MB1509

Sept. 1995 Edition 3.0a DATA SHEET MB1509 DUAL SERIAL INPUT PLL FREQUENCY SYNTHESIZER DUAL SERIAL INPUT PLL FREQUENCY SYNTHESIZER WITH 400MHz PRESCALER The Fujitsu MB1509 is a 400MHz dual serial input PLL (Phase Locked) frequency synthesizer designed for cordless telephone application. The MB1509 has two PLL circuits on a single chip: one for transmit and the other for reception. Separate power supply pins are provided for the transmit and reception PLL circuits. Transmit PLL contains a low sensitivity charge pump for ease of modulation and reception PLL contains a high sensitivity charge pump for faster lock up time. The MB1509 incorporates two 400 MHz dual modulus prescalers to enable implemention of a pulse swallow function. It operates supply voltage of 3.0V typ. and dissipates 8mA typ. of current realized through the use of Fujitsu’s unique U-ESBIC Bi-CMOS technology. PLASTIC PACKAGE DIP-20P-M02 High operating frequency: fin = 400MHz Low power supply voltage: VCC = 2...