Maxim 72197221 series linear ic led display drivers maxim max7219ewg the max7219ewg is an so 24 packaged led display driver with a serial interface that can drive 7 segment numeric led displays of up to 8 digits bar graph displays or 64 individual leds suitable for applications such as industrial controls panel meters and led matrix displays maxim max7219ewg linear ic so 24l 8 digit led display driver