General Description
The RL508 is a single-chip broadcast FM stereo radio tuner with fully integrated building blocks as LNA, VCO with digital synthesizer, digital channel selection filter, digital FM demodulator and MPX decoder. The RL508 integrates the tuner function from antenna input to stereo audio output for worldwide European, US, Japanese and China FM bands. The FM tuner only requires a minimum amount of small and low cost external components to be a very attractive solution for portable devices. With a powerful audio engine, the RL508 is able to deliver optimum sound quality under hostile channel conditions.

Features
■ Worldwide FM band support (64–108 MHz)
■ Digital frequency synthesizer
■ On-chip VCO
■ On-chip loop filter
■ Autonomous search tuning
■ Automatic frequency control (AFC)
■ Automatic gain control (AGC)
■ Signal strength measurement
■ Programmable de-emphasis (50/75 μs)
■ Digital adaptive noise suppression
■ Volume control
■ 32.768 kHz, 12M, 24M, 13M, 26M, 19.2M, 38.4MHz reference clock
■ 2-wire control interface
■ 2.0 V to 3.6 V supply voltage
■ Integrated LDO regulator
■ SOP-8 package
■ Pb-free / RoHS compliant
■ Integrated crystal oscillator
■ Built in audio amp for 32ohm load

Applications
■ Headphones
■ MP3, MP4 players
■ Portable radios
■ PDA
■ Notebook PC
■ Gift