20×2 Character LCD Modules

Model No. WH2002M

Character LCD 20×2
5×8 dots includes cursor
+5V power supply (Also available for +3V)
Negative voltage option is only for the +3V power supply
1/16 duty cycle
LED can be driven by PIN1, PIN2, PIN15, PIN16 or A and K
Interface: 6800 (ST7066 IC), option SPI/I2C (RW1063 IC)

Category: Character LCD

Description

WH2002M is a 20×2 Character LCD display module which is built in with ST7066 controller IC; its default interface is 6800 4/8-bit parallel. These 20×2 LCD display modules are also available in SPI and I2C interface by using RW1063 controller IC. This type of module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃. WH2002M is available in several different backlight colors including blue, green, yellow-green, amber, red and white LEDs. The LEDs can be driven by pin 1, pin 2, or pin 15 pin 16 or A/K. There are different character fonts/texts available for ST7066 IC including English/Japanese, English/West European, English/Scandinavian European, or English/Cyrillic (Russian) as options.

Drawing

Character LCD 20×2 Datasheet

Data source ref:WH2002M-TFH-ET#

Specifications

Interface Pin Function

Pin No.	Symbol	Level	Description
1	VSS	0V	Ground
2	VDD	5.0V	Supply Voltage for logic
3	VO	(Variable)	Operating voltage for LCD
4	RS	H/L	H: DATA, L: Instruction code
5	R/W	H/L	H: Read L: Write
6	E	H,H→L	Chip enable signal
7	DB0	H/L	Data bus line
8	DB1	H/L	Data bus line
9	DB2	H/L	Data bus line
10	DB3	H/L	Data bus line
11	DB4	H/L	Data bus line
12	DB5	H/L	Data bus line
13	DB6	H/L	Data bus line
14	DB7	H/L	Data bus line
15	A	－	Power supply for B/L +
16	K	－	Power supply for B/L –

Mechanical Data

Item	Dimension	Unit
Number of Characters	20 Characters x 2 Lines	－
Module dimension	146.0 x 43.0 x 13.7 (MAX)	mm
View area	123.0 x 23.0	mm
Active area	118.84 x 18.97	mm
Dot size	0.92 x 1.1	mm
Dot pitch	0.98 x 1.16	mm
Character size	4.84 x 9.22	mm
Character pitch	6.0 x 9.75	mm
Duty	1/16
Backlight Type	LED
IC	ST7066U
Interface	6800

Absolute Maximum Ratings

Item	Symbol	Min	Typ	Max	Unit
Operating Temperature	TOP	-20	－	+70	℃
Storage Temperature	TST	-30	－	+80	℃
Input Voltage	VI	VSS	－	VDD	V
Supply Voltage For Logic	VDD-VSS	-0.3	－	7	V
Supply Voltage For LCD	VDD-Vo	-0.3	－	13	V

Electrical Characteristics

Item	Symbol	Condition	Min	Typ	Max	Unit
Supply Voltage For Logic	VDD-VSS	－	4.5	5.0	5.5	V
Supply Voltage For LCD	VDD-V0	Ta=-20℃ Ta=25℃ Ta=70℃	－ 4.4 3.8	－ 4.5 －	5.5 4.6 －	V V V
Input High Volt.	VIH	－	0.7 VDD	－	VDD	V
Input Low Volt.	VIL	－	Vss	－	0.6	V
Output High Volt.	VOH	－	3.9	－	VDD	V
Output Low Volt.	VOL	－	0	－	0.4	V
Supply Current	IDD	VDD=5.0V	1.0	1.2	1.5	mA

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