The Fujitsu MB1507 is a single chip serial input PLL frequency synthesizer designed for Broadcast Satelite tuner and cellular telephone applications. It contains a 2.0 GHZ dual modulus prescaler which enables pulse swallow function, and an analog switch to speed up lock up time. It operates supply voltage of 5.0V typ. and dissipates 18mA typ. of current realized through the use of Fujitsu's unique U-ESBIC Bi-CMOS technology.