Overview
The LC72140 and LC72140M are high-performance, phase-locked loop (PLL) frequency synthesizers that operate over the VHF, MW and LW wave bands. They feature excellent frequency tracking, making them ideal as a reference frequency source for use in AM/FM radio receivers. The LC72140 and LC72140M operate from a 5V supply. The LC72140 is available in 24-pin DIPs, and the LC72140M, in 24-pin MFPs.

Features
● High-speed programmable dividers for
    • 10 to 160MHz on FMIN using pulse swallower.
    • 0.5 to 40.0MHz on AMIN using pulse swallower and direct division.
● General-purpose counters (used together with the SD in IF count mode).
    • HCTR for 0.4 to 25.0MHz frequency measurement.
    • LCTR for 10 to 500kHz frequency measurement and 1Hz to 20kHz period measurement.
● 4.5 or 7.2MHz crystal.
● Twelve selectable reference frequencies (1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 25, 30, 50 and 100kHz).
● Phase comparator.
    • Insensitive band control.
    • Unlock detection.
    • Sub-charge pump for high-speed locking.
    • Deadlock clear circuit.
● C2B input/output data interface.
● Power-ON reset circuit.
● Built-in MOS transistor for a low-pass filter.
● Inputs/outputs (using five general-purpose input/output ports).
    • Maximum of seven inputs.
    • Maximum of seven outputs (three n-channel open-drain and four CMOS outputs).
● 5V supply.
● 24-pin DIP (LC72140) and 24-pin MFP (LC72140M).