A circuit includes a plurality of first circuits, a selection circuit, and a second circuit. The selection circuit is configured to selectively couple a first circuit of the plurality of first circuits with the second circuit. The first circuit includes a first data line and a second data line; and a pair of cross-coupled transistors of a first type coupled with the first data line and the second data line. The second circuit includes a first switching circuit and a second switching circuit; and a pair of cross coupled transistors of a second type different from the first type. The pair of cross-coupled transistors of the first circuit and the pair of cross-coupled transistors of the second circuit are configured as part of a sense amplifier when the first switching circuit and the second switching circuit are turned on.