The Fujitsu MB15F74UL is a serial input Phase Locked Loop (PLL) frequency synthesizer with a 4000 MHz and
a 2000 MHz prescalers. A 64/65 or a 128/129 for the 4000 MHz prescaler, and a 32/33 or a 64/65 for the
2000 MHz 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 9.0 mA at 3.0 V. The supply voltage range
is from 2.7 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 the same as MB15F78UL. Fast locking is achieved for adopting
the new circuit.
The new package (BCC20) decreases a mount area of MB15F74UL more than 30
BCC16 (for dual PLL) .
• High frequency operation
• Low power supply voltage
• Ultra low power supply current : I
: RF synthesizer : 4000 MHz Max
: IF synthesizer : 2000 MHz Max
2.7 to 3.6 V
9.0 mA Typ
3.0 V, Ta
25 C, SW
20-pad plastic BCC
comparing with the former
0 in IF/RF locking state)