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March 13 2001. A new series of Dual Phase-Locked Loop (PLL) frequency synthesizers designed by Fujitsu Limited feature extremely low power consumption, fast lock times and ultra small packaging that are ideal for Mobile Phones and other Communications Products.

The new MB15F7xUL Series PLLs, members of the UL family, are now all available from Fujitsu Microelectronics for use in mobile phones, PDAs and all wireless communications applications. The devices support operating frequencies from 50MHz to 2.6GHz to meet all major phone standards.

Adopting Fujitsu's advanced U-ESBIC4 BiCMOS process and newly designed circuits, the UL Series is made up of the MB15F72UL, which has maximum operating RF and IF frequencies of 1300MHz and 350MHz respectively, while consuming 2.5mA at 2.7Volts. The MB15F73UL consumes 3.2mA at 2.7Volts and can operate at 2250MHz/600MHz maximum RF/IF frequencies. The third device, the MB15F78UL has operating RF/IF frequencies up to 2600MHz /1200MHz and consumes only 4.5mA at 2.7Volts, or 20% less than the previous model (MB15F78SP).

Moreover, by designing new independent circuits, Fujitsu was able to reduce the lock-up time by approximately 20% over the previous range. With the same pin layout as the previous PLL series (SP), the devices are fully interchangeable.

Other special features include guaranteed low-power voltage operation; Vcc = 2.4V-3.6V; a stable charge pump circuit capable of dual current switching through serial data transfer; +/-1.5 mA, +/- 6.0 mA, and high sensitivity fin inputs: Vfin (min)= -15dBm (500 ohm system).

The MB15F7xUL Series PLLs are fabricated using the latest Fujitsu advanced 0.35µm BiCMOS technology. The devices are available in two different packages. The Thin Bump Chip Carrier package BCC20 has an area of 12.24 mm2 and is 0.6 mm in height, reducing the total area by 25%. The other package used is the 20-pin TSSOP Thin Shrink Small Outline L-leaded package.

Fujitsu has been a global technology leader in PLL frequency synthesizers and, according to the company's estimates, is the global market leader with a share of about 40%. Fujitsu will continue to offer a variety of PLL synthesizers for growing markets in wireless frequency band products and Internet-related devices.


Fujitsu Microelectronics Europe

Am Siebenstein 6-10

D-63303 Dreieich-Buchschlag


Tel: +49-6103-690257

Fax: +49-6103-690122


Contact: Ines Polak


JDK Marketing Communications

The Old Granary


Goodley Stock Road

Westerham, Kent TN16 1SL

Tel: 01959 562772

Fax: 01959 562800


Contact: Joanna Muggeridge

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