Overview
The JicTech RT028TC5I-S9 is a high‑brightness 2.8‑inch TFT LCD module designed for embedded applications that demand vivid color, wide viewing angles, and a simple serial interface. Built on an IPS panel (normally black), it offers 240×RGB×320 pixel resolution (QVGA), 262K colors, and 80° full viewing angles in all directions. The 4‑wire SPI interface minimizes pin count and simplifies connection to most microcontrollers. With 400 cd/m² typical brightness, 800:1 contrast ratio, and a durable 6.2mm overall thickness, this module is ideal for handheld devices, medical equipment, portable terminals, industrial control panels, and consumer electronics.
Key Features
- 2.8” diagonal IPS panel – 80° viewing angles (left/right/up/down)
- 240×320 resolution – sharp QVGA, 262K colors
- Module size – 50.40 × 69.60 × 6.20 mm (W×H×T)
- Active area – 43.20 × 57.60 mm
- 4‑wire SPI interface – low pin count, easy integration
- High brightness – 400 cd/m² typical (min 300 cd/m²) – excellent indoor readability
- High contrast ratio – 800:1 typical
- Response time – 30ms typical (Tr+Tf)
- Wide color gamut – 60% NTSC typical
- Wide operating temperature – -20℃ to +70℃
- Backlight – 4 white LEDs (parallel), 80mA total current
- Driver IC – ST7789V2-G4-A (well‑supported, mature)
- MTBF – 30,000 hours
- RoHS compliant
Applications
- Portable medical devices (patient monitors, diagnostic tools)
- Industrial HMIs & control panels
- Handheld test & measurement equipment
- Smart home gateways & security panels
- Automotive auxiliary displays
- Consumer electronics (MP4 players, digital photo frames)
Technical Specifications
General Specifications
LCD Size2.8 inchPanel Typea-Si TFT active matrix, IPS (Normally Black)Resolution240 (RGB) × 320 pixelsDisplay ModeIPS / Normally Black / TransmissiveNumber of Colors262K (6‑bit per color)Viewing DirectionAll o’clock (80° typical, CR≥10)Contrast Ratio800 : 1 (typical)Luminance (Brightness)400 cd/m² (typical), 300 cd/m² (min)Module Size (W×H×T)50.40 × 69.60 × 6.20 mmActive Area (W×H)43.20 × 57.60 mmPixel Pitch0.18 × 0.18 mmDriver ICST7789V2-G4-AInterface4‑wire SPIBacklight4 white LEDs (parallel connection)Operating Temperature-20 ~ +70 °CStorage Temperature-30 ~ +80 °C
Absolute Maximum Ratings
| Parameter | Symbol | Min | Max | Unit |
|---|
| Operating temperature | Top | -20 | +70 | °C |
| Storage temperature | Tst | -30 | +80 | °C |
| Humidity | RH | – | 90 (at 60°C) | % |
DC Characteristics (Ta=25°C)
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|
| Logic supply voltage | VDD | 2.8 | 3.3 | 3.6 | V |
| Input current | Idd | – | 12 | – | mA |
| Input High Voltage | VIH | 0.7×VDD | – | VDD | V |
| Input Low Voltage | VIL | VSS | – | 0.3×VDD | V |
Backlight Characteristics (Ta=25°C, constant current)
| Parameter | Symbol | Min | Typ | Max | Unit | Condition |
|---|
| Forward voltage | Vf | 2.8 | 2.9 | 3.0 | V | If=80mA |
| Forward current | If | – | 80 | 100 | mA | Constant current |
Optical Characteristics (Ta=25°C, If=80mA)
| Item | Symbol | Condition | Min | Typ | Max | Unit |
|---|
| Contrast Ratio | CR | Normal angle | – | 800 | – | – |
| Luminance (center) | Lv | Normal angle | 300 | 400 | – | cd/m² |
| Luminance Uniformity | δ WHITE | – | 80 | – | – | % |
| Response Time (Tr+Tf) | – | TC=25°C | – | 30 | 40 | ms |
| Viewing Angle (all directions) | θ | CR≥10 | – | 80 | – | deg |
| White CIE (x,y) | Wx, Wy | Normal angle | 0.24,0.25 | 0.29,0.30 | 0.34,0.35 | – |
| NTSC Ratio | S | – | – | 60% | – | % |
Interface Pin Connection (11‑pin FPC – 4‑wire SPI)
| Pin No. | Symbol | I/O | Description |
|---|
| 1 | GND | P | System ground |
| 2 | CLOCK | I | SPI clock input |
| 3 | GND | P | System ground |
| 4 | SDI | I/O | SPI data in/out |
| 5 | RS | I | Data/Command select (1=data, 0=command) |
| 6 | RESET | I | Reset (active low) |
| 7 | CS | I | Chip select (active low) |
| 8 | GND | P | System ground |
| 9 | VCC | P | Power supply (2.8~3.3V) |
| 10 | LEDA | P | Backlight anode |
| 11 | LEDK | P | Backlight cathode |
Full 11‑pin pinout includes an additional GND on pin 8. Note that pin 10 in the document also lists GND again – refer to the datasheet for exact FPC layout.
Reliability & Quality Assurance
Reliability Test Items (Pass Criteria)
- High temperature storage: 80±2℃, 48H
- Low temperature storage: -30±2℃, 48H
- High temperature operation: 70±2℃, 48H
- Low temperature operation: -20±2℃, 48H
- Thermal shock: -20℃ ↔ 70℃, 30min each, 10 cycles
- ESD test: Air ±6kV / Contact ±4kV, 330Ω/150pF, 5 points each
MTBF: 30,000 hours @ room temperature (25±10℃, 40±20% RH).
Failure judgment: After test, contrast ratio ≥50% of initial value, no display defects, and full electrical/optical functionality.
Quality Assurance (per MIL-STD-105E / GB2828)
- Inspection level: General II, single sampling
- Major defect AQL: 0.65
- Minor defect AQL: 1.5
- Test conditions: 25±5℃, 45±20% RH, 40W fluorescent lamp, 30cm viewing distance, 0°~45°
Packing information: 10pcs per tray × 16 trays per box = 160pcs/carton. Window/LCD tilt angle ≤0.3°.
Handling & Storage Precautions
- Avoid mechanical shock or dropping – glass panel is fragile.
- If LCD fluid leaks, wash skin/clothes immediately with soap and water; do not ingest.
- Use grounded workstations and anti‑static bags for handling and storage.
- Storage: 0~35°C, 40~60% RH, in sealed polyethylene bag, no direct sunlight.
- Hand soldering: 320℃~350℃, max 10 seconds per pad, avoid repeated heating.
- Do not disassemble or modify the module.
Packing Method
Modules are placed in anti‑static trays (10pcs/tray), stacked (16 trays), fixed with foam and cardboard, and sealed in cartons (160pcs/carton). Detailed packing drawings available upon request.
Ordering & Support
The JicTech RT028TC5I-S9 is available for engineering samples and mass production. For a complete datasheet, 2D drawing, or a quotation, please contact our B2B sales team.
Download product manual: FULL SPEC-RT028TC5I-S9
📩 Request a quote or sample – email us today or use the inquiry form below.
