the present invention integrates a wwtm circuit with the write driver circuitry , which is an inherent part of any conventional sram design . thus , a circuit for writing data into and weak write testing a memory cell is provided . in one embodiment , the circuit comprises a write driver that has an output for applying a write or a weak write output signal at the memory cell . the write driver has first and second selectable operating modes . in the first mode , the write driver is set to apply a weak write output signal from the output for performing a weak write test on the cell . in the second mode , the write driver is set to apply a normal write output signal that is sufficiently strong for writing a data value into the cell when it is healthy .