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