U4454B Datasheet | TEMIC Semiconductors

Description The U4454B quasi-split-sound processor is a bipolar integrated circuit for all FM-TV standards and NICAM sound systems. For FM/NICAM the IC operates as QSS-mixer. In case of AM sound the circuit can be used as AM demodulator. Features D PLL intercarrier-mixer for all FM standards (incl. NICAM sound system) D High grade signal processing for FM/NICAM sound systems D Also suitable as AM-demodulator D Gain controlled wideband amplifier D AGC operates as a peak- and mean-level detector D High input sensitivity D Wide supply voltage range (6.8 V up to 13 V) D Low power consumption D ESD protection Case: 16-pin DIL plastic Block Diagram VCO Tank Loop filter 93 7653 12 Lock detector 16 IF Input 1 Video 90° 0° Interference rejection Output Overload detector 14 3 NC +/- Lock detector AGC +V 2 NC 5 IF AGC 7 Average Figure 1. TELEFUNKEN Semiconductors Rev. A1, 23-Feb-96 1 (7) Preliminary Information Pin Description IFin NC NC GND C5 Vout C7 1 2 3 4 5 6 7 16 IFin 15 GND 14 VS 13 CRef 12 LF 11 LF 10 GND 9 95 11256 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol IFin NC NC GND C5 Vout C7 VVCO VVCO GND LF LD CRef VS GND IFin Function IF input Not connected Not connected Ground IF-AGC time constant Output for AM (audio frequency) or FM (intercarrier frequency) Averaging value (IF-AGC function) VCO circuit VCO circuit Ground PLL loop filter PLL time constant switch Reference voltage (internal use only) Supply voltage Ground IF input VVCO 8 VVCO Absolute Maximum Ratings ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ Reference point Pin 4, unless otherwise specified Parameters Supply voltage Supply current Output current Maximum power dissipation Junction temperature Pin 14 Pin 14 Pin 6 Symbol Vs IS Iout P Tj Value Unit V...