Ultra-Compact Round TFT for Wearables & IoT Devices

The SFTO109JY-7337AN is a 1.09-inch circular TFT LCD module engineered for space-constrained applications like smartwatches, medical sensors, and industrial IoT interfaces. With 240×240 resolution and 262K colors driven by the GC9A01 controller, it delivers crisp graphics while consuming ultra-low power (μA-range sleep mode).

Key Technical Advantages

• SPI 4-Wire Interface

Simplified integration with ARM Cortex-M, ESP32, and Raspberry Pi Pico MCUs – leverages embedded GRAM to reduce host processor load.

• Industrial-Grade Reliability

1. Wide Temperature Operation: -20°C to +70°C (no display degradation at extremes).
2. LED Longevity: 40,000-hour backlight lifespan (L70 @ 25°C).
3. ESD Protected: Robust against static discharge in assembly lines.

• Optical Performance Optimized for Circular UI

1. Uniform Brightness: >80% luminance uniformity across 9-point grid.
2. Omnidirectional Viewing: 85° viewing angle from all orientations (12/3/6/9 o’clock).
3. Precise Color Gamut: CIE1931 coordinates: White (0.322x, 0.328y), Red (0.344x, 0.328y), Green (0.618x, 0.328y).

Critical Specifications for Embedded Design

• Power Efficiency: 2.8–3.0V LED forward voltage (40mA max), logic current <1mA active.
• Mechanical Precision: 0.1158mm pixel pitch enables smooth icon rendering.
• FPC Interface: 15-pin connector with RST/INT control pins for low-power state management.

Compliance & Quality Assurance

• Validated under 240hr thermal cycling (-30°C to +80°C) per industrial standards.
• Strict defect control: ≤0.15mm pixel defects allowed (MIL-STD-105E sampling).

For Design Engineers: Download SPI timing diagrams, Arduino initialization code, and optical test reports in the full datasheet. Compatible with STM32 HAL libraries.

Mechanical Outline Dimensions

General Specification

DC Characteristics

Backlight Unit Characteristics

Product Image

Founded in 2007, ShenZhen SAEF Technology Co., Ltd is committed to manufacturing and developing high-quality products for industrial LCD display, including TFT LCD, OLED, monochrome TN/STN/FSTN LCM display modules and system integration solutions. Saef Technology has become a leading enterprise in the field of small and medium size displays, and its continuous innovation has enable it to obtain a number of invention patents in the display field. With more than 14 years of experience, providing competitive products and services through stable product quality and professional pre-sales and after-sales service, SAEF technology has won the recognition of many international big brand companies and established long-term and stable cooperation with them.

Saef Technology is an ISO9001 and environmental ISO 14001 certified manufacturer. We provide 1 to 10 years warranty for all the company’s products. We are not only a display manufacturer but also a solution partner for our customers.

As a leading manufacturer in the display module market, Saef Technology will continue to focus on the research and development of new technologies such as TFT, OLED display, embedded systems integration solutions, and we will continue to provide customers display products with high cost performance.