An integrated circuit comprising a first bitline pair 310 on a first bitline level which is adjacent to a second bitline pair 320 on a second bitline level is provided. The first bitline pair comprises m twists 340, where m is a whole number≧1 and the second bitline pair comprises n twists 350 and 351, where n is a whole number ≠m. The twists transform coupling noise from adjacent bitline pairs into common mode noise, which results in improved signal margin.