REX025664E - Graphic OLED Display Module - Raystar
REX025664E - Graphic OLED Display Module - Raystar
REX025664E - Graphic OLED Display Module - Raystar

3.55-inch 256x64 COG Graphic OLED Display Module (SSD1363 IC)

Model No. REX025664E

The REX025664E is a 3.55-inch 256×64 COG Graphic OLED Display Module powered by the SSD1363 IC. This passive matrix OLED features 4-bit grayscale, delivering clear and detailed visual output. The module supports 6800, 8080, 4-wire SPI, and I²C interfaces, providing developers with flexible integration options across various embedded systems.

Operating over a wide temperature range from -40°C to +80°C, the REX025664E ensures stable performance even in harsh environments. It operates efficiently with a typical supply voltage of 3V (VDD) and a driving voltage of 16V (VCC), consuming only 30 mA (typ.) during normal operation. This display module is ideal for industrial controls, smart home interfaces, and test equipment.

Discover more about the REX025664E or contact our sales team today to find the best OLED display solution for your next project!

Data Source Ref: REX025664EWPP3N00000

Inquiry or Demo Code Datasheet Back Previous Next
  • General Specifications
  • Interface Pin Function
  • Contour Drawing
  • Absolute Maximum Ratings
  • Electrical Characteristics
Item Dimension Unit
Structure COG
Size (Diagonal) 3.55 inch
Dot Matrix / Resolution 256 × 64 dots
Module Dimension 99.20 × 33.50 × 2.01 mm
Viewing Area 89.52 × 23.28 mm
Active Area 87.52 × 21.28 mm
Dot / Pixel Size 0.312 × 0.303 mm
Dot / Pixel Pitch 0.342 × 0.333 mm
Emitting Color OLED, White
Support Grayscale Yes
Display Mode Passive Matrix
Gray Scale 4-bit
IC SSD1363
Interface 6800,8080,4-wire SPI,I2C
Touch Panel No
Power Supply 3V
Duty 1/64 duty
Operating Temperature -40~+80 °C
Storage Temperature -40~+85 °C
Type OLED Graphic Display, Grayscale OLED
Pin No. Symbol Function
1 ESD_GND ESD Ground pin 
2 VSS Ground pin. It must be connected to external ground.
3 VCC Power supply for panel driving voltage. This is also the most positive power voltage supply pin.
A capacitor should be connected between this pin and VSS.
4 VCOMH COM signal deselected voltage level.
A capacitor should be connected between this pin and VSS.
5 VLSS Analog system ground pin. It must be connected to external ground.
6 D7 These pins are bi-directional data bus connecting to the MCU data bus.
Unused pins are recommended to tie LOW.
When serial interface mode is selected, D2, D1 should be tied together as the serial data input: SDIN, and D0 will be the serial clock input: SCLK.
When I2C mode is selected, D2, D1 should be tied together and serve as SDAout, SDAin in application and D0 is the serial clock input, SCL.
7 D6
8 D5
9 D4
10 D3
11 D2
12 D1
13 D0
14 E(RD#) This pin is MCU interface input.
When 6800 interface mode is selected, this pin will be used as the Enable (E) signal.
Read/write operation is initiated when this pin is pulled HIGH and the chip is selected.
When 8080 interface mode is selected, this pin receives the Read (RD#) signal. Read operation is initiated when this pin is pulled LOW and the chip is selected.
When serial or I2C interface is selected, this pin must be connected to VSS.
15 R/W# (WR#) This pin is read / write control input pin connecting to the MCU interface.
When 6800 interface mode is selected, this pin will be used as Read/Write (R/W#) selection input. Read mode will be carried out when this pin is pulled HIGH and write mode when LOW.
When 8080 interface mode is selected, this pin will be the Write (WR#) input. Data write operation is initiated when this pin is pulled LOW and the chip is selected.
When serial or I2C interface is selected, this pin must be connected to VSS.
16 BS1 MCU bus interface selection pins. Select appropriate logic setting as described in the following table. BS2 and BS1 are pin select.
  8080 I2C 6800 4-wire SPI
BS1 1 1 0 0
BS2 1 0 1 0
Note:
(1) 0 is connected to VSS
(2) 1 is connected to VDD
17 BS2
18 D/C# This pin is Data/Command control pin connecting to the MCU.
When the pin is pulled HIGH, the data at D[7:0] will be interpreted as data.
When the pin is pulled LOW, the data at D[7:0] will be transferred to a command register.
In I2C mode, this pin acts as SA0 for slave address selection.
19 CS# This pin is the chip select input connecting to the MCU.
The chip is enabled for MCU communication only when CS# is pulled LOW (active LOW).
20 RES# This pin is reset signal input.
When the pin is pulled LOW, initialization of the chip is executed.
Keep this pin pull HIGH during normal operation.
21 FR This pin outputs RAM write synchronization signal. Proper timing between MCU data writing and frame display timing can be achieved to prevent tearing effect.
It should be kept NC if it is not used.
22 IREF This pin is the segment output current reference pin.
IREF is supplied externally. A resistor should be connected between this pin and VSS to maintain the current around 10uA.
It should be kept floating when internal IREF is chosen by command setting.
23~24 NC This is dummy pin. It should be kept NC.
25 VP This pin is the segment pre-charge voltage reference pin.
A capacitor can be connected between this pin and VSS to improve visual performance. It can also be float per application.
No external power supply is allowed to connect to this pin.
26 VDD Power supply pin for core logic operation. A capacitor should be connected between this pin and VSS.
27 VSL This is segment voltage (output low level) reference pin.
This pin has to be connected with resistor and diode to ground (details depends on application).
28 VLSS Analog system ground pin. It must be connected to external ground.
29 VCC Power supply for panel driving voltage. This is also the most positive power voltage supply pin.
A capacitor should be connected between this pin and VSS.
30 ESD_GND ESD Ground pin 

REX025664E Contour Drawing - Graphic OLED Display Module - Raystar

Parameter Symbol Min Max Unit
Supply Voltage VDD -0.3 4.0 V
Supply Voltage VCC -0.5 19.0 V
Operating Temperature TOP -40 +80 °C
Storage Temperature TSTG -40 +85 °C

DC Electrical Characteristics

Item Symbol Condition Min Typ Max Unit
Low Voltage Power Supply,
Power Supply for I/O pins		 VDD － 1.65 3.0 3.3 V
Operating Voltage VCC － 8.0 16.0 16.5 V
High Level Input VIH － 0.8×VDD － VDD V
Low Level Input VIL － 0 － 0.2×VDD V
High Level Output VOH － 0.9×VDD － VDD V
Low Level Output VOL － 0 － 0.1×VDD V
Display 50% Pixel on ICC VCC =16V － 30 45 mA

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