Overview

The LC72144M is an electronic tuning PLL frequency synthesizer for use in car and home products, and allows high-performance multifunction tuners to be implemented easily, since it includes an A/D converter, a high-speed lockup circuit, and a crystal oscillator circuit that support AM up-conversion.

Features

? High-speed programmable dividers for

— 10 to 160 MHz on FMIN using pulse swallower

— 0.5 to 40.0 MHz on AMIN using pulse swallower and direct division

? General-purpose counters

— HCTR for 0.4 to 25.0 MHz frequency measurement

— LCTR for 10 to 500 kHz frequency measurement and 4.0 Hz to 20 × 103 Hz period measurement

? 4.5, 7.2, 10.25 or 10.35 MHz crystal

? Twelve selectable reference frequencies (1, 3*2, 5, 9*2, 10, 3.125, 6.25, 12.5, 25, 30*2, 50 and 100*1 kHz)

Note: 1. Not supported when a 10.35 or 10.25 MHz crystal oscillator is used.

2. Not supported when a 10.25 MHz crystal oscillator is used.

? Phase comparator

— Insensitive band control

— Unlock detection

— Sub-charge pump for high-speed locking

— Deadlock clear circuit

? A/D converter: 6 bits, 2 inputs

? Serial data input and output Supports control and communication in the CCB format

? Power-on reset circuit

? On-chip crystal oscillator output buffer

? Inputs/outputs (using six general-purpose input/output ports)

? Operating ranges

— Power-supply voltage: 4.5 to 5.5 V

— Operating temperature: –40 to 85°C

? Package: MFP24S