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| PartNumber | SK-220RD | SK-220RD-AR | SK-220RD-PI |
| Description | Display Development Tools 1.38"intelligent LCD 971-SK-220RD-AR | Display Modules uLCD-220RD-AR w/ uSD-2GB and uUSB-PA5 | Display Modules uLCD-220RD-Pi w/ uSD-2GB and uUSB-PA5 |
| Manufacturer | 4D Systems | 4D Systems Pty Ltd | 4D Systems Pty Ltd |
| Product Category | Display Development Tools | Display Modules - LCD, OLED, Graphic | Display Modules - LCD, OLED, Graphic |
| RoHS | Y | - | - |
| Operating Supply Voltage | 5 V | 5 V | 5 V |
| Interface Type | I2C, SPI, TTL | I2C SPI TTL | I2C SPI TTL |
| Packaging | Bulk | Bulk | Bulk |
| Dimensions | 42.4 mm x 46.9 mm x 14.1 mm | 42.4 mm x 46.9 mm x 14.1 mm | 42.4 mm x 46.9 mm x 14.1 mm |
| Brand | 4D Systems | - | - |
| Viewing Area | 35.1 mm | 35.10mm Diameter | 35.10mm Diameter |
| Maximum Operating Temperature | + 60 C | + 60 C | + 60 C |
| Minimum Operating Temperature | - 10 C | - 10 C | - 10 C |
| Product Type | Display Development Tools | - | - |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | Development Tools | - | - |
| Unit Weight | 2.010616 oz | - | - |
| Series | - | - | - |
| Interface | - | Serial | Serial |
| Display Type | - | TFT - Color | TFT - Color |
| Display Mode | - | Transmissive | Transmissive |
| Backlight | - | LED - White | LED - White |
| Background Color | - | - | - |
| Touchscreen | - | - | - |
| Diagonal Screen Size | - | 1.38" (35.05mm) | 1.38" (35.05mm) |
| Dot Pixels | - | 220 x 220 | 220 x 220 |
| Graphics Color | - | Red, Green, Blue (RGB) | Red, Green, Blue (RGB) |