TDA7427 - ST Microelectronics

TDA7427 AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER

The TDA7427 is a PLL frequency synthesizer BLOCK DIAGRAM DIP20 SO20 ORDERING NUMBERS: TDA7427(DIP20) TDA7427D (SO20) with an additional IF counting system that performs all the functions needed in a complete PLL radio tuning system for conventional and high speed RDS tuners. The device has dedicated outputs for IN-LOCK detection and Search/Stop station. .

Features

CK DETECTOR 2 3 SWITCH LP1/LP2 1 DOUT1/INLOCK LP_HC LP_AM LP_FM AM_IN 17 LPOUT 11 BIT PROG CNT OSCIN OSCOUT 5 6 REF OSCILLATOR 16 BIT PROG CNT 4 VREF SCL SDA 8 9 I2C BUS INTERFACE 18 GNDan/GNDdig VDD2 VDD1 19 15 14 BIT PROG CNT TIMER CONTROL TEST LOGIC POWER ON RESET IF_AM 10 11-21 BIT PROG CNT PORT EXTENSION IF_FM 11 12 D95AU418B 7 DOUT3 SSTOP November 1999 1/21 TDA7427 ABSOLUTE MAXIMUM RATINGS Symbol VDD1 VDD2 Ptot Tstg Tamb Supply Voltage Supply Voltage Total Power Dissipation Storage Temperature Ambient Temperature Parameter Value - 0.3 to + 7 - 0.3 to + 11 300 - 55.