Description
Product Overview
The 2.42-inch Passive Matrix OLED Display Module is a large-format, high-contrast monochrome graphic display designed for embedded systems, industrial control panels, medical equipment, and IoT devices. Powered by the SSD1309 driver IC and featuring a crisp 128×64 pixel resolution, this display delivers bright blue text, detailed graphics, and custom icons on a true black background — all in a spacious 2.42-inch diagonal format.
Why the SSD1309 Controller? Unlike the common SSD1306 controller used on smaller OLEDs, the SSD1309 is specifically designed for larger OLED panels. Key advantages include:
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Higher row drive current for brighter, more uniform illumination across the larger screen area
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External boost regulator to generate the higher voltage needed for 2.42″ panels
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Command compatibility with SSD1306, making library migration simple
The 5-pin I2C interface (GND, VCC, SCL, SDA, RES) requires only two data lines to connect to your microcontroller, preserving valuable I/O pins for other peripherals. A dedicated RES (reset) pin allows hardware initialization for reliable startup.
This module works with 3.3V logic systems (ESP32, ESP8266, STM32, Raspberry Pi). The I2C lines are 5V tolerant, making it safe for direct connection to 5V Arduino boards — provided VCC is supplied with 3.3V.
Key Features
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Large 2.42-Inch Active Area: 55.01 × 27.49mm display area — approximately 6 times larger than 0.96″ OLEDs, providing significantly more screen real estate for dashboards, data visualization, and UI elements
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Blue Monochrome OLED: Bright blue pixels on true black background provide exceptional contrast (10,000:1) and a distinctive, modern appearance
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SSD1309 Driver IC: Advanced controller specifically designed for larger OLED panels, featuring 128 × 64-bit SRAM buffer and 256-step contrast control
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5-Pin I2C Interface: Pins GND, VCC, SCL, SDA, RES — requires only 2 data lines with default address 0x3C, saving GPIO pins
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Dedicated RESET Pin: Hardware reset control for reliable display initialization; requires 10kΩ pull-up to VCC
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Wide Operating Temperature: Rated for -40°C to +85°C, suitable for industrial, outdoor, and automotive applications
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Full Viewing Angle: >160° visibility ensures clear readouts from any angle without contrast shift
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Ultra-Thin COG Construction: Chip-on-Glass design with 2.15mm thickness, ideal for portable devices and space-constrained installations
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Low Power Consumption: Only lit pixels consume power — ideal for battery-powered projects
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Display Type | Passive Matrix OLED (PMOLED) |
| Driver IC | SSD1309 |
| Resolution | 128 × 64 pixels |
| Display Color | Blue |
| Contrast Ratio | 10,000:1 |
| Active Area (W × H) | 55.01 × 27.49 mm |
| Module Dimensions (W × H) | 60.5 × 37.0 × 2.15 mm |
| Pixel Pitch (W × H) | 0.43 × 0.43 mm |
| Pixel Size (W × H) | 0.40 × 0.40 mm |
| Default I2C Address | 0x3C (configurable to 0x3D via DC pin) |
| Logic Supply Voltage (VDD) | 2.8V – 3.3V DC (3.3V typical) |
| Logic I/O Compatibility | 3.3V logic, 5V tolerant for I2C lines |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -40°C to +85°C |
| Interface | I2C (5-pin: GND, VCC, SCL, SDA, RES) |
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