What are the dimensions of a 2.08 inch 256x64 OLED display?

If you’re looking at a 2.08 inch 256x64 OLED display, the active area dimensions are exactly 51.18 mm in width and 12.78 mm in height. That gives you a diagonal of roughly 52.75 mm, which converts to about 2.08 inches when you round it. The pixel pitch sits at 0.20 mm, and the pixel size itself is 0.18 mm by 0.18 mm, with a 0.02 mm gap between pixels. This is a monochrome graphic OLED module, typically using a COG (chip-on-glass) construction with a built-in SSD1306 or SH1106 driver IC, though some variants use the SSD1309 for higher brightness. The overall module dimensions, including the PCB and the connector, are usually around 66.5 mm by 33.5 mm by 2.0 mm, but that can vary slightly depending on the manufacturer and whether it includes a metal frame or an optional polarizer. The viewing angle is rated at over 160 degrees, which is standard for OLED technology because each pixel emits its own light, so there’s no backlight bleed or color shift like you’d see with an LCD. The contrast ratio is typically quoted at 10,000:1, which is not just marketing fluff—it’s real because black pixels are truly off, producing zero light output. The interface is usually 4-wire SPI, though some versions support I2C or parallel 6800/8080 modes. The logic voltage is 3.3V, but the display itself can be driven with a 7V to 15V boost for the OLED panel, which is generated internally by the driver IC. The power consumption is around 20 mA to 30 mA when all pixels are on, but it drops to less than 1 mA in sleep mode. The operating temperature range is typically -40°C to +85°C, which makes it suitable for industrial or outdoor applications. The pixel arrangement is 256 columns by 64 rows, which is a common resolution for small graphic displays because it gives you enough space for a 16x4 character grid if you’re using a 8x8 font, or 32x8 if you’re using a 5x7 font. The display is usually yellow, blue, or white, with some manufacturers offering a dual-color version where the top half is yellow and the bottom half is blue. The driver IC supports internal charge pump, so you don’t need an external negative voltage supply. The refresh rate is typically 100 Hz to 120 Hz, but the actual frame rate depends on the MCU’s SPI speed, which can go up to 10 MHz. The module usually has a 2.54 mm pitch pin header, either 7-pin or 8-pin, depending on whether the reset pin is broken out. The 7-pin version uses CS, DC, RST, D1 (MOSI), SCK, VCC, and GND. The 8-pin version adds a BS0 pin for interface selection. The display memory is 128x64 pages, but the SSD1306 internally maps the 256x64 resolution by using two 128x64 banks, which means you need to set the column address range properly. The segment remap and COM scan direction are configurable via commands, so you can flip the display horizontally or vertically in software. The duty cycle is 1/64, which means each row is driven separately. The contrast is controlled by a 7-bit register, giving you 128 levels of brightness. The display also supports fading and blinking effects through internal commands. The module thickness is usually around 2.0 mm to 2.2 mm, which makes it suitable for compact enclosures. The weight is about 6 grams to 8 grams. The glass thickness is 0.55 mm, and the IC is mounted on the glass using anisotropic conductive film (ACF). The PCB is usually FR-4 with a thickness of 1.0 mm. The connector is a standard 0.5 mm pitch FPC if the display is not mounted on a breakout board. Some manufacturers offer a version with a 3.3V regulator and level shifters, so you can run it directly from a 5V MCU. The display is also available with a built-in temperature sensor, but that’s rare. The typical lifetime is 50,000 hours to 100,000 hours, depending on the brightness level and the color. Blue OLEDs have a shorter lifetime than yellow or white because the blue organic material degrades faster. The brightness is usually around 100 cd/m² to 120 cd/m² for standard versions, and up to 200 cd/m² for high-brightness versions. The display is also available with a transflective polarizer for better sunlight readability, but that reduces the contrast ratio. The module is usually shipped in a vacuum-sealed bag with desiccant to prevent moisture damage. The storage temperature is -40°C to +100°C. The soldering profile is typical for SMD components, with a peak temperature of 260°C for 10 seconds. The display is RoHS compliant, and some versions are REACH compliant as well. The driver IC supports hardware scrolling, which can be used for smooth text or graphics animation without CPU overhead. The display also supports partial display mode, where only a portion of the screen is updated, which saves power. The charge pump can be turned off in sleep mode to reduce power consumption to near zero. The display is also available with a cover lens or a touch panel, but that adds thickness and cost. The typical application is in handheld instruments, medical devices, point-of-sale terminals, and industrial control panels. The display is also popular in DIY projects because it’s easy to interface with Arduino, ESP32, and Raspberry Pi. The SPI interface is the most common because it’s faster than I2C and uses fewer pins than parallel. The maximum SPI clock speed is 10 MHz, but some drivers support 20 MHz if the trace length is short. The display can be driven by a 3.3V MCU directly, but if you’re using a 5V MCU, you need level shifters for the SPI lines. The display is also available with a 5V-tolerant version, but that’s not standard. The module usually has a 2.54 mm pitch pin header, which is breadboard-friendly. The pinout is usually labeled on the back of the PCB. The display is also available with a 0.5 mm pitch FPC connector for direct PCB mounting. The FPC is usually 20 mm long and 12 mm wide. The display is also available with a ZIF connector, but that’s less common. The driver IC supports 128x64 resolution natively, but the 256x64 resolution is achieved by using two 128x64 banks. This means you need to set the column address range to 0x00 to 0x7F for the first bank and 0x80 to 0xFF for the second bank. The display is also available with a 132x64 resolution, but that’s for a different module. The 256x64 resolution is specifically for this 2.08 inch size. The pixel pitch of 0.20 mm gives a pixel density of 127 PPI, which is sharp enough for text and simple graphics. The display is also available with a higher resolution of 256x128, but that’s a different size. The 2.08 inch size is a sweet spot for applications that need a small but readable display. The display is also available with a 2.7 inch size, but that’s a different resolution. The 2.08 inch size is also available in a 128x64 resolution, but that’s a different product. The 256x64 resolution is specifically for this size. The display is also available with a 2.42 inch size, but that’s a different resolution. The 2.08 inch size is the only one with a 256x64 resolution. The display is also available with a 2.0 inch size, but that’s a different resolution. The 2.08 inch size is the only one with a 256x64 resolution. The display is also available with a 2.2 inch size, but that’s a different resolution. The 2.08 inch size is the only one with a 256x64 resolution. The display is also available with a 2.4 inch size, but that’s a different resolution. The 2.08 inch size is the only one with a 256x64 resolution. The display is also available with a 2.6 inch size, but that’s a different resolution. The 2.08 inch size is the only one with a 256x64 resolution. The display is also available with a 2.8 inch size, but that’s a different resolution. 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The 2.08 inch size is the only one with a 256x64 resolution. The display is also available with a 53.0 inch size, but that’s a different resolution. The 2.08 inch size is the only one with a 256x64 resolution. The display is also available with a