Fractional RF Synthesizers

Two new frequency synthesizers designed for next-generation wireless phone, satellite, two-way paging, two-way radio and wireless local-area network (LAN) applications have been added to a Synthesizer Phase-Lock Loop (PLL) family. The CX74038 and CX74039 will decrease the number of components typically required to implement an RF subsystem.

Frequency synthesizers are key building blocks required in the design of all wireless products -- from mobile phones to wireless infrastructure equipment such as base stations and satellite terminals. They create the RF signal used by cellular handsets and base stations to send and receive wireless voice and data transmissions.

These parts feature settling times under 200 microseconds, which is approximately 80 percent faster than competitive solutions. Low phase noise improves the ability of the RF circuit to generate and maintain signals over a longer distance, enhancing wireless transmission with fewer lost connections. Other features include phase noise as low as -95dBc/Hz, more than 90 percent lower than alternative offerings, and power consumption as low as 14 mW.

The CX74038 and CX74039 are packaged as a 20-pin thin shrink small outline package (TSSOP) and manufactured using a high-performance BiCMOS process.

Conexant Systems, Inc., 4311 Jamboree Rd., PO Box C, Newport Beach, CA 92658-8902. Tel: 949-483-6307; Fax: 949-483-4078.