Description
The U4280BM is an integrated circuit in BICMOS technology for frequency synthesizer. It performs all the functions of a PLL radio tuning system and is controlled by I2C bus. The device is designed for all frequency synthesizer applications of radio receivers, as well as RDS (Radio Data System) applications.

Features
● Frequency range up to 150 MHz
● Pre-amplifier for AM and FM
● Fine tuning steps: AM ≥ 1kHz FM ≥ 2 kHz
● Two programmable 16-bit divider, adjustable from 2 to 65535
● Reference oscillator up to 15 MHz
● 5 programmable switching outputs, 4 are open drain outputs up to 15 V
● Phase detector with separate outputs for AM and FM
● Controlled via I2C bus