LC72121MA中文资料PLL Frequency Synthesizers for Electronic Tuning数据手册ONSEMI规格书

描述 Description

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

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 technique)0.5 to 10 MHz (Direct division technique)
• IF counterIFIN: 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 7.2 MHz crystal element)1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 15, 25, 50, and 100 kHz
• Phase comparator :Supports dead zone control.Built-in unlocked state detection circuitBuilt-in deadlock clear circuitAn MOS transistor for an active low-pass filter is built in
• I/O ports :Output-only ports: 4 pinsI/O ports: 2 pinsSupports the output of a clock time base signal.
• Serial data I/O :Support 'computer control bus' format communication with the system controller.
• Operating rangesSupply voltage: 2.7 to 3.6 VOperating temperature: -40 to +85°C

简介

LC72121MA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LC72121MA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。