TB1212N

The TB1212N is a single chip processor for NICAM system.This is to get a PCM sound signal from QPSK modulated signal and to get an analog sound signal selected between said PCM sound signal and FM sound signal.Functionally,QPSK demodulation,sound data decoding,sound channel selection,digital filter,DAC,and son on are integrated into one chip.

Features of the TB1212N are:(1)AGC circuit;(2)phase synchronous demodulation by base band select PLL;(3)frame sync. detection;(4)de-scramble;(5)control data majority-decision detection;(6)de-interleave;(7)range bit majority-decision detection;(8)control information bit majority-decision detection;(9)parity detection and error correction;(10)10 to 14 bit expansion;(11)digital muting circuit;(12)I2C bus interface;(13)built in RAM;(13)2 times over samopling digital filter;(14)switchable digital de-emphasis;(15)182 times over sampling DAC;(16)5V power supply.

The absolute maximum ratings of the TB1212N can be summarized as:(1):the charcteristic is supply voltage,the symbol is Vcc,VDD,the rating is VSS to VSS+6.0,the unit is V;(2):the charcteristic is input voltage,the symbol is VIN,the rating is -0.3 VCC,VDD+0.3,the unit is V;(3):the charcteristic is power dissipation,the symbol is PD,the rating is 1900,the unit is mW;(4):the charcteristic is power dissipation,the symbol is PD,the rating is 900,the unit is mW;(5):the charcteristic is storage temperature,the symbol is Tstg,the rating is -55 to 125,the unit is .