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Product Details:
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| Display Size: | 1.09-inch Circular | Resolution: | 240×240 Pixels |
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| Interface: | SPI 4-Wire (SCL/SDA/CS/RS) | Color Depth: | 262K Colors |
| Driver IC: | GC9A01 (Embedded GRAM) | Viewing Angle: | 85° All Directions |
| Surface Luminance: | 400 Cd/m² | Operating Temp.: | -20°C To +70°C |
| Storage Temp.: | -30°C To +80°C | Operating Voltage: | Logic: 1.65-3.3V (IOVCC) |
| Response Time: | 30ms (Tr+Tf Typical) | Compliance: | REACH, RoHS & Halogen Free |
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
Simplified integration with ARM Cortex-M, ESP32, and Raspberry Pi Pico MCUs – leverages embedded GRAM to reduce host processor load.
Critical Specifications for Embedded Design
Compliance & Quality Assurance
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
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General Specification
| Items | Specification | Unit |
| Drive element | a-Si TFT | - |
| LCM outline size | 30.59 (H) x 32.98 (V) | mm |
| Active area | 27.79 (H) x 27.79 (V) | mm |
| Number of pixels | 240(H)X240(V) | pixels |
| Pixel arrangement | RGB Vertical stripe | - |
| Pixel Pitch | 0.1158x 0.1158 | mm |
| Display color | 262k | color |
| Viewing direction | ALL | - |
| Controller / Driver | GC9A01 | - |
| Data interface | SPI 4W | - |
| Backlight | 2 White LED | - |
| Weight | TBD | g |
Absolute Maximum Ratings
| Characteristics | Symbol | Min. | Typ | Max. |
Uni t |
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Supply Voltage |
IOVCC | -0.3 | - | 4.6 | V |
| VCI | -0.3 | - | 4.6 | V | |
| TFT Gate On voltage | VGH | -0.3 | - | 27 | V |
| TFT Gate Off voltage | VGL | -0.3 | - | 27 | V |
| Backlight Forward Current | IF | - | 40 | mA | |
| Operating Temperature | TOPR | -20 | +70 | °C | |
| Storage Temperature | TSTG | -30 | +80 | °C | |
| Humidity | RH | - | 90 | % |
DC Characteristics
| Characteristics |
Sym bol |
Min. | Typ. | Max. | Unit | Note |
| Power Supply Voltage 1 |
IOVC C |
1.65 | 1.8 | 3.3 | V | |
| Power Supply Voltage 2 | VCI | 2.5 | 2.8 | 3.3 | V | |
| Gate Driver High Voltage | VGH | 12 | - | 13 | V | |
| Gate Driver Low Voltage | VGL | -11 | - | -18 | V | |
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Current Consumption |
IDD | - | TBD | - | mA | Normal mode |
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IDD-SL EEP |
TBD | uA | Sleep mode | |||
| Input voltage “L” Level | VIL | GND | - | 0.3IOVCC | V |
IOVCC= 1.65~ 3.3 |
| Input voltage “H” Level | VIH | 0.7IOVCC | - | IOVCC | V | |
| Output voltage “L” Level | VoL | GND | - | 0.2IOVCC | V | IOL= 1mA |
| Output voltage “H” Level | VoH | 0.8IOVCC | - | IOVCC | V | IOH=-1mA |
Backlight Unit Characteristics
| Characteristics | Symbol | Condition | Min. | Type | Max. | Unit |
| Forward Voltage | Vf | IL=40mA | - | 2.8 | 3.0 | V |
| Forward current | IL | - | 40 | - | mA | |
| Luminance | Lv | IL=40mA | - | 450 | -- | cd/m2 |
| LED life time | - | IL=40mA | 20,000 | 25,000 | -- | Hr |
Product Image
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Contact Person: Cologne Ke
Tel: +8613502983321
Fax: 86-755-2370-9419