1.3-inch OLED Display Module 128x40 SPI/I2C - REX012840A
1.3-inch OLED Display Module 128x40 SPI/I2C - REX012840A
1.3-inch OLED Display Module 128x40 SPI/I2C - REX012840A
1.3-inch OLED Display Module 128x40 SPI/I2C - REX012840A
1.3-inch OLED Display Module 128x40 SPI/I2C - REX012840A

1.3-inch OLED Display Module 128x40 SPI/I2C (SH1106G-0E IC)

Model No. REX012840A

The REX012840A is a 1.3 inch OLED display module with 128×40 resolution, built using a COG passive matrix structure. With compact 1.3 inch OLED display dimensions of 36.74 × 14.00 × 1.26 mm, this 1.3 OLED module supports monochrome white-on-black display, grayscale, and 256-step dimming. It integrates the SH1106G controller and supports both SPI and I2C interfaces, offering developers flexible system integration for 1.3 inch OLED applications.

Designed for stability and durability, the REX012840A operates across a wide temperature range from -40°C to +80°C. With low power consumption (typically 6.5–9.0 mA at 50% pixel on), this 1.3 OLED display is well-suited for handheld instruments, compact user interfaces, and space-constrained embedded systems requiring precise 1.3 inch OLED display dimensions.

This version is a pure COG type. If you need a COG+PCB version, please refer to REA012840A.

If you need technical support or product quotes for the REX012840A or other 1.3 inch OLED display modules, please feel free to contact our sales team!

Data Source ref: REX012840AWAP3N00000

Inquiry or Demo Code Datasheet Back Previous Next
  • General Specs
  • Interface Pin Function
  • Contour Drawing
  • Absolute Maximum Ratings
  • Electrical Characteristics
Item Dimension Unit
Structure COG
Size (Diagonal) 1.3 inch
Dot Matrix / Resolution 128 × 40 dots
Module Dimension 36.74 × 14.00 × 1.26 mm
Viewing Area 33.40 × 9.23 mm
Active Area 31.852 ×8.66 mm
Dot / Pixel Size 0.229 × 0.197 mm
Dot / Pixel Pitch 0.249 × 0.217 mm
Emitting Color OLED, White
Support Grayscale Yes
Display Mode Passive Matrix
Gray Scale 1 bits
IC SH1106G-0E
Interface 4-wire SPI, I2C
Power Supply 3V
Duty 1/40 duty
Operating Temperature -40~+80 °C
Storage Temperature -40~+85 °C
Polarizer Type Polarizer Optional
Type OLED Graphic Display

REX012840A 1.3-inch OLED Module - Supported Interfaces (SPI / I2C)

Pin No. Symbol I/O Function
1 IXS I SPI/I2C Selection.
2 SCLK/ SCL I Clock.
3 SDIN/ SDA I Data.
4 DC I Data/Command Selection.
5 CSB I Chip Selection.
6 RSTB I Reset.
7 VDD P Logic Power Supply.
8 IREF - Segment Current Reference.
9 VCC P OLED Drive Power Supply.
10 VCOMH O This is a pad for the voltage output high level for common signals. A capacitor should be connected between this pad and VSS.
11 GND P GND.

1.3-inch OLED Display Module 128x40 SPI/I2C - REX012840A Contour Drawing

Operating Temperature & Power Efficiency

Parameter Symbol Min Max Unit
OLED Drive Power Supply Voltage VCC -0.3 14.5 V
Logic Power Supply Voltage VDD -0.3 3.6 V
Signal Input Voltage Vi -0.3 VDD+0.3 V
Operating Temperature TOP -40 +80 °C
Storage Temperature TSTG -40 +85 °C

DC Characteristics

Item Symbol Condition Min Typ Max Unit
OLED Drive Power Supply Voltage VCC － 6.4 12.0 12.5 V
Logic Power Supply Voltage VDD － 1.65 3.3 3.5 V
Input High Volt VIH － 0.8xVDD － VDD V
Input Low Volt VIL － 0 － 0.2xVDD V
Output High Volt VOH － 0.8xVDD － VDD V
Output Low Volt VOL － 0 － 0.2xVDD V
Display 50% Pixel on ICC VCC=12V － 6.5 9.0 mA

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