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URL: http://www.princeton.com.tw
RDS Demodulator IC
PT2579
DESCRIPTION
PT2579 is a Radio Data System Demodulator IC utilizing CMOS Technology specially designed for
radio data system applications. The RDS data signal (RDDA) and the RDS clock signal (RDCL) are
provided as outputs for further processing by an ideal decoder / microcontroller. Anti-aliasing Filter (2nd
order), 57kHz band pass filter (8th order), reconstruction filter (2nd order), clocked comparator with
automatic offset compensation, biphase symbol decoder, differential decoder, and signal quality
detector are all built into a single chip having the highest performance and reliability. Pin assignments
and application circuit are optimized for easy PCB layout and cost saving advantages.
FEATURES
CMOS Technology
Low Power Consumption
Anti-Aliasing Filter (2nd Order)
Reconstruction Filter (2nd Order)
57kHz Band-Pass Filet (8th Order)
57kHz Carrier Regeneration
Differential Decoder
Signal Quality Detector
Subcarrier Output
Selectable 4.332 / 8.664 MHz Crystal Oscillator with Variable Dividers
Synchronous Demodulator for 57kHz Modulated RDS Signals
Clocked Comparator with Automatic Offset Compensation
Clock Generation with Lock on Biphase Data Rate
Biphase Symbol Decoder with Integrate and Dump Functions
Available in 16 pins, DIP or SOP Package
APPLICATIONS
Car Radio
Home Stereo Tuner
PT2579 v1.3
-1-
April. 2004
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