LC72720M

Ordering number : EN *5602 CMOS LSI LC72720, 72720M Single-Chip RDS Signal-Processing System LSI Preliminary Overview The LC72720 and LC72720M are single-chip system LSIs that implement the signal processing required by the European Broadcasting Union RDS (Radio Data System) standard and by the US NRSC (National Radio System Committee) RDBS (Radio Broadcast Data System) standard. These LSIs include band-pass filter, demodulator, synchronization, and error correction circuits as well as data buffer RAM on chip and perform effective error correction using a soft-decision error correction technique. Package Dimensions unit: mm 3067-DIP24S [LC72720] Functions Band-pass filter: Switched capacitor filter (SCF) Demodulator: RDS data clock regeneration and demodulated data reliability information Synchronization: Block synchronization detection (with variable backward and forward protection conditions) Error correction: Soft-decision/hard-decision error correction Buffer RAM: Adequate for 24 blocks of data (about 500 ms) and flag memory Data I/O: CCB interface (power on reset) SANYO: DIP24S unit: mm 3045B-MFP24 [LC72720M] Features Error correction capability improved by soft-decision error correction The load on the control microprocessor can be reduced by storing decoded data in the on-chip data buffer RAM. Two synchronization detection circuits provide continuous and stable detection of the synchronization timing. Data can be read out starting with the ...