Na+,K+-ATPase, in plasma membranes of most animal cells is an antiport pump.
It catalyzes ATP-dependent transport of Na+ out of a cell in exchange for K+ entering.
(H+, K+)-ATPase, involved in acid secretion in the stomach is an antiport pump.
It catalyzes transport of H+ out of the gastric parietal cell (toward the stomach lumen) in exchange for K+ entering the cell.
how the Sodium Potassium Pump works