LC72131KMA

Ordering number : ENA0788A LC72131K LC72131KMA CMOS IC PLL Frequency Synthesizer Overview The LC72131K and LC72131KMA are PLL frequency synthesizers for use in tuners in radio/cassette players. They allow high-performance AM/FM tuners to be implemented easily. Features High speed programmable dividers FMIN: 10 to 160MHz …………………….. pulse swallower (built-in divide-by-two prescaler) AMIN: 2 to 40MHz ………………………. pulse swallower 0.5 to 10MHz …………………….. direct division IF counter IFIN: 0.4 to 12MHz ………………………. AM/FM IF counter Reference frequencies Twelve selectable frequencies (4.5 or 7.2MHz crystal) 100, 50, 25, 15, 12.5, 6.25, 3.125, 10, 9, 5, 3, 1kHz Phase comparator Dead zone control Unlock detection circuit Deadlock clear circuit Built-in MOS transistor for forming an active low-pass filter I/O ports Dedicated output ports: 4 Input or output ports: 2 Su...