data output [Q(n)(x)]

The outputs whose states represent the data read from the selected cells. When the device is not selected or enabled, the outputs are usually in a floating (Z, high-impedance) state. When the numbering of the data outputs is significant for device operation, the data outputs are numbered beginning with 0. In devices where data bit groupings have independent control, an additional suffix "x" is applied. "x" takes the values of a, b, c, etc.

References: 

JESD21-C, 1/97