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DESCRIPTION
3.5″ TFT lcd screen display
K350C20301 is a 3.5 inch tft LCD module with optional resistive touch screen and capacitive touch screen control with a resolution of 320×480 pixels. This size TFT LCD is in portrait mode with wider viewing angle by POL adjustment, Left: 70 / Right: 70 / Top: 60 / Bottom: 60 degrees (typical). Optional RTP or CTP.
This K350C20301 module has built-in ILI9488 controller IC, supports SPI interface, the power supply voltage (VCC) range is 3.0V to 3.6V, the brightness is 480 nits (typ), and the contrast ratio is 800:1. Ideal for industries such as electrical appliances. The module can operate from -20°C to +70°C; its storage temperature range is -30°C to +80°C.
DRAWING
SPECIFICATIONS
General Specifications
| Item | Contents | Unit |
| Size | 3.5 | inch |
| LCM Dimension | 54.48（W）* 84.71（H） * 2.30(T) | mm |
| LCD Active Area | 48.96* 73.44 | mm |
| Number Of Dots | 320×480 | pixel |
| LCD Type | a-Si TFT | |
| Viewing Direction | 12 o’clock | |
| Driver IC | ILI9488 | |
| Interface Type | SPI | |
| Operating Temperature | -20℃~ 70℃ | |
| Storage Temperature | -30℃~ 80℃ | |
| Backlight Type | 6 LEDs | |
| Brightness | 480 | cd/m2 |
Interface
LCM PIN Definition
| NO. | Symbol | Description |
| 1 | LEDK | BACKLIGHT CATHODE |
| 2 | LEDA | BACKLIGHT ANODE |
| 3 | GND | Ground |
| 4 | RESET | Reset pin |
| 5 | SDA | Serial Data Input |
| 6 | SCL | Serial Clock |
| 7 | RS | Destination register selection. |
| 8 | CS | Chip Select |
| 9 | TE | Frame mark. |
| 10 | GND | Ground |
| 11 | IOVCC | I/O POWER SUPPLY |
| 12 | VCC | POWER SUPPLY |
| 13 | GND | Ground |
| 14 | GND | Ground |
| 15 | GND | Ground |
| 16 | GND | Ground |
| 17 | NC | NC |
| 18 | NC | NC |
| 19 | NC | NC |
| 20 | NC | NC |
DC Characteristics
| Item | Symbol | Min | Typ | Max | Unit |
| TFT gate on voltage | VGH | — | 15 | — | V |
| TFT gate off voltage | VGL | — | -10 | — | V |
| TFT common electrode Voltage | Vcom | — | -1 | — | V |
Typical Operation Conditions
| Item | Symbol | Min. | Typ. | Max. | Unit |
| Analog Supply Voltage | VCI | 2.5 | 2.8 | 3.3 | V |
| Digital Supply Voltage | VDD | 2.5 | 2.8 | 3.3 | V |
| I/O Supply Voltage | IOVCC | 1.65 | 1.8/2.8 | 3.3 | V |
| Input High Voltage | VIH | 0.8*IOVCC | – | IOVCC | V |
| Input Low Voltage | VIL | 0 | – | 0.2*IOVCC | V |
| Output High Voltage | VOH | 0.8*IOVCC | – | – | V |
| Output Low Voltage | VOL | – | – | 0.2*IOVCC | V |
Backlight Circuit Characteristics
| Item | Symbol | Min. | Typ. | Max. | Unit |
| LED Current | IB | — | 90 | 120 | mA |
| LED Voltage | Vf | 2.8 | 3.0 | 3.2 | V |
| CIE | X | 0.265 | 0.295 | 0.325 | |
| Y | 0.26 | 0.29 | 0.32 | ||
| Brightness of LCM | L | — | 480 | — | cd/m2 |
Reliability Test Items
| Test Item | Test Parameters | Key factors for determining test results |
| High temperature storage | 80±3 ℃，48H； | |
| Low temperature storage | -30±3 ℃，48H； | |
| High temperature storage | 70±3 ℃，48H； | Inspection after 2~4hours storage at roomtemperature, |
| Low temperature operation | -20±3 ℃，48H； | the sample shall be free from defects: |
| High temperature/humidity | 60℃±3 ℃,90%±3%RH ，48H； | 1.Air bubble in the LCD; |
| Thermal Shock | ~20℃/0.5h~+70℃/0.5h for a total 24 cycles； |
2.Non-display; |
|
Vibration Test |
Frequency 10Hz~55Hz~10Hz | 3.Glass crack; |
| Amplitude：1.5mm, X，Y，Z | ||
| direction for total 1H； | 4. The electrical | |
| (Packing condition) | ||
|
ESD test |
±4KV, Human Body Mode, | characteristics requirements shall be satisfied. |
| 150pF/330Ω； | ||
| ±8KV, Air Mode, 150pF/330Ω； |
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