FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-21364-3E
ASSP
Dual S
erial Input
PLL Frequency
Synthesizer
MB15F78SP
s
DESCRIPTION
The Fujitsu MB15F78SP is a serial input Phase Locked Loop (PLL) frequency synthesizer with a 2550 MHz pres-
caler and a 1200 MHz prescaler. A 32/33 or a 64/65 for the 2550 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.
The BiCMOS process is used , as a result a supply current is typically 5.5 mA at 2.7 V. The supply voltage range
is from 2.4 V to 3.6 V. A refined charge pump supplies well-balanced output current with 1.5 mA and 6 mA select-
able by serial data.
The new package (BCC20) decreases an area of MB15F78SP more than 30 % comparing with the former BCC16
(for dual PLL).
MB15F78SP is ideally suited for wireless mobile communications, such as GSM.
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FEATURES
• High frequency operatio
•
•
•
•
: RX synthesizer : 2550 MHz max
: TX synthesizer : 1200 MHz max
Low power supply voltage
: V
CC
= 2.4 to 3.6 V
Ultra Low power supply current : I
CC
= 5.5 mA typ.
(V
CC
= Vp = 2.7 V, Ta = +25°C, SW
TX
= SW
RX
= 0, in TX/RX locking state)
Direct power saving function
: Power supply current in power saving mode
Typ. 0.1
µA
(V
CC
= Vp = 2.7 V, Ta = +25°C), Max. 10
µA
(V
CC
= Vp = 2.7 V)
Software selectable charge pump current: 1.5 mA/6.0 mA typ.
(Continued)
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PACKAGES
20-pin plastic TSSOP
20-pad plastic BCC
(FPT-20P-M06)
(LCC-20P-M04)
FUJITSU [ FUJITSU COMPONENT LIMITED. ]
