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