Home Products COG LCD WO128128A2

Round LCD Screen Panel, Round LCD Display Module 128x128 with PCB

Model No. WO128128A2

►COG LCD Display
►Graphic LCD
►128×128 dots
►IC: ST75161
►+3V power supply
►1/136 duty cycle
►Interface : Default 8080, Option 6800, SPI-4 Line/SPI-3Line 9bit, I2C


The WO128128A2 model is a COG round LCD display module featuring a PCB board on the module. This round LCD display module is integrated with the ST75161 IC and supports the default 6800 interface, with optional 8080, SPI, and I2C interfaces. The power supply voltage is 3V, with a 1/136 driving duty and 1/12 BIAS.

One notable advantage of the WO128128A2 is its PCB board with a circuit layout and screw holes, facilitating easy fixing onto customers' applications. Additionally, there are three connector pitch size options: 2.54mm (default), 1.0mm, and 0.5mm. The WO128128A2 also offers an optional VDD 5V power supply voltage.

The logic supply voltage for the WO128128A2 is in the range of 2.7V to 3.3V, with a typical value of 3V. This round LCD module can operate within temperatures ranging from -20℃ to +70℃, and its storage temperatures range from -30℃ to +80℃.

The WO128128A2 Round LCD Screen Panel is available in FSTN positive LCD type with white LED backlight. Please feel free to contact us if you require different types of round LCDs or LED combinations.


Round LCD, Round LCD Display Module, Round LCD Panel, Round LCD Screen - WO128128A2

Data source ref: WO128128A2-TFH#


Interface Pin Function

Pin No. SYMBOL Function
1 VDD Power supply
2 NC No Connection
3 VSS Ground
4 CSB Chip select input pin.
5 A0 It determines whether the access is related to data or command.
6 ERD Read / Write execution control pin.
7 RWR Read / Write execution control pin.
8 RSTB Hardware reset input pin
9-16 D0-D7 8 bit bi-directional data bus
17 A Anode input for LED backlight.
18 K Cathode input for LED backlight

Mechanical Data

Item Dimension Unit
Number of dots 128 x 128
Module dimension 60.0 x 62.79 x 8.6 mm
View area 42.0 x 42.0 mm
Active area 44.0 x 44.0 mm
Dot size 0.308 x 0.308 mm
Dot pitch 0.328 x 0.328 mm
Duty 1/136 Duty,1/12 Bias
Backlight Type LED
IC ST75161
Interface 8080

Absolute Maximum Ratings

Item Symbol Min Typ Max Unit
Operating Temperature TOP -20 +70
Storage Temperature TST -30 +80
Power Supply Voltage VDD -0.3 4.0 V
LCD Power supply voltage VLCD -0.3 20 V
LCD Power supply voltage V0-XV0 -0.3 19 V
Input voltage VIN -0.3   VDD+0.3 V

Electrical Characteristics

Item Symbol Condition Min. Typ. Max. Unit
Supply Voltage For Logic VDD-VSS 2.7 3.0 3.3 V
Supply Voltage For LCD VOP Ta=-20℃



Input High Volt. VIH 0.7 VDD VDD V
Input Low Volt. VIL VSS 0.3 VDD V
Output High Volt. VOH 0.8 VDD VDD V
Output Low Volt. VOL VSS 0.2 VDD V
Supply Current IDD VDD=3.0V 2.0 mA

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