Round LCD Screen Panel, Round LCD Display Module 128×128 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

Category: COG LCD

Description

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 Display

Drawing

Data source ref: WO128128A2-TFH#

Specifications

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	T_OP	-20	－	+70	℃
Storage Temperature	T_ST	-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	V_DD-V_SS	－	2.7	3.0	3.3	V
Supply Voltage For LCD	V_OP	Ta=-20℃ Ta=25℃ Ta=70℃	－ 13.7 －	－ 14.0 －	－ 14.3 －	V V V
Input High Volt.	V_IH	－	0.7 V_DD	－	V_DD	V
Input Low Volt.	V_IL	－	V_SS	－	0.3 V_DD	V
Output High Volt.	V_OH	－	0.8 V_DD	－	V_DD	V
Output Low Volt.	V_OL	－	V_SS	－	0.2 V_DD	V
Supply Current	I_DD	V_DD=3.0V	－	2.0	－	mA