BG12864B is a monochrome 128x64 graphic LCD display module made using Chip on Board (COB) method and comes with metal frame.

It has a built-in controller ST7920 or equivalent that support (128x64 dots matrix mode or 16x16 dots Big5/GB Chinese mode, or 8x16 dots ASCII mode). BG12864B also provides the option for temperature compensation circuit.

Module dimension of BG12864B is (93x70) mm and viewing area is (72x40) mm.

It supports 5V power supply and provides option of 3V power supply as well.

Mechanical Data

Item	Standard Value	Unit
Module Dimension	93.0 x 70.0	mm
View Area	72.0 x 40.0	mm
Dot Size	0.48 x 0.48	mm
Dot Pitch	0.52 x 0.52	mm

Electrical Characteristics

Item	Symbol	Condition	Typical Value	Unit
Input Voltage	Vdd	Vdd = +5V	5.0	V
Supply Current	Idd	Vdd = +5V	5.0	mA
LCD Driving Voltage	Vo-Vss	25±2°C	4.3	V
LED Forward Voltage	VF	25±2°C	4.1	V
LED Forward Current	IF	25±2°C	300	mA

Pin	Symbol	Function
1	Vss	GND
2	Vdd	+5V (+3V option)
3	V0	Contrast adjustment
4	RS	Register selection signal
5	R/W	Data read/write
6	E	H -> L Enable signal
7~14	DB0~7	Data bus line
15	A	Power supply for B/L (+)
16	K	Power supply for B/L (GND)
17	/RST	Reset LCD module
18	Vee	Positive voltage output +7.5V