Overview

The LC7216M is PLL frequency synthesizers for electronic tuning. The LC7216M is optimal for AM/FM tuner circuits that require high mounting densities.

Features

• This product feature a rich set of built-in functions for AV applications, including reference frequency and unlock detection circuits, I/O ports and a generalpurpose counter.

Functions

• Programmable dividers

— FMIN pin: 130 MHz at 70 mVrms and 160 MHz at 110 mVrms input (built-in prescaler)

— AMIN pin: Pulse swallower and direct division techniques

• Reference frequencies: Ten selectable frequencies: 1, 5, 9, 10, 3.125, 6.25, 12.5 25, 50 and 100 kHz

• Output ports: 5 pins Complementary outputs: 2 pins N-channel open drain outputs: 3 pins

• Input ports: 2 pins

• General-purpose counter: For measuring IF and other signals (Also used for station detection when functioning as an IF counter.)

— HCTR pin: Frequency measurement (for inputs up to 70 MHz)

— LCTR pin: Frequency and period measurement

• PLL unlock detection circuit Detects phase differences of 0.55, 1.11, 2.22 and 3.33 µs.

• Package: MFP20