4.92-inch 20x4 Character LCD Display - WH2004L

4.92-inch 20x4 Character LCD Display

Model No. WH2004L

►20x4 LCD Character Displays
►Type: Character
►Structure : COB
►Size: 4.92 inch
►20 characters x 4 Lines
►5x8 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)

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Description

WH2004L is a 4.92-inch 20x4 character LCD display with 20 characters per line across 4 lines. The module uses a COB (Chip on Board) structure and is available with multiple interface configurations. The default configuration uses the ST7066 LCD controller with a 6800 4/8-bit parallel interface, while SPI and I2C versions are available with the RW1063 controller.

The 20x4 LCD module measures 146.0 x 62.5 x 13.6 mm, with a viewing area (VA) of 123.5 x 43.0 mm. The default supply voltage is 5V, with a 3V option also available. When using the 3V supply configuration, the negative voltage supply is limited to 3V. The operating temperature range is -20°C to +70°C, and the storage temperature range is -30°C to +80°C.

WH2004L is available with multiple LCD display modes, including positive gray, positive yellow-green, negative blue, and positive or negative FSTN options. LED backlight colors include yellow-green, blue, green, white, amber, and red. Depending on the module configuration, LED backlight connections are available through PIN1/PIN2, PIN15/PIN16, or dedicated A/K terminals.

Versions using the ST7066 controller are available with multiple character font sets, including English/Japanese, Western European, Eastern European, Scandinavian European, Cyrillic (Russian), and Hebrew/Arabic.

Interface Options

WH2004L: 6800 4/8-bit parallel interface (ST7066 IC)
WH2004L1: SPI interface (RW1063 IC)
WH2004L2: I2C interface (RW1063 IC)

For the standard 18-pin configuration shown below, the 6800 interface provides RS, R/W, E, and DB0–DB7 signal pins, with LED backlight power supplied through PIN15 (A) and PIN16 (K). PIN17 and PIN18 are not connected.

DRAWING

STN LCD Module, STN Display, STN LCD Display, LCD STN 20x4 - WH2004L

Data source ref:WH2004L-TFH-CT#

SPECIFICATIONS

Mechanical Data

Item	Dimension	Unit
Number of Characters	20 Characters x 4 Lines	－
Module dimension	146.0 x 62.5 x 13.6 (MAX)	mm
View area	123.5 x 43.0	mm
Active area	118.84 x 38.47	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℃	－ 4.1 3.5	－ 4.2 －	5.4 4.3 －	V V V
Input High Volt.	VIH	－	0.7VDD	－	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	0.4	2.0	4.0	mA

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	－	LED +
16	K	－	LED -
17	NC	－	No connection
18	NC	－	No connection

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