onsemi LC72131K
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