LCD Character Module 20×4

Model No. WH2004B

Character LCD 20×4
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)
WH2004B : FFC connector
WH2004F : 7 colors LED option

Category: Character LCD

Description

WH2004B is a 20×4 Character LCD display module which is built in with ST7066 controller IC; its default interface is 6800 4/8-bit parallel, +5V power supply. This type of module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃. WH2004B 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. The WH2004B have the same outline dimension and VA size, AA size as WH2004A but with different pin out. WH2004A is having 16-pin hole on PCB, as to the WH2004B is having a FFC connector.

There are different interface options for WH2004B series, details as below:
►WH2004B : 6800 interface (ST7066 IC)
►WH2004B1 : SPI interface (RW1063 IC)
►WH2004B2 : I2C interface (RW1063 IC)

Drawing

Data source ref:WH2004B-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 4 Lines	－
Module dimension	98.0 x 60.0 x 13.6 (MAX)	mm
View area	77.0 x 25.2	mm
Active area	70.4 x 20.8	mm
Dot size	0.55 x 0.55	mm
Dot pitch	0.60 x 0.60	mm
Character size	2.95 x 4.75	mm
Character pitch	3.55 x 5.35	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 3.5	－ 4.5 －	5.7 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	1.2	1.6	2.0	mA

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