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 â¦â¦â¦â¦â¦â¦â¦â¦.. pulse swallower (built-in divide-by-two prescaler)
⢠AMIN: 2 to 40MHz â¦â¦â¦â¦â¦â¦â¦â¦â¦. pulse swallower
0.5 to 10MHz â¦â¦â¦â¦â¦â¦â¦â¦.. direct division
⢠IF counter
⢠IFIN: 0.4 to 12MHz â¦â¦â¦â¦â¦â¦â¦â¦â¦. 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
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