Preliminary Data

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

March 2006

Rev 1

1/42

1

STW81101

Multi-band RF frequency synthesizer with integrated VCOs

Feature summary

automatic center frequency calibration:

– 3300 - 3900 MHz (Direct output)

– 3800 - 4400 MHz (Direct output)

– 1650 - 1950 MHz (Internal divider by 2)

– 1900 - 2200 MHz (Internal divider by 2)

– 825 - 975 MHz (Internal divider by 4)

– 950 - 1100 MHz (Internal divider by 4)

or 19/20)

feedback division ratio from 256 to 65551

(prescaler 16/17) and from 361 to 77836

(prescaler 19/20).

bits)

5x5x1.0mm

Applications

Description

The STMicroelectronics STW81101 is an

integrated RF synthesizer with voltage controlled

oscillators (VCOs). Showing high performance,

high integration, low power, and multi-band

performances, STW81101 is a low cost one chip

alternative to discrete PLL and VCOs solutions.

STW81101 includes an Integer-N frequency

synthesizer and two fully integrated VCOs

featuring low phase noise performance and a

noise floor of -154dBc/Hz. The combination of

wide frequency range VCOs (thanks to center-

frequency calibration over 32 sub-bands) and

multiple output options (direct output, divided by 2

or divided by 4) allows to cover the 825MHz-

1100MHz, the 1650MHz-2200MHz and the

3300MHz-4400MHz bands.

The STW81101 is designed with

STMicroelectronics advanced 0.35µm SiGe

process.

Order codes

VFQFPN28

Part number

Temp range,

°CPackage

Packing

STW81101AT

-40 to 85

VFQFPN28

Tray

STW81101ATR

-40 to 85

VFQFPN28

Tape & Reel

www.st.com