time clock
Rev. 1.10
6
August 17, 2001
HT1611C
Data & Timing
* For telephone application * For instrument or mC application
The HT1611C is designed to display telephone numbers derived from the HT93XXX series telephone dialers. The corresponding data is illustrated in the following table.
K e y -In B la n k 1
D a ta C o d e b3 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1 1 0 0 1 0 0 1 1 0 0 0 1 1 0 1 0 1 0 0 1 1 0 1 1 0 0 b2 b1 0 1 b0 0
D is p la y B la n k
The HT1611C is also capable of displaying BCD data generated from instrument or a mC system. The corresponding data and timing is shown in the Data latch timing. Before the data is transmitted to the HT1611C, the HK pin should be pulled-low or continuously kept low. The HT1611C 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 HT1611C, the SK pin is set low to avoid switching to the timer mode.
2 3 4 5 6 7 8 9 0 * # F P
* Data latch timing
tB SK tA DI b3 b2 b1 b0 tC D ig it 1 D ig it 2 D ig it N b3 b2 b1 b0 b1 b0
Rev. 1.10
7
August 17, 2001
HT1611C
Application Circuits
For telephone interfacing (with batteries)
8 /1 0 -D ig it L C D
COM 1
COM SEG 3 1
SEG 30
COM 2
50 1 2 3
49
48
47
46
45
44
43
42
41
40
39
38
37 36 35 34
HK S2
5 6 7 8
4
33 32
HT1611C
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
31 30 29 28 27 26 25 24
32768H z T IM E R
1 2 /2 4 S1
DISK
0 .1 m F 0 .1 m F 1 .5 V + 3 .5 8 M H z
8050 330kW
47kW
HFO
DO
CLO C K
X1
X2 VSS
HKS
HFI HDI
H T 9 3 X X X D ia le r
HDI
1N 41483 VDD 100kW 10M W A92
PO
O ff-h o o k O n -h o o k 1 A b r id g e
T ip
270kW
R in g
220kW 8050 100kW
HFI
2 .7 k W 47kW 330mF 10V 33kW A42 5 .1 V VSS 47kW
0 .0 2 m F
* The IC substrate should be connected to VDD in the PCB layout artwork.
Rev. 1.10
8
August 17, 2001
HT1611C
For telephone interfacing (without batteries)
8 /1 0 -D ig it L C D
COM 1
COM SEG 3 1
SEG 30
COM 2
50 1 2 3
49
48
47
46
45
44
43
42
41
40
39
38
37 36 35 34
HK
5 6 7 8
4
33 32
HT1611C
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
31 30 29 28 27 26 25 24
32768H z T IM E R
DISK
0 .1 m F 0 .1 m F
8050 330kW
47kW
3 .5 8 M H z
HFO
DO
CLO CK
X1
X2 VSS
HKS
HFI HDI
H T 9 3 X X X D ia le r
HDI
1N 41486 VDD 100kW 10M W A92 2 .7 k W 33kW A42 5 .1 V VSS
PO
O ff-h o o k O n -h o o k 1 A b r id g e
T ip
20kW HFI 1mF 47kW
R in g
8050
270kW
100kW
* The IC substrate should be connected to VDD in the PCB layout artwork.
220kW
47kW
0 .0 2 m F
330mF 10V
Rev. 1.10
9
August 17, 2001
HT1611C
For instrument or mC use
8 /1 0 -D ig it L C D
COM 1
COM SEG 3 1
SEG 30
COM 2
50 1 2 3
49
48
47
46
45
44
43
42
41
40
39
38
37 36 35 34
HK S2
5 6 7 8
4
33 32
HT1611C
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
31 30 29 28 27 26 25 24
32768H z T IM E R
1 2 /2 4
S1
DISK
0 .1 m F 0 .1 m F + 1 .5 V
R
R1
R
R1 DO
R1 CLO C K
R
5V
HK
VDD
In s tru m e n t o r m C
S y s te m
VSS
* The IC substrate should be connected to VDD in the PCB layout artwork. Note: To drive SK, DI, 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).
Rev. 1.10
10
August 17, 2001
HT1611C
LCD Configuration
For 8-digit application
* Segment electrode side
COM COM SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG COM 1 3 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 2
LCD driving system 1/2 bias, 1/3 duty, 3V
* Common electrode side
SEG
7
89
10 11 12
13 14 15
16 17 18
19 20 21
22 23 24
25 26 27
28 29 30
* LCD connection
COM2
COM1
COM3
Rev. 1.10
11
August 17, 2001
HT1611C
For 10-digit application
* Segment electrode side
COM COM SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG SEG COM 29 30 3 3 4 5 6 1 1 7 8 9 10 13 14 15 21 26 27 2 11 12 16 17 18 19 20 22 23 24 25 28 2
LCD driving system 1/2 bias, 1/3 duty, 3V
* Common electrode side
SEG
1
23
4
56
7
89
10 11 12
13 14 15
16 17 18
19 20 21
22 23 24
25 26 27
28 29 30
* LCD connection
COM1
COM
Rev. 1.10
12
August 17, 2001
HT1611C
Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Sales Office) 11F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Shanghai) Inc. 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor (Hong Kong) Ltd. Block A, 3/F, Tin On Industrial Building, 777-779 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Holmate Semiconductor, Inc. 46712 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright O 2001 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 present a risk to human life due to malfunction or otherwise. Holteks 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.
Rev. 1.10
13
August 17, 2001

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