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40 Dot Matrix LCD Segment Driver
Features
* * *
HT1602L
Operating voltage: 2.7V~5.2V LCD driving voltage: 3.0V~5.0V Applicable LCD duty from 1/8 to 1/16
* *
Suitable for various types of LCD panel Bias voltage adjustable from an external source
Applications
* * *
Interface with HT163A Electronic dictionaries Portable computers
* *
Remote controllers Calculators
General Description
The HT1602L is a dot matrix LCD segment driver LSI implemented in CMOS technology. The chip contains 40-bit shift register (two 20-bit shift registers), 40-bit latch (two 20-bit latches), 40-bit level shifter, 40-bit 4-level driver and control circuits. The HT1602L can convert serial data received from an LCD controller parallel data and then send them out as LCD driving waveforms to the LCD panel. The chip is applicable up to 1/16 duty. Furthermore, the bias voltage which determines the LCD driving voltage can be optionally supplied from an external source, thus the chip is suitable for driving various LCD panel. These special features increase the versatility of the chip.
Block Diagram
DO 19 ALT V5 V3 V2 VDD
D I0
2 0 - b it S h ift R e g is te r 1
2 0 - b it L a tc h
Y0 4 0 - b it Level S h ifte r 4 0 - b it 4 Level D r iv e r Y39
LO AD CLK D I2 0
2 0 - b it S h ift R e g is te r 2
2 0 - b it L a tc h
DO 39
VSS
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HT1602L
Pad Assignment
Y14 513 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Y27 15 Y28 16 Y29 17 Y30 18 Y31 19 Y32 20 Y33 21 Y34 22 Y35 23 Y36 24 Y37 25 Y38 26 Y39 27 DO 39 (0 ,0 ) 34 33 32 31 30 29 28 Y13 52 Y12 Y11 Y10 49 Y9 48 Y8 47 Y7 46 Y6 45 Y5 44 Y4 Y3 42 Y2 41 Y1 40 Y0
Y15 Y16 Y17 Y18 Y19 VDD Y20 Y21 Y22 Y23 Y24 Y25 Y26
51
50
43
39 38 37 36 35 ALT LO AD D I0 C LK VDD VSS V2 V3 V5 D O 19 D I2 0
Chip size: 87 74 (mil)
2
* The IC substrate should be connected to VSS 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 -975.00 -975.00 -975.00 -975.00 -975.00 -975.00 -975.00 -975.00 -975.00 -975.00 -975.00 -975.00 -975.00 -845.00 -715.00 -585.00 -455.00 Y 780.00 650.00 520.00 390.00 260.00 130.00 0.00 -130.00 -260.00 -390.00 -520.00 -650.00 -780.00 -780.00 -780.00 -780.00 -780.00 Pad No. 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
2
Unit: mm X 975.00 975.00 942.50 942.50 942.50 975.00 923.50 975.00 975.00 975.00 975.00 975.00 845.00 715.00 585.00 455.00 325.00 Y -713.00 -583.00 -435.50 -305.50 -175.50 -45.50 84.50 239.00 369.00 499.00 629.00 780.00 780.00 780.00 780.00 780.00 780.00
September 1, 2000
HT1602L
Pad No. 18 19 20 21 22 23 24 25 26 27 X -325.00 -195.00 -65.00 65.00 195.00 325.00 455.00 585.00 715.00 845.00 Y -780.00 -780.00 -780.00 -780.00 -780.00 -780.00 -780.00 -780.00 -780.00 -780.00 Pad No. 45 46 47 48 49 50 51 52 53 X 195.00 65.00 -65.00 -195.00 -325.00 -455.00 -585.00 -715.00 -845.00 Y 780.00 780.00 780.00 780.00 780.00 780.00 780.00 780.00 780.00
Pad Description
Pad No. 1~5 6 7~26 27 28 29 30, 31, 32 33 34 35 36 37 38 39~53 Pad Name Y15~Y19 VDD Y20~Y39 DO39 DI20 DO19 V5, V3, V2 VSS VDD CLK DI0 LOAD ALT Y0~Y14 I/O O 3/4 O O I O I 3/4 3/4 I I I I O Positive power supply LCD driver output for segment Shift register output pad for the 40th bit data Data input pad of shift register 2 Shift register output pad for the 20th bit data LCD bias supply voltage Negative power supply, ground Positive power supply Clock pulse input pad for the shift register Data input pad of shift register 1 Latching signal to latch shift register data Alternate signal input pad for LCD driving waveform LCD driver output for segment* Description LCD driver output for segment*
*: For Y0~Y39, one of VDD, V2, V3 or V5 is selected as a display driving source according to the combination of latched data level and ALT signal. Refer to the following table: Latched Data H L ALT H L H L Display data output level V5 VDD V3 V2
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HT1602L
Absolute Maximum Ratings
Supply Voltage..............................-0.3V to 6.0V Input Voltage .................VSS-0.3V to VDD+0.3V Storage Temperature.................-50C to 125C Operating Temperature ..............-20C to 70C
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.
