DESCRIPTION
The TDA7427A is a PLL frequency synthesizer 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.

■ ON-CHIP REFERENCE OSCILLATOR AND PROGRAMMABLE IF COUNTER
■ VHF INPUT AND PRECOUNTER FOR FREQUENCIES UP TO 290MHz (SUITABLE FOR DAB APPLICATION)
■ HF INPUT FOR FREQUENCIES UP TO 64MHz (SHORT WAVE BAND)
■ IN-LOCK DETECTOR FOR SEARCH/STOP STATION FUNCTION
■ STAND-BY MODE FOR LOW POWER CONSUMPTION
■ HIGH CURRENT SOURCE FOR 0.5ms LOCK-IN TIME
■ DIGITAL PORT EXTENSION WITH SIX OUTPUTS FOR FLEXIBILITY IN APPLICATION
■ FULLY PROGRAMMABLE BY I2C BUS