If you’ve not played with the Hitachi HD44780 LCD controller before, it has four-bit and eight-bit data modes. In four-bit, used here, you only need to send data on D4, D5, D6, and D7.

Abs max sustained voltage in any bus pin is ±16V with respect to the ground pin (not shown in the diagram). The device is characterised for ambient temperatures from –40 to 125°C. Packaging is 3 x 3mm ...