FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-21342-1E
ASSP
Dual Serial Input
PLL Frequency Synthesizer
MB15F04
s
DESCRIPTION
The Fujitsu MB15F04 is a serial input Phase Locked Loop (PLL) frequency synthesizer with two 2.0GHz prescalers.
A 64/65 or a 128/129 for both 2.0GHz prescalers can be selected that enables pulse swallow operation.
The latest BiCMOS process technology is used, resuItantly a supply current is limited as low as 11.0mA 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, MB15F04 is ideally suitable for digital mobile communications.
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FEATURES
• High frequency operation
•
•
•
•
•
RX synthesizer : 2.0 GHz max.
TX synthesizer : 2.0 GHz max.
Low power supply voltage: V
CC
= 2.7 to 3.6 V
Very Low power supply current : I
CC
= 11.0 mA typ. (Vcc = 3V)
Power saving function : I
PSTX
= I
PSTX
= 10
µ
A max.
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
Wide operating temperature: Ta =
−
40 to 85
°
C
•
•
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PACKAGE
20-pin, Plastic SSOP
(FPT-20P-M03)
MB15F04
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PIN DESCRIPTIONS
Pin No.
1
2
3
4
5
6
Pin name
GND
RX1
OSCin
GND
TX
fin
TX
Vcc
TX
Xfin
TX
I/O
–
I
–
I
–
I
Ground for RX–PLL section.
The programmable reference divider input. TCXO should be connected with a
AC coupling capacitor.
Ground for the TX-PLL section.
Prescaler input pin for the TX-PLL.
The connection with VCO should be AC coupling.
Power supply voltage input pin for the TX-PLL section.
When power is OFF, latched data of TX-PLL is cancelled.
Prescaler complimentary input for the TX-PLL section.
This pin should be grounded via a capacitor.
Analog switch output (BS
TX
) control for the TX section.
Always pull-down the BSC
TX
pin when not using BS
TX
. (Do not leave open.)
BSC
TX
= “H”; outputs the Do
TX
state.
BSC
TX
= “L” ; goes to high impedance.
Power saving mode control for the TX-PLL section. This pin must be set
at “L” Power-ON. (Open is prohibited.)
PS
TX
= “H” ; Normal mode
PS
TX
= “L” ; Power saving mode
Charge pump output for the TX-PLL section.
Phase characteristics of the phase detector can be reversed by FC-bit.
Analog switch output for the TX selection.
Ground 2 for the RX section.
Charge pump output for the RX-PLL section.
Phase characteristics of the phase detector can be reversed by FC-bit.
Power saving mode control for the RX-PLL section. This pin must be set
at “L” Power-ON. (Open is prohibited.)
PS
RX
= “H” ; Normal mode
PS
RX
= “L” ; Power saving mode
Lock detect signal output (LD) / phase comparator monitoring output (fout)
The output signal is selected by a LDS bit in a serial data.
LDS bit = “H” ; outputs fout signal
LDS bit = “L” ; outputs LD signal
Prescaler complimentary input for the RX-PLL section.
This pin should be grounded via a capacitor.
Power supply voltage input pin for the RX-PLL section.
When power is OFF, latched data of RX-PLL is cancelled.
Prescaler input pin for the RX-PLL.
The connection with VCO should be AC coupling.
Load enable signal input (with the schmitt trigger circuit.)
When LE is “H”, data in the shift register is transferred to the corresponding
latch according to the control bit in a serial data.
Serial data input (with the schmitt trigger circuit.)
A data is transferred to the corresponding latch (TX-ref counter, TX-Prog.
counter, RX-ref. counter, RX-prog. counter) according to the control bit in a
serial data.
Clock input for the 23-bit shift register (with the schmitt trigger circuit.)
One bit data is shifted into the shift register on a rising edge of the clock.
Descriptions
7
BSC
TX
I
8
PS
TX
I
9
10
11
12
Do
TX
BS
TX
GND
RX2
Do
RX
O
O
–
O
13
PS
RX
I
14
LD/fout
O
15
16
17
18
Xfin
RX
Vcc
RX
fin
RX
LE
I
–
I
I
19
Data
I
20
Clock
I
3
MB15F04
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ABSOLUTE MAXIMUM RATINGS (See WARNING)
Parameter
Power supply voltage
Input voltage
Output voltage
Output current
Storage temperature
Symbol
V
CC
V
I
V
O
I
O
T
STG
Rating
–0.5 to +4.0
–0.5 to V
CC
+0.5
–0.5 to V
CC
+0.5
–10 to +10
–55 to +125
Unit
V
V
V
mA
°C
Remark
WARNING:
Permanent device damage may occur if the above
Absolute Maximum Ratings
are exceeded.
Functional operation should be restricted to the conditions as detailed in the operational sections of
this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
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RECOMMENDED OPERATING CONDITIONS
Parameter
Power supply voltage
Input voltage
Operating temperature
Symbol
V
CC
V
i
Ta
Value
Min
2.7
GND
–40
Typ
3.0
–
–
Max
3.6
V
CC
+85
Unit
V
V
°C
Note
V
CCTX
= V
CCRX
Handling Precautions
• This device should be transported and stored in anti-static containers.
• This is a static-sensitive device; take proper anti-ESD precautions. Ensure that personnel and equipment are
properly grounded. Cover workbenches with grounded conductive mats.
• Always turn the power supply off before inserting or removing the device from its socket.
• Protect leads with a conductive sheet when handling or transporting PC boards with devices.
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Power technology
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