Home Products COG LCD WO240128B2

Chip on Glass LCD Module 240x128 with PCB

Model No. WO240128B2

►Graphic LCD
►240 x 128 dots
►IC: ST7586S
►3.3V power supply
►1/128 duty cycle
►Interface : Default 6800, Option 8080, SPI-4 Line/SPI-3Line 9bit


The WO240128B2 model is a COG LCD display, an enhanced version of the WO240128B model, featuring a PCB board on the module and a resolution of 240x128 dots. The module has dimensions of 140.0 × 84.0 mm, with an active area size measuring 107.98 × 57.58 mm. It incorporates the ST7586S controller IC, supporting a default 6800 8-bit interface, with optional 8080 8-bit parallel and serial SPI interfaces. The power supply voltage is 3.3V, and it operates with a 1/128 duty and 1/12 bias.

The WO240128B2 offers the advantage of a circuit layout on the PCB board, along with screw holes for easy integration into customers' applications. Additionally, it provides flexibility with three connector pitch sizes: 2.54mm (default), 1.0mm, and 0.5mm. There's also the option for a VDD 5V power supply voltage.

This module is designed to operate within a temperature range of -20℃ to +70℃, with storage temperatures ranging from -30℃ to +80℃. Its versatility makes it suitable for various applications, including home appliances, control systems, industrial devices, and testing equipment.

The WO240128B2 is equipped with FSTN positive Transflective technology and features a white LED backlight. For different LCD types or LED combinations, please feel free to contact us.

If you have any further questions or need additional information, please don't hesitate to ask.


Chip on Glass  LCD Module 240x128 with PCB - WO240128B2
Data source ref: WO240128B2-TFH#


Interface Pin Function

Pin No. Symbol Description
1 VDD Power supply
2 NC No connection
3 VSS Ground
4 CSB Chip select input pin
CSB=“L”: This chip is selected and the MPU interface is active
CSB=“H”: This chip is not selected and the MPU interface is disabled
(D[7:0] are high impedance)
5 RSTB Reset input pin. When RSTB is “L”, internal initialization procedure is executed
6 E Read / Write control input pin.
R/W = “H”: When E is “H”, data bus is in output status.
R/W = “L”: The data are latched at the falling edge of the E signal.
7~14 D7~D0 The bi-directional data bus of the MPU interface. When CSB is “H”, they are high impedance
15 R/W Read / Write control input pin
R/W = “H” : read
R/W = “L” : write
16 A0 The function of this pin is different in parallel and serial interface
In parallel interface: A0 is register selection input
A0 = "H": inputs on data bus are display data
A0 = "L": inputs on data bus are command
17 A LED+
18 K LED-

Mechanical Data

Item Dimension Unit
Number of dots 240 × 128
Module dimension 140.0 × 84.0 × 9.7 mm
View area 114.0 × 64.0 mm
Active area 107.98 × 57.58 mm
Dot size 0.43 × 0.43 mm
Dot pitch 0.45 × 0.45 mm
Drive Method 1/128 Duty,1/12 Bias
Backlight Type LED
IC ST7586S
Interface 6800

Absolute Maximum Ratings

Item Symbol Min Typ Max Unit
Operating Temperature TOP -20 +70
Storage Temperature TST -30 +80
Digital Power Supply Voltage VDDI -0.3 3.6 V
Analog Power supply voltage VDDA -0.3 3.6 V
LCD Power supply voltage V0-XV0 -0.3 19 V
LCD Power supply voltage VG -0.3 5.5 V

Electrical Characteristics

Item Symbol Condition Min Typ Max Unit
Supply Voltage For Logic VDD-VSS 3.0 3.3 3.6 V
Supply Voltage For LCM VOP Ta=-20℃



Input High Volt. VIH 0.7VDD 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 0.2VDD V
Supply Current IDD VDD=3.3V 2.0 4.0 mA

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