This paper describes efforts to achieve first pass design success for an X-band control MMIC consisting of multi-bit phase shifter, multi-bit attenuator, amplifier and serial-to-parallel converter functions using MSAG® Process 5. A discussion of the merits of multifunction MMIC integration using MSAG® Process 5 will be presented, followed by a detailed design description which is amenable to achieving first-pass design success. The X-band control MMIC designed using the MSAG® process and following the outlined design procedure exhibited excellent firstpass results including: RMS phase error less than of 2o and RMS attenuator error less than 0.3 dB. On-wafer RF screening of this 24 mm2, complex multifunction digital and microwave control MMIC resulted in an RF spec yield of over 90%…making this chip extremely desirable for low-cost solid state phased array radar T/R module applications. Cost is a significant driver today in the development of phased array systems, where modest savings at the module level can result in significant savings at the array level. The MMIC chip contribution to the module cost may be much more than the cost of the initial MMIC.