HD44780 Industry Standard With brazed I2C communication adapter This will only 4 I/O cables (power supply + 2 xDatenleitungen) for operation is required Adapter chip: PCF8574 AT Both 3.3 V and 5 V logic level (@ Power supply 5 V) 20 x 4 characters (4 rows with 20 columns) Background lighting: color blue Approx. 9.8 * 6 * 2 cm https://elecena.pl/product/28015689/joy-it-lcd-20x4-lcd-module 2025-03-12 https://elecena.pl/product/28015689/joy-it-lcd-20x4-lcd-module 2025-09-17