Tokyo, June 28, 2001--- In collaboration with Kyushu Fujitsu Electronics and Fujitsu VLSI, Fujitsu Limited announced today that the three firms have developed a new series of LSI Phase-Locked Loop (PLL)*1 synthesizers with operating frequencies ranging from 50MHz to 2.6GHz. Fujitsu Limited brings to market today this product series, comprising MB15F83UL, MB15F86UL, and MB15F88UL.
The new products incorporate fractional-N*2 and SCCT*3 technologies, which speed up lock-up time*4 and reduce power consumption, thereby helping to enhance the quality of mobile phones.
The growth in the mobile phone market has been stimulating demand for PLL frequency synthesizers, which are essential components of wireless communications devices.
The use of fractional-N technology in the new devices makes it possible to meet the demands of next-generation digital mobile phone systems, including the need for speedier frequency-switching. In addition, utilization of Fujitsu's unique SCCT technology makes it possible to reduce spurious noise*5 as well as to achieve low power consumption (18 mW) and a lock-up time of about 140 microseconds, approximately half that of conventional models. (This lock-up time applies when using GSM*6 applications.)
Moreover, adopting Fujitsu's highly advanced BiCMOS U-ESBIC4*7 technology enables reduced power consumption and extension of the operating-frequency range to 2.6GHz.
Incorporation of these technologies eliminates the need for any external parts other than a switching terminal for high-speed lock-up and LPF*8 parts. In addition, the new products utilize a slim BCC*9-20 package, allowing a 36% reduction in total board area.
Fujitsu is a leader in the global market for PLL frequency synthesizers, holding an estimated share of about 33%. Fujitsu will continue its efforts to develop innovative RF systems and Internet-related products with a focus on PLL frequency synthesizers for the continuously expanding mobile phone market.
Availability: June 28, 2001 (sample)
Sample Price: 300 yen in Japan (tax not included)
Sales Target: 8 million units/month
Product Highlights
- The power current of each device is set according to its maximum operating frequency in order to accommodate a variety of cellular telephone systems (GSM, W-CDMA, TDMA, etc.).
| - | MB15F83UL (Modulo10: fixed at 13; frequencies: 2.0/0.6GHz)
Power-saving current: 5.8mA @Vcc=3.0V |
| - | MB15F86UL (Modulo: variable from 3 to 16; frequencies 2.0/0.6GHz)
Power-saving current: 5.8mA @Vcc=3.0V |
| - | MB15F88UL (Modulo: selects 5 or 8; frequencies 2.6/1.2GHz)
Power-saving current: 6.0mA @Vcc=3.0V |
- High speed lock-up time: about 50% faster than previous models (FxxSL/F7xSP series)
- Low-power voltage operating range: Vcc=2.7 to 3.6V
- Stable-current charge pump circuit capable of dual current switching through serial data transfer:
 1.5mA, 6.0mA
- High-sensitivity fin inputs: Pfin (min.)= -15dBm (50-ohm series)
- Ultra thin small package: TSSOP-20 pins and BCC10-20 balls with standard width of 0.55 mm
- Easily interchangeable with the current MB15F7xSP and F7xUL series due to common pin layout
Terminology
- 1. PLL (Phase locked loop):
- Detects differences in the output frequency, the input, and the frequency of the standard oscillator. It controls the feedback circuit, and synchronizes the frequency of the oscillator.
- 2. Fractional-N:
- A system that divides frequency into fractional parts.
- 3. SCCT (Spurious Cancellation based on standardized Constant Time System):
- A circuit system that eliminates the phase difference generated by fractional-N usage.
- 4. Lock-up time:
- Time required for switching frequencies.
- 5. Spurious noise:
- Unwanted tones caused by interference between circuits, such as unintended signals or distortions.
- 6. GSM (Global System for Mobile Communications):
- A type of digital cellular telephone used mainly in countries in Europe and Asia.
- 7. U-ESBIC (U-groove isolated emitter base self-aligned BiCMOS)4:
- Name of the process which incorporates Fujitsu's BiCMOS technology to self-adjust the emitter and the base. It has the advantages of both bipolar's high frequency and the CMOS component's low-power consumption.
- 8. LPF (Low Pass Filter):
- A circuit used to remove unnecessary high-frequency levels, leaving only necessary low-frequency levels.
- 9. BCC (bump chip carrier):
- A type of surface-mountable packaging.
- 10. Modulo:
- Numerator of the frequency-dividing fraction.
About Fujitsu
Fujitsu is a leading provider of Internet-focused information technology solutions for the global marketplace. Its pace-setting technologies, best-in-class computing and telecommunications platforms, and worldwide corps of systems and services experts make it uniquely positioned to unleash the infinite possibilities of the Internet to help its customers succeed. Headquartered in Tokyo, Fujitsu Limited (TSE:6702) reported consolidated revenues of 5.48 trillion yen for the fiscal year ended March 31, 2001.
Internet: http://www.fujitsu.com/
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