LC72121中文资料PLL 频率合成器，用于电子调谐数据手册ONSEMI规格书

描述 Description

LC72121 是一款高输入灵敏度（130 MHz 时 20 mVrms）PLL 频率合成器，用于 3 V 系统。该集成电路与 LC72131 可实现串行数据兼容，并具有高性能 AM/FM 调谐器所需的更高输入灵敏度和更低杂散辐射（由重新设计的接地系统提供）。

特性 Features

• High-speed programmable dividerFMIN: 10 to 160 MHz ... Pulse swallower technique(With built-in divide-by-2 prescaler)AMIN: 2 to 40 MHz ... Pulse swallower technique0.5 to 10 MHz ... Direct division technique
• IF counterIFIN: 0.4 to 15 MHz ... For AM and FM IF counting
• Reference frequencyOne of 12 reference frequencies can be selected(using a 4.5 or 7.2 MHz crystal element)1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 15, 25, 50, and 100 kHz
• Phase comparatorSupports dead zone control.Built-in unlocked state detection circuitBuilt-in deadlock clear circuit
• An MOS transistor for an active low-pass filter is built in.
• I/O portsOutput-only ports: 4 pinsI/O ports: 2 pinsSupports the output of a clock time base signal.
• Operating rangesSupply voltage: 2.7 to 3.6 VOperating temperature: -40 to 85°C

应用 Application

PLL frequency synthesizer for 3 V systems

简介

LC72121属于集成电路（IC）的时钟发生器PLL频率合成器。由制造生产的LC72121时钟发生器，PLL，频率合成器时钟发生器、PLL 和频率合成器集成电路 (IC) 可为逻辑器件提供参考信号的稳定定时脉冲，这些器件包括计算机、微控制器、数据通信系统和图形/视频发生器。这些集成电路可能包括缓冲器、驱动器、分频器、倍频器、多路复用器、合成器、扇出分配器和预分频器。