■DESCRIPITON
The Fujitsu MB15F03L is a serial input Phase Locked Loop (PLL) frequency synthesizer with a 1800MHz and a 250MHz prescalers. A 64/65 or a 128/129 for the 1800MHz prescaler, and a 16/17 or a 32/33 for 250MHz prescaler can be selected that enables pulse swallow operation. The latest BiCMOS process technology is used, resuItantly a supply current is limited as low as 5.0mA typ. at a supply voltage of 3.0V. Furthermore, a super charger circuit is included to provide a fast tuning as well as low noise performance. As a result of this, MB15F03L is ideally suitable for digital mobile communications, such as PHS(Personal Handy Phone System), PCN (Personal Communication Network) and PCS(Personal Communication Service).

■FEATURES
• High frequency operation RF synthesizer: 1800MHz max. / IF synthesizer: 250MHz max.
• Low power supply voltage: VCC= 2.7 to 3.6V
• Very Low power supply current : ICC = 5.0 mA typ. (Vcc = 3V)
• Power saving function : Supply current at power saving mode Typ.0.1µA (Vcc=3V), Max.10µA (IPS1=IPS2)
• Dual modulus prescaler : 1800MHz prescaler(64/65,128/129) , 250MHz prescaler(16/17,32/33)
• Serial input 14–bit programmable reference divider: R = 5 to 16,383
• Serial input 18–bit programmable divider consisting of:
- Binary 7–bit swallow counter: 0 to 127
- Binary 11–bit programmable counter: 5 to 2,047
• On–chip high performance charge pump circuit and phase comparator, achieving high–speed lock–up and low phase noise
• On–chip phase control for phase comparator
• Wide operating temperature: Ta = -40 to 85°C