DESCRIPTION

The Fujitsu MB15F76UL is a serial input Phase Locked Loop (PLL) frequency synthesizer with a 6.0 GHz and a 1.5 GHz prescalers. Both prescalers for RF and IF have a 1/4 divider. A 16/17 or a 32/33 for the 6.0 GHz prescaler, and a 4/5 or a 8/9 for the 1.5 GHz prescaler can be selected for the prescaler that enables pulse swallow operation. The BiCMOS process is used, as a result a supply current is typically 8.5 mA at 3.0 V. The supply voltage range is from 2.5 V to 3.6 V. A refined charge pump supplies well-balanced output current with 1.5 mA and 6 mA selectable by serial date. The pin assignments are is the same as the MB15F78UL. Fast locking is achieved for adopting the new circuit.

The new package (BCC20) decreases a mount area of MB15F76UL more than 30 comparing with the former BCC16 (for dual PLL) .

FEATURES

• High frequency operation : RF synthesizer : 6.0 GHz Max

: IF synthesizer : 1.5 GHz Max

• Low power supply voltage : VCC = 2.5 V to 3.6 V

• Ultra low power supply current : ICC = 8.5 mA Typ

(VCC = Vp = 3.0 V, Ta = +25 °C, SWIF = SWRF = 0 in IF/RF locking state)

• Direct power saving function : Power supply current in power saving mode

Typ. 0.1 µA (VCC = Vp = 3.0 V, Ta = +25 °C)

Max. 10 µA (VCC = Vp = 3.0 V)

• Software selectable charge pump current : 1.5 mA/6.0 mA Typ

• Dual modulus prescaler : 6.0 GHz prescaler (1/4 divider and 16/17 or 32/33) /

1.5 GHz prescaler (1/4 divider and 4/5 or 8/9)

• 23-bit shift register

• Serial input binary 14-bit programmable reference divider : R = 3 to 16,383

• Serial input programmable divider consisting of:

- Binary 5-bit swallow counter : 0 to 31

- Binary 13-bit programmable counter : 3 to 8,191

• Built-in high-speed tuning, low-noise phase comparator, current-switching type constant current circuit

• On-chip phase control for phase comparator

• On-chip phase comparator for fast lock and low noise

• Built-in digital locking detector circuit to detect PLL locking and unlocking

• Operating temperature : Ta = −40 °C to +85 °C