STW81101AT

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 VCO solutions.

¦ Integer-N frequency synthesizer
¦ Dual differential integrated VCOs with
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)
¦ Excellent integrated phase noise
¦ Fast lock time: 150 µs
¦ Dual modulus programmable prescaler
(16/17 or 19/20)
¦ 2 programmable counters to achieve a
feedback division ratio from 256 to 65551
(prescaler 16/17) and from 361 to 77836
(prescaler 19/20).
¦ Programmable reference frequency divider
(10 bits)
¦ Phase frequency comparator and charge pump
¦ Programmable charge pump current
¦ Digital lock detector
¦ Dual digital bus Interface: SPI and I2C bus with
a 3-bit programmable address (1100A2A1A