Home Products OLED Module Character OLED Display WEH002002A

Character OLED Display, OLED 20x2

Model No. WEH002002A

►Type: Character
►Structure : COB
►20 characters x 2 Lines
►5V power supply
►1/16 duty cycle
►Interface: 6800, option 8080, SPI
►Compatible to STN LCD WH2002A
►Display Color: White / Yellow / Blue / Green


The WEH002002A is a COB-structured OLED display module featuring a 20x2 character configuration. It boasts a 3.08-inch diagonal module size with an active display area of 77.30 x 11.85 mm and integrates the WS0010-TX all-in-one font IC. Supporting the default interface of 6800, with optional 8080 or SPI interfaces, it operates in a 1/16 duty drive mode. All standard Winstar COB OLED character types are equipped with this all-in-one Fonts controller IC, offering support for ASCII, English, Russian, European, and Japanese character sets via a built-in ROM standard font library.

The WEH002002A shares identical outline dimensions (116.0 x 37.0 mm) and view area size (85.0 x 18.6 mm) as the Winstar LCD WH2002A, utilizing the same pinout configuration. This low-power 20x2 character OLED display is highly recommended for replacing existing STN character displays.

Key features of the OLED include:

  • Faster response time at +25°C (10 microseconds)
  • Unlimited viewing angle up to 175 degrees
  • Thin design with self-emitting technology, eliminating the need for a backlight
  • High brightness and a contrast ratio of up to 10,000:1
  • Wide operating temperature range from -40°C to 80°C
  • Lower power consumption, contributing to reduced CO2 emissions

The module has an integrated PCB board, eliminating the need for customers to develop additional PCBs. Additionally, four screw holes on the PCB board simplify installation for customers. Operating at a logic supply voltage ranging from 4.8V to 5.3V (typically 5.0V), this OLED module ensures reliable performance across a broad temperature spectrum, with storage capabilities from -40°C to +85°C. It also offers multiple emitting colors to cater to diverse customer preferences.

For applications requiring a character OLED display or a 20x2 OLED, the WEH002002A stands out for its efficient performance and versatile functionality.


WEH002002A - Character OLED Display, OLED 20x2

Data source ref: WEH002002AWPP5N00100


Interface Pin Function

Pin No. Symbol Level Description
1 VSS 0V Ground
2 VDD 5.0V Supply Voltage for logic
3 NC No connect
4 RS H/L H: DATA, L: Instruction code
5 R/W H/L H: Read(Module→MPU) L: Write(MPU→Module)
6 E H,H→L Chip enable signal
7 DB0 H/L Data bit 0
8 DB1 H/L Data bit 1
9 DB2 H/L Data bit 2
10 DB3 H/L Data bit 3
11 DB4 H/L Data bit 4
12 DB5 H/L Data bit 5
13 DB6 H/L Data bit 6
14 DB7 H/L Data bit 7
15 NC No connect
16 NC No connect

General Specification

Item Dimension Unit
Number of Characters 20 characters × 2 Lines
Module dimension 116.0 × 37.0 × 9.8 mm
View area 85.0 × 18.6 mm
Active area 77.3 × 11.85 mm
Dot size 0.6 × 0.65 mm
Dot pitch 0.65× 0.70 mm
Character size 3.2 × 5.55 mm
Character pitch 3.9 × 6.3 mm
Panel type OLED , Monochrome
Duty 1/16
IC WS0010-TX
Interface 6800, option 8080, SPI
Size 3.08 inch

Absolute Maximum Ratings

Item Symbol Min Max Unit
Operating Temperature TOP -40 +80 °C
Storage Temperature TST -40 +85 °C
Supply Voltage For Logic VDD-VSS -0.3 5.3 V

Electronical Characteristics

Item Symbol Condition Min Typ Max Unit
Supply Voltage For Logic VDD-VSS 4.8 5.0 5.3 V
Input High Volt. VIH 0.8xVDD VDD V
Input Low Volt. VIL GND 0.2xVDD V
Output High Volt. VOH IOH=-0.5mA 0.8xVDD VDD V
Output Low Volt. VOL IOL=0.5mA GND 0.2xVDD V
50% Check Board Operating Current IDD VDD=5V 35 52 mA

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