When sourcing a 240x64 Graphic LCD, you must prioritize the Controller IC (e.g., T6963C, RA8835, or UC1608) as it determines software compatibility. Additionally, verify the Interface Type (Parallel 8-bit is standard, but SPI/I2C options offer pin savings), Backlight Color (Yellow-Green, Blue, or White), and Polarizer Type (Transflective for outdoor visibility or Transmissive for dark environments). Ensure the Operating Voltage (typically 3.3V or 5V) aligns with your PCB design to avoid component burnout.