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—— Andreas Anderssons
—— Evto-WEb Aps. Denemarken
—— Richard Ingram
—— Darkwynd
—— Libby.
—— Michael Helms
—— DEMAC-S.A.
—— J Rau
—— Daniel Champagne
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—— Ryan James
—— Fletcher.
—— Jos
—— Andreas Anderssons
—— Frank
—— Eric M.
—— Joseph Woodcock
—— William Klein
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—— Jordanië L
—— Jeff.
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Introduction
Small displays often carry big responsibilities—especially in wearable and portable devices where power, size, and readability are critical. The SFOS049XZ-7111AN OLED module from Saef Technology Limited addresses these challenges with a high-brightness, low-power design that’s easy to integrate. Here’s how to make the most of it in your next project.
Ideal for Wearables and Medical Devices
With a compact active area of 11.18 × 5.58 mm and a resolution of 64 × 32, this display is perfect for showing essential information like heart rate, steps, or battery status. Its high contrast and wide viewing angle ensure that data remains clear from any perspective.
Power Management Strategies
The module supports two power modes:
External VCC for systems with existing high-voltage rails
Internal DC/DC for battery-operated designs
In sleep mode, power consumption drops to microamps, extending battery life in always-on applications. The internal charge pump also minimizes external parts, saving board space and BOM cost.
I2C Integration Best Practices
The I2C interface simplifies communication with most MCUs. To ensure reliable operation:
Include pull-up resistors on SDA and SCL lines
Follow the recommended power-up sequence: VDD first, then VCC/VBAT, then reset
Use the IREF pin to adjust brightness and optimize power use
Environmental Durability
Rated for operation from -40°C to +85°C, this OLED is suitable for outdoor and industrial environments. Its reliability has been validated through thermal cycling, humidity tests, and extended high-temperature operation.
Optical Performance in Real-World Use
The module’s 2000:1 contrast ratio and 160–180 cd/m² brightness make it readable in direct sunlight or dim indoor settings. The monochrome white-on-black design is easy on the eyes and consumes less power than color displays.
Design Considerations
ESD Protection: Avoid touching pins and FPC traces during assembly
Polarizer Care: Use only recommended cleaning methods (e.g., Scotch Mending Tape)
Light Shielding: The SSD1315 driver is light-sensitive—design enclosures to block direct light
Conclusion
The SFOS049XZ-7111AN is more than just a display—it’s a carefully engineered component ready for demanding applications. Its combination of size, clarity, and efficiency makes it a smart choice for designers and engineers across industries.
For technical support or custom requirements, contact Saef Technology Limited at www.saefdisplay.com.

