Overview
The LC72131K and LC72131KM 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 • Support clock time base output
• Serial data I/O
   • Support CCB format communication with the system controller.
• Operating ranges
   • Supply voltage ........................4.5 to 5.5V • Operating temperature ............ -40 to +85°C
• Packages
   • DIP22S/MFP20