Description
4-inch PCAP TFT LCD: Introducing the Square TFT Module 4-inch Edition
SF-TC400B-8951A-N is a high brightness 4-inch square IPS TFT-LCD module with a resolution of 480 x 480 pixels. This module adopts an IPS panel with a wide viewing angle, left: 80/right: 80/top: 80/bottom: 80 degrees (typical). This square TFT LCD supports RGB+SPI interface, with a contrast of 800:1 (typical value) and a high brightness of 420 nits (typical value).
The SF-TC400B-8951A-N module is an integrated driver IC ST7701S on the module, with an interface power supply voltage range of 2.5V to 3.6V, with a typical value of 2.8V. SF-TC400B-8951A-N type can operate at temperatures ranging from -20 ℃ to+70 ℃; Its storage temperature is between -30 ℃ and+80 ℃.
Product Features:
| Product: | 4 Inch TFT Square Display |
| Resolution: | 480*480 |
| Cover Glass Dimension: | Customizable |
| Outline Dimension: | 84.0 X 84.0 X 3.05 mm |
| Interface: | RGB+SPI |
| Touch Screen: | With CTP |
| Viewing Direction: | All Viewing Angle, IPS |
| Active Area: | 70.18×71.86 mm |
| Pin Number: | 40 Pins (Customizable) |
| Surface Luminance: | 420 Cd/m2(nits) Typical |
| Connection: | Plugging (Can Be Customized) |
| LED Lifetime: | 40,000 Hours |
| Certificate: | ISO9001:2015 / ISO1400:2015 |
| Compliance: | Rohs & Reach Compliant |
4″Â PCAP TFT LCD, Square TFT Module 4 inch Drawing
Interface Pin Definition
| NO. | PIN NAME | Description |
| 1 | VLED A | Power for LED backlight anode |
| 2 | VLED K1 | Power for LED backlight cathode |
| 3 | VLED K2 | Power for LED backlight cathode |
| 4 | GND | Power ground |
| 5 | VCC | Power Supply 2.8V Voltage |
| 6 | RESET | – The external reset input – Initializes the chip with a low input. Be sure to execute a power-on reset after supplying power. |
| 7 | NC | No connection |
| 8 | NC | No connection |
| 9 | SDA | SPI Data signal |
| 10 | SCK | SPI Clock signal |
| 11 | CS | SPI Chip Select signal |
| 12 | PCLK | RGB DOT Clock signal |
| 13 | DE | RGB Data Enable signal |
| 14 | VSYNC | RGB frame synchronizing signal |
| 15 | HSYNC | RGB line synchronizing signal |
| 16-33 | DB0-DB17 | RGB data signal |
| 34 | GND | Ground |
| 35 | TP_INT | Touch interrupt |
| 36 | TP_SDA | Touch IIC data signal |
| 37 | TP_SCL | Touch IIC Clock signal |
| 38 | TP_RESET | Touch reset signal |
| 39 | TP_VCI | Touch power supply |
| 40 | GND | Power ground |
Electrical Characteristics
| Item | Symbol | MIN | TYP | MAX | UNIT | Test
Condition |
| Supply Voltage | Vf | 2.8 | 3.3 | 3.6 | V | If=80MA |
| Supply Current | If | – | 50 | mA | – | |
| Reverse Voltage | Vr | – | – | 5 | V | – |
| Input Voltage | Vih | 0.8VDD | VDD | V | – | |
| Vil | 0 | 0.2VDD | V | |||
| Input leakage current | Vil | -.01 | 1 | V | ||
| Uniformity for LCM | – | 80 | – | – | ％ |   If=80MA |
| Backlight Color | White | |||||
| Â | ||||||
Reliability Test
| Item | Condition | Time (hrs) | Assessment |
| High temp. Storage | 80°C | 120 |
No abnormalities in functions and appearance |
| High temp. Operating
|
70°C | 120 | |
| Low temp. Storage | -30°C | 120 | |
| Low temp. Operating | -20°C | 120 | |
| Humidity | 60°C/ 90%RH | 120 | |
| Thermal Shock Temp. Cycle | -20°C ¬ 25°C ®70°C
(0.5 hour ¬ 5 min ® 0.5 hour) |
10cycles | |
4″ PCAP TFT LCD, Square TFT Module 4 inch Product ImageÂ
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