STW81103AT

The STMicroelectronics STW81103 is an
integrated RF synthesizer with voltage controlled
oscillators (VCOs). Showing high performance,
high integration, low power, and multi-band
performances, STW81103 is a low cost one chip
alternative to discrete PLL and VCOs solutions.

¦ Integer-N frequency synthesizer
¦ Dual differential integrated VCOs with
automatic center frequency calibration:
– 2500 - 3050 MHz (direct output)
– 4350 - 5000 MHz (direct output)
– 1250 - 1525 MHz (internal divider by 2)
– 2175 - 2500 MHz (internal divider by 2)
– 625 - 762.5 MHz (internal divider by 4)
– 1087.5 - 1250 MHz (internal divider by 4)
¦ Excellent integrated phase noise
¦ Fast lock time: 150µs
¦ 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 (fast
mode) with 3 bit programmable addr