MB15E07SR - Single Serial Input PLL Frequency Synthesizer On-chip 2.5 GHz Prescaler

General 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 1.0mA and 4.0 mA. The charge pump current is selectable by serial data. The phase noise of MB15E07SR was drastically improved comparing with the former single PLL, MB15E07SL. The data format of serial dta and the pin assignments exept for ? P ,? R 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) or PCS.

Technical Features

• High frequency operation: 2.5 GHz max
• Low power supply voltage: VCC = 2.7 to 5.0 V
• Ultra Low power supply current: ICC = 8.0 mA typ. (VCC = Vp = 3.75 V, Ta = +25 °C, SW=0 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.
• Serial input 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
• Software selectable charge pump current.
• On-chip phase control for phase comparator
• Operating temperature: Ta = –40 to +85 °C