The HMC216MS8 & HMC216MS8E are ultra miniature double-balanced FET mixers in 8 lead plastic surface mount packages (MSOP). This MMIC mixer is constructed of switched GaAs FETs and novel planar transformer baluns on the chip. In addition to an LO drive of +3 to +13 dBm, a gate voltage of Vgg = -0.9 to -1.6 Vdc is required. The device can be used as an upconverter or downconverter for 1900 or 2400 MHz applications. The consistent MMIC performance will improve system operation and assure regulatory compliance.