Overview

The LC72121MA are high input sensitivity (20mVrms at 130MHz) PLL frequency synthesizers for 3V systems.

These ICs are serial data (CCB) compatible with the LC72131K/KMA, and feature the improved input sensitivity and lower spurious radiation (provided by a redesigned ground system) required in high-performance AM/FM tuners.

Features
• High-speed programmable divider
    • FMIN: 10 to 160MHz ·················· Pulse swallower technique (With built-in divide-by-2 prescaler)
    • AMIN: 2 to 40MHz ····················· Pulse swallower technique 0.5 to 10MHz ·················· Direct division technique
• IF counter
    • IFIN: 0.4 to 15MHz ····················· For AM and FM IF counting
• Reference frequency
    • One of 12 reference frequencies can be selected (using a 4.5 or 7.2MHz crystal element) 1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 15, 25, 50, and 100kHz
• Phase comparator
    • Supports dead zone control.
    • Built-in unlocked state detection circuit
    • Built-in deadlock clear circuit
    • An MOS transistor for an active low-pass filter is built in.
• I/O ports
    • Output-only ports: 4 pins
    • I/O ports: 2 pins
    • Supports the output of a clock time base signal.
• Serial data I/O
    • Support CCB format communication with the system controller.
• Operating ranges
    • Supply voltage: 2.7 to 3.6V
    • Operating temperature: -40 to +85°C
• Package
    • MFP24SJ