128x128 Square LCD Display Module - RX128128B
128x128 Square LCD Display Module - RX128128B
128x128 Square LCD Display Module - RX128128B
128x128 Square LCD Display Module - RX128128B
128x128 Square LCD Display Module - RX128128B

128x128 Square LCD Display Module

Model No. RX128128B

RX128128B is a square 128x128 COG graphic LCD display module. Module size is 68.0x72.0 mm; viewing area is 62.0x62.0 mm. This series has built-in IC ST75161, supporting 6800, 8080, 3/4-Line SPI and I2C interface. Logic voltage of this LCD module ranges from 3.0V-3.6V; typical value is 3.3V, driving method is 1/128 duty. The module works within temperature from -20°C to+ 70°C. Storage temperature range is from -30°C to+ 80°C.

Data source ref: RX128128B-FHW

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  • General Specs
  • Interface Pin Function
  • Contour Drawing
  • Absolute Maximum Ratings
  • Electrical Characteristics
Item Dimension Unit
Structure COG
Size (Diagonal) 3.06 inch
Dot Matrix / Resolution 128 × 128 dots
Module Dimension 68.0 × 72.0 × 6.5 mm
Viewing Area 62.0 × 62.0 mm
Active Area 55.01 × 55.01 mm
Dot / Pixel Size 0.40 × 0.40 mm
Dot / Pixel Pitch 0.43 × 0.43 mm
Backlight Type LED
IC ST75161
Interface 6800,8080, 3/4-Line SPI, I2C
Power Supply 3.3V
Duty 1/128 DUTY,1/12 BIAS
Type Graphic LCD Display Module
Pin No. SYMBOL Function
1 ESD GND ESD Ground
2 VG VG is the power of SEG-drivers.
3 V0 Positive operating voltage of COM-drivers.
4 XV0 Negative operating voltage of COM-drivers.
5 CA1P DC/DC voltage converter
6 CA1N
7 VDD Power supply
8 VSS Ground
9 COMSCN Set scan direction of COM.
10 IF2 These pins select interface operation mode.
11 IF1
12 IF0
13 CSB Chip select input pin.
14 A0 It determines whether the access is related to data or command.
15 ERD Read / Write execution control pin.
16 RWR Read / Write execution control pin.
17-24 RSTB Hardware reset input pin
25 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.
26 A Anode input for LED backlight.
27 K Cathode input for LED backlight
28 ESD GND ESD Ground

128x128 Square LCD Display Module - RX128128B

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 V0-XV0 -0.3 － 19 V
Input voltage VIN -0.3   VDD+0.3 V
Item Symbol Condition Min. Typ. Max. Unit
Supply Voltage For Logic VDD-VSS － 3.0 3.3 3.6 V
Supply Voltage For LCD VOP Ta=-20℃
Ta=25℃
Ta=70℃		 －
14.8
－		 －
15.1
－		 －
15.4
－		 V
V
V
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=3.3V － － 2.5 mA

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