Provided is a pagewidth printer having an elongate bi-lithic printhead unit. The unit includes two integrated circuits laid end-to-end, each having a multitude of micro-electromechanical nozzles for operatively ejecting printing fluid, and an ink distribution plate for feeding printing fluid into apertures defined in the integrated circuits. The unit also includes an ink distribution molding defining a plurality of elongate conduits for distributing printing fluid to the plate along a length of the printhead, and an end plug configured for fitment onto an end of the distribution molding to arrange said conduits in fluid communication with ink reservoirs. The unit further includes a printed circuit board (PCB) configured to relay data signals from a printer controller to respective ends of the integrated circuits.