0.91-inch 128x32 I2C OLED Display Module, I2C Interface - REX012832F

0.91-inch COG 128x32 I2C OLED Display Module (SSD1306 IC)

Model No. REX012832F

The REX012832F is a 0.91-inch graphic OLED I2C display module featuring a 128×32 dot resolution. Built with a COG (Chip-on-Glass) structure, it offers a module dimension of 30.0 × 11.5 × 1.26 mm, integrates the SSD1306 IC, and supports the I2C interface. This I2C OLED display module featuring an I2C interface offers a compact, low-power, and cost-effective communication solution—perfect for designs that require an I2C OLED 128x32 configuration.

Designed for durability, the REX012832F operates from -40°C to +80°C and supports a logic voltage range of 2.8V to 3.3V, with display voltage between 7V and 8V. Typical current consumption is around 7 mA at VCC = 7.25V, making it ideal for low-power applications such as wearables, handheld devices, and compact industrial controls that rely on a 128x32 I2C OLED display.

If you need technical support or product quotes for the REX012832F or other 128x32 I2C OLED display modules, please feel free to contact our sales team!

Data source ref: REX012832FWPP3N00001

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General Specs
Interface Pin Function
Contour Drawing
Absolute Maximum Ratings
Electrical Characteristics

Item	Dimension	Unit
Structure	COG
Size (Diagonal)	0.91	inch
Dot Matrix / Resolution	128 × 32	dots
Module Dimension	30.0 × 11.5 × 1.26	mm
Viewing Area	24.384 × 7.584	mm
Active Area	22.384 × 5.584	mm
Dot / Pixel Size	0.152 × 0.152	mm
Dot / Pixel Pitch	0.175 × 0.175	mm
Emitting Color	OLED, Yellow / White / Sky Blue
Display Mode	Passive Matrix
IC	SSD1306
Interface	I2C
Power Supply	3V
Duty	1/32 duty
Operating Temperature	-40~+80	°C
Storage Temperature	-40~+85	°C
Polarizer Type	Polarizer optional
Type	I2C OLED Graphic Display

REX012832F Pin Function of the OLED I2C Display

Pin No.	Symbol	Function
1	C2P	Positive Terminal of the Flying Inverting CapacitorNegative Terminal of the Flying Boost CapacitorThe charge-pump capacitors are required between the terminals. They must be floated when the converter is not used.
2	C2N
3	C1P
4	C1N
5	VBAT	Power Supply for DC/DC Converter Circuit This is the power supply pin for the internal buffer of the DC/DC voltage converter. It must be connected to external source when the converter is used. It should be connected to VDD when the converter is not used.
6	NC	No connection
7	VSS	Ground of Logic Circuit This is a ground pin. It acts as a reference for the logic pins. It must be connected to external ground.
8	VDD	Power Supply for Logic This is a voltage supply pin. It must be connected to external source.
9	RES#	Power Reset for Controller and Driver This pin is reset signal input. When the pin is low, initialization of the chip is executed.
10	SCL	I2C mode is selected, D2, D1 should be tied together and serve as SDAout, SDAin inapplication and D0 is the serial clock input, SCL.
11	SDA
12	IREF	Current Reference for Brightness Adjustment This pin is segment current reference pin. A resistor should be connected between this pin and VSS. Set the current lower than 12.5μA.
13	VCOMH	Voltage Output High Level for COM Signal This pin is the input pin for the voltage output high level for COM signals. A capacitor should be connected between this pin and VSS.
14	VCC	Power Supply for OEL Panel This is the most positive voltage supply pin of the chip. A stabilization capacitor should be connected between this pin and VSS when the converter is used. It must be connected to external source when the converter is not used.

OLED I2C Display, Monochrome OLED 128x32 I2C Interface - REX012832F Contour Drawing

I2C OLED 128x32 Performance Parameters

Parameter	Symbol	Min	Max	Unit
Supply Voltage for Logic	VDD	0	4.0	V
Supply Voltage for Display	VCC	0	16.0	V
Operating Temperature	TOP	-40	+80	°C
Storage Temperature	TSTG	-40	+85	°C

Item	Symbol	Condition	Min	Typ	Max	Unit
Supply Voltage for Logic	VDD	－	2.8	3.0	3.3	V
Supply Voltage for Display	VCC	－	7	7.25	8	V
Input High Volt	VIH	－	0.8×VDD	－	VDDIO	V
Input Low Volt	VIL	－	0	－	0.2×VDD	V
Output High Volt	VOH	－	0.9×VDD	－	VDDIO	V
Output Low Volt	VOL	－	0	－	0.1×VDD	V
Operating Current for VCC (VCC Supplied Externally)	ICC	Vcc =7.25V	－	7	11	mA