Home Products COG LCD WO128128A

Circular COG Graphic LCD 128x128

Model No. WO128128A

►COG LCD Display
►Graphic LCD
►128×128 dots
►Built-in controller ST75161
►+3.3V power supply
►1/136 duty cycle
►Interface : 6800/8080/SPI/I2C


WO128128A is a circular monochrome COG graphic LCD module made of 128x128 dot matrix format. This Round STN COG module is built in with ST75161 IC; it supports 8080/6800 parallel, 3-wire and 4-wire serial SPI, I2C interface, Viewing Direction 6 o'clock, 1/136 driving duty, 1/12 BIAS.

The supply voltage for logic of WO128128A is 2.7V to 3.3V, typical value 3V. This module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃. WO128128A is available in FSTN Negative (WO128128A-TDI) and FSTN positive LCD type with white LED backlight (WO128128A-TFH). The USB demo kits are available now; please contact us for USB sampling or quotation.

Demo kit P/N: WWWSTNUSBDEMO-00 for WO128128A-TFH LCD module
Demo kit P/N: WWWSTNUSBDEMO-01 for WO128128A-TDI LCD module


Circular COG Graphic LCD 128x128 - WO128128A- Winstar Display


Interface Pin Function

Pin No. SYMBOL Function
1 VG VG is the power of SEG-drivers.
2 V0 Positive operating voltage of COM-drivers.
3 XV0 Negative operating voltage of COM-drivers.
4 CA1P DC/DC voltage converter
5 CA1N
6 VDD Power supply
7 VSS Ground
8 COMSCN Set scan direction of COM.
9 IF2 These pins select interface operation mode.
10 IF1
11 IF0
12 CSB Chip select input pin.
13 A0 It determines whether the access is related to data or command.
14 ERD Read / Write execution control pin.
15 RWR Read / Write execution control pin.
16 RSTB Hardware reset input pin
17-24 D0-D7 When using 8-bit parallel interface: 8080 or 6800 mode:8 bit bi-directional data bus When using serial interface : 4-line SPI or 3-line SPI mode
D[7:4] : fix to “H” by VDD1. D[3:1] : serial input/output data (SDA).
D[0] : serial input clock (SCL). D1 to D3 must be connected together (SDA)
When using serial interface : I2C interface
D[7] : SA[1], I2C slave address bit. Must be connected to VDD1 or VSS1. D[6] : SA[0], I2C slave address bit. Must be connected to VDD1 or VSS1.
D[5:4] : fix to “H” by VDD1. D[3:2] : SDA_OUT, serial data and acknowledge output for the I2C interface. D[1] : SDA_IN, serial input data D[0] : SCL, serial input clock .
D1 to D3 must be connected together (SDA)
CSB must be fixed to “L” by VSS1.
25 A Anode input for LED backlight.
26 K Cathode input for LED backlight

Mechanical Data

Item Dimension Unit
Number of dots 128 x 128
Module dimension 55.0 x 57.0 x 6.18 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 0.310 x 0.310 mm
Duty 1/136 DUTY,1/12 BIAS
Backlight Type LED
IC ST75161

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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