1.5-inch OLED 128x128 Graphic Display Module REX128128A

1.5-inch 128x128 OLED Display Module COG with FPC Options (SSD1327 IC)

Model No. REX128128A

The REX0128128A is a 1.5-inch OLED 128×128 COG Graphic display module designed for compact embedded systems. This 128×128 OLED display features an active area of 26.86 × 26.86 mm, delivers sharp monochrome output with 4-bit grayscale, and is powered by the SSD1327 IC. Supporting multiple interfaces including 6800, 8080, 4-wire SPI, and I2C, this OLED display 128×128 ensures flexible connectivity for diverse applications.

Built with a Chip-on-Glass (COG) structure and offering different types of FPC options, the REX0128128A provides versatility for various design requirements. Operating reliably from -40°C to +80°C, this 128×128 pixel OLED module is ideal for handheld devices, industrial control, and compact designs that demand stable performance.

If you need technical support or product quotes for the REX0128128A or other OLED 1.5 128×128 display modules, please feel free to contact our sales team!

★Support FPC Options

Data Source Ref: REX128128AYAP3N00000

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Datasheet

Back

Item	Dimension	Unit
Structure	COG
Size (Diagonal)	1.5	inch
Dot Matrix / Resolution	128 × 128	dots
Module Dimension	33.8 × 36.5 × 2.05	mm
Viewing Area	28.86 × 28.86	mm
Active Area	26.86 × 26.86	mm
Dot / Pixel Size	0.185 × 0.185	mm
Dot / Pixel Pitch	0.21 × 0.21	mm
Emitting Color	OLED, Yellow / White
Support Grayscale	Yes
Display Mode	Passive Matrix
IC	SSD1327
Interface	8080 / 6800 / 4-wire SPI / I2C
Power Supply	3V
Duty	1/128 duty
Operating Temperature	-40~+80	°C
Storage Temperature	-40~+85	°C
Polarizer Type	Polarizer Optional
FPC Options	Yes
Type	OLED Graphic Display

Connectivity Options for 128x128 OLED Display

Pin No.

Symbol

Function

VSS

Ground pin. It must be connected to external ground.

VCC

Power supply for panel driving voltage. This is also the most positive power voltage supply pin. It is supplied by external high voltage source.

VCOMH

COM signal deselected voltage level.
A capacitor should be connected between this pin and VSS. No external power supply is allowed to connect to this pin.

VCI

Low voltage power supply and power supply for interface logic level. It should match with the MCU interface voltage level and must be connected to external source.
VCI must always set to be equivalent to or higher than VDD.

VDD

Power supply pin for core logic operation.

BS1

MCU bus interface selection pins. Select appropriate logic setting as described in the following table. BS2 and BS1 are pin select.
Bus Interface selection

BS[2:1]	Interface
00	4 line SPI
01	I2C
11	8-bit 8080 parallel
10	8-bit 6800 parallel

BS2

VSS

Ground pin. It must be connected to external ground.

IREF

This pin is the segment output current reference pin

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).

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.

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.

W/R#

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.

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.

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, D0 will be the serial clock input: SCLK; D1 will be the serial data input: SDIN and D2 should be kept NC.
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.

VCC

Power supply for panel driving voltage. This is also the most positive power voltage supply pin. It is supplied by external high voltage source.

VSS

Ground pin.

Dimensions and Layout of 128x128 OLED Module

1.5-inch OLED 128x128 Graphic Display Module REX128128A Contour Drawing - Raystar

Operating Conditions for OLED 128x128 Display

Parameter	Symbol	Min	Max	Unit
Supply Voltage for Operation	VCI	-0.3	4.0	V
Supply Voltage for Logic	VDD	-0.5	2.75	V
Supply Voltage for Display	VCC	-0.5	19.0	V
Operating Temperature	TOP	-40	+80	°C
Storage Temperature	TSTG	-40	+85	°C

DC Electrical Characteristics for 128x128 pixel OLED Module

Item	Symbol	Condition	Min	Typ	Max	Unit
Low Voltage Power Supply Power Supply for I/O Pins	VCI		2.8	3.0	3.3	V
Supply Voltage for Display	VCC	－	14	14.5	15	V
Supply Voltage for Logic	VDD	－	2.4	－	2.6	V
High Level Input	VIH	－	0.8×VCI	－	VCI	V
Low Level Input	VIL	－	0	－	0.2×VCI	V
High Level Output	VOH	－	0.9×VCI	－	VCI	V
Low Level Output	VOL	－	0	－	0.1×VCI	V
50% Check Board Operating Current		VCC =14.5V	－	24	36	mA