DESCRIPTION

The Fujitsu MB15F78UL is a serial input Phase Locked Loop (PLL) frequency synthesizer with a 2600 MHz and a 1200 MHz prescalers. A 32/33 or a 64/65 for the 2600 MHz prescaler, and a 16/17 or a 32/33 for the 1200 MHz prescaler can be selected for the prescaler that enables pulse swallow operation.

FEATURES

• High frequency operation : RX synthesizer : 2600 MHz Max.

: TX synthesizer : 1200 MHz Max.

• Low power supply voltage : VCC = 2.4 to 3.6 V

• Ultra low power supply current : ICC = 4.5 mA Typ.

(VCC = Vp = 2.7 V, Ta = +25 °C, SWTX = SWRX = 0, in TX/RX locking state)

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

Typ. 0.1 µA (VCC = Vp = 2.7 V, Ta = +25°C)

Max. 10 µA (VCC = Vp = 2.7 V)

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

• Dual modulus prescaler : 2600 MHz prescaler (32/33 or 64/65) /1200 MHz prescaler (16/17 or 32/33)

• 23-bit shift register

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

• Serial input programmable divider consisting of :

- Binary 7-bit swallow counter : 0 to 127

- Binary 11-bit programmable counter : 3 to 2,047

• 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 to +85 °C

• Serial data format compatible with MB15F08SL