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1.09" Round TFT LCD Module | 240×240 GC9A01 SPI Display for Wearables & IoT

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1.09" Round TFT LCD Module | 240×240 GC9A01 SPI Display for Wearables & IoT

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Brand Name : SAEF

Model Number : SFTO109JY-7337AN

Certification : ISO9001 / ISO14000

Place of Origin : ShenZhen / China

MOQ : 3 units (Negotiable for sample orders)

Price : $1.60USD - $1.90USD / unit (FOB Shenzhen, based on order quantity)

Payment Terms : T/T, PayPal, T/T 50% deposit, 50% before shipment

Supply Ability : 3,000,000 units / month

Delivery Time : 1–5 weeks after order confirmation

Packaging Details : Export-ready carton box

Display Size : 1.09-inch Circular

Resolution : 240×240 Pixels

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

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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

1.09" Round TFT LCD Module | 240×240 GC9A01 SPI Display for Wearables & IoT

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

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

Current Consumption

 IDD - TBD - mA Normal mode

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

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1.09" Round TFT LCD Module | 240×240 GC9A01 SPI Display for Wearables & IoT1.09" Round TFT LCD Module | 240×240 GC9A01 SPI Display for Wearables & IoT


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