Described herein is an asynchronous serial dichotomic sense amplifier comprising a first comparator stage having a first input receiving the cell current flowing in the multilevel memory cell, the content of which is to be read, a second input receiving a first reference current, and an output supplying the first of the bits stored in the multilevel memory cell; a multiplexer stage having a selection input connected to the output of the first comparator stage, a first signal input receiving a second reference current, a second signal input receiving a third reference current, and a signal output selectively connectable to the first or the second signal input depending on the logic level present on the selection input; and a second comparator stage having a first input receiving the cell current, a second input connected to the signal output of the multiplexer stage, and an output supplying the second of the bits stored in the multilevel memory cell.