D.C. Characteristics
Symbol VDD IOP IDD fLCD twCLK VIL VIH VLCD Parameter Operating Voltage Operating Current Standby Current Clock Frequency Clock Pulse Width L Input Voltage H Input Voltage LCD Driving Voltage Test Conditions VDD 3/4 5V 5V 5V 5V 5V 5V 5V Conditions 3/4 No load 3/4 3/4 3/4 3/4 3/4 3/4 Min. 2.7 3/4 3/4 3.3 125 3/4 0.7VDD 3.0 Typ. 3/4 100 1 3/4 3/4 3/4 3/4 3/4 Max. 5.2 300 5 3/4 3/4 0.3VDD 3/4 5.0
Ta=25C Unit V mA mA MHz ns V V V
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HT1602L
Timing Diagrams
1/16 duty and 1/5 bias
LO AD ALT 16 1 2 3 16 1 2
LATCH DATA LATCH DATA OF Y0 L V V
a
H L
L 1 fra m e
L
H
L
DD
V
b
Y0
V
c d
V V
EE
V
a
V
b
V
c
V
d
R R D I0 CLK ALT DO 19 D I2 0 VDD
R V2 V3
R
R V5
VR
B r ig h tn e s s A d ju s tm e n t Y0
HT1602L
Y39
V
= VDD = VDD V c= V D D V d= V DD V5= VDD V LCD= V V
a b
-
(1 /5 (2 /5 (3 /5 (4 /5 V
LCD
)V )V )V )V
LCD LCD LCD LCD
DD-
V 5 ; L C D d r iv in g v o lta g e
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HT1602L
Application Circuits
LCD
SEG 1~40
D0
D I0 C LK LO AD ALT VDD VSS
Y0 ~ Y39
D O 39 D O 19
C O M 1~16
D I0 C LK LO AD ALT
Y0 ~ Y39
D O 39 D O 19
D I0 C LK LO AD ALT
Y0 ~ Y39
D O 39 D O 19
HT1602L
V2 V3 V5
D I2 0
HT1602L
VSS V2 V3
D I2 0
HT1602L
VSS V2 V3
D I2 0
VDD
V5
VDD
V5
L C D C o n tr o lle r
C LK L ALT V
DD
GND V1 V2 V3 V4 V5
R C
R C
R R C
R C C
VR
0V
+5V
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September 1, 2000
HT1602L
Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 11F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (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: 852-2-745-8288 Fax: 852-2-742-8657 Holtek Semiconductor (Shanghai) Ltd. 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China Tel: 021-6485-5560 Fax: 021-6485-0313 Holmate Technology Corp. 48531 Warm Springs Boulevard, Suite 413, Fremont, CA 94539 Tel: 510-252-9880 Fax: 510-252-9885 Copyright O 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 present 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.
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September 1, 2000

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