Home Products Character LCD WH2004AR

20x4 Character UART LCD Display Module

Model No. WH2004AR

►Character LCD 20x4
►20 Characters x 4 Lines
►5x8 dots includes cursor
►+5V power supply
►1/16 duty cycle
►Interface: UART


The WH2004AR Series is a 20x4 (20 Characters x 4 Lines) LCD display module designed with convenience and versatility in mind. Sharing identical dimensions with the WH2004A series (default 16-pin 6800 interface), including PCB size, LCD dimensions, and frame size, this module offers seamless compatibility with existing setups while providing enhanced functionality.

Measuring at 98x60 mm in module dimensions, the WH2004AR Series features an active area of 70.4x20.8 mm. Equipped with the ST7066U controller IC, this module supports a default UART interface, with the option for SPI/I2C interface via jumper configuration. The WH2004AR series offers a brand new instruction set, eliminating the need to understand the ST7066U LCD Controller commands. Setting up the display is made effortless through the built-in MCU and instruction set, allowing users to focus solely on application layer programming. Additionally, users can easily adjust backlight brightness and LCD contrast using commands listed in the instruction set.

Designed with ease of integration in mind, the module comes with a PCB board and frame, featuring four screw holes on the PCB for secure attachment to various applications. The supply voltage for logic ranges from 4.5V to 5.5V, with typical values at 5V, ensuring stable and reliable performance. Additionally, it boasts an operating temperature range from -20 to +70℃, while the storage temperature spans from -30 to +80℃, making it suitable for deployment in diverse environmental conditions.

Whether for industrial control panels, consumer electronics, or any other application requiring a compact and reliable display solution, the WH2004AR Series offers unparalleled performance and flexibility, making it the ideal choice for your next project.

20x4 UART LCD Display, 20x4 UART LCD Module - WH2004AR


20x4 Character UART LCD Display Module - WH2004AR

Data source: WH2004AR-TFH-JT#


Interface Pin Function

Pin No. Symbol Description
1 RX UART: serial data input (full duplex communication)
2 VSS Ground
3 VDD Supply Voltage
4 TX UART: serial data output
5 CS SPI: chip select
6 SDO SPI: serial data output
7 SCK/SCL SPI: serial clock
I2C: serial clock
8 SDI/SDA SPI: serial data input
I2C: serial data input/output
9 VSS Ground
10 VDD Supply Voltage

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
Controller IC ST7066
Interface UART

Absolute Maximum Ratings

Item Symbol Min Typ Max Unit
Operating Temperature TOP -20 +70
Storage Temperature TST -30 +80
Supply Voltage VSS-0.3 6.0 V
EEPROM Cell Endurance 100K E/W
Input Voltage VSS-0.3 VDD+0.3 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-VO Ta=25℃ 3.75 4.05 4.35 V
Input High Voltage VIH 3.5 5.0 V
Input Low Voltage VIL 0 1.5 V
Supply Current (Module + Backlight) IDD VDD=5.0V 65 mA

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