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PDF MB15E07SR Data sheet ( Hoja de datos )
| Número de pieza | MB15E07SR | |
| Descripción | Single Serial Input PLL Frequency Synthesizer On-chip 2.5 GHz Prescaler | |
| Fabricantes | Fujitsu Media Devices | |
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FUJITSU SEMICONDUCTOR
DATA SHEET
ASSP
Single Serial Input
PLL Frequency Synthesizer
On-chip 2.5 GHz Prescaler
MB15E07SR
DS04-21378-2E
■ DESCRIPTION
The Fujitsu MB15E07SR is a serial input Phase Locked Loop (PLL) frequency synthesizer with a 2.5 GHz
prescaler. The 2.5 GHz prescaler has a dual modulus division ratio of 32/33 or 64/65 enabling pulse swallowing
operation.
The supply voltage range is between 2.7 V and 5.0 V. A refined charge pump supplies well-balanced output
currents of 1.0 mA and 4.0 mA. The charge pump current is selectable by serial data.
The phase noise of MB15E07SR was drastically improved comparing wuth the former single PLL, MB15E07SL.
The data format of serial data and the pin assignments except for φP, φR and OSCout pins are same as the former
one, so it is easy to replace the former one.
MB15E07SR is ideally suited for the base station of GSM (Global System for Mobile Communications) and PCS.
■ FEATURES
• High frequency operation: 2.5 GHz Max
• Low power supply voltage: VCC = 2.7 V to 5.0 V
• Ultra Low power supply current:ICC = 8.0 mA Typ (VCC = Vp = 3.75 V, Ta = +25°C, in locking state)
• Direct power saving function:Power supply current in power saving mode
Typ 0.1 µA (VCC = Vp = 3.75 V, Ta = +25°C)
• Dual modulus prescaler: 32/33 or 64/65
■ PACKAGES
(Continued)
16-pin plastic TSSOP
16-pad plastic BCC
(FPT-16P-M07)
(LCC-16P-M06)
1 page  
MB15E07SR
■ ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Condition
Rating
Min Max
Unit Remark
Power supply voltage
VCC
VP
–
–0.5
5.5
V
–
VCC 6.0
V
Input voltage
VI
–
–0.5
VCC + 0.5
V
Output voltage
Storage temperature
VO
VO
Tstg
Except Do
Do
–
GND
GND
–55
VCC
VP
+125
V
V
°C
WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,
temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
■ RECOMMENDED OPERATING CONDITIONS
Parameter
Value
Symbol
Unit
Min Typ Max
Remark
Power supply voltage
VCC 2.7 3.75 5.0 V
VP VCC – 5.5 V
Input voltage
Operating temperature
VI
GND
–
Ta –40 –
VCC V
+85 °C
WARNING: The recommended operating conditions are required in order to ensure the normal operation of the
semiconductor device. All of the device’s electrical characteristics are warranted when the device is
operated within these ranges.
Always use semiconductor devices within their recommended operating condition ranges. Operation
outside these ranges may adversely affect reliability and could result in device failure.
No warranty is made with respect to uses, operating conditions, or combinations not represented on
the data sheet. Users considering application outside the listed conditions are advised to contact their
FUJITSU representatives beforehand.
5
5 Page 
MB15E07SR
When designing a synthesizer, the FC pin setting depends on the VCO and LPF characteristics.
When the LPF and VCO characteristics are similar
to (1), set FC bit high.
When the VCO characteristics are similar to (2),
set FC bit low.
(1)
PLL LPF VCO
VCO
Output
Frequency
Note : Give attention to the polarity for using active type LPF.
LPF Output Voltage
(2)
3. Power Saving Mode (Intermittent Mode Control Circuit)
Table 9. PS Pin Setting
PS pin
Status
H Normal mode
L Power saving mode
The intermittent mode control circuit reduces the PLL power consumption.
By setting the PS pin low, the device enters into the power saving mode, reducing the current consumption. See
the Electrical Characteristics chart for the specific value.
The phase detector output, Do, becomes high impedance.
For the signal PLL, the lock detector, LD, remains high, indicating a locked condition.
Setting the PS pin high, releases the power saving mode, and the device works normally.
The intermittent mode control circuit also ensures a smooth startup when the device returns to normal operation.
When the PLL is returned to normal operation, the phase comparator output signal is unpredictable. This is
because of the unknown relationship between the comparison frequency (fp) and the reference frequency (fr)
which can cause a major change in the comparator output, resulting in a VCO frequency jump and an increase
in lockup time.
To prevent a major VCO frequency jump, the intermittent mode control circuit limits the magnitude of the error
signal from the phase detector when it returns to normal operation.
11
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet MB15E07SR.PDF ] | |
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