SM844256数据手册集成电路（IC）的时钟发生器PLL频率合成器规格书PDF

描述 Description

The SM844256 provides a low-noise timing solution for high speed, high accuracy synthesis of clock signals. Common applications include SONET, Gigabit Ethernet, 10 Gigabit Ethernet, and similar networking standards.Power supplies of either 3.3V or 2.5V are supported, with superior jitter and phase noise performance. The device synthesizes different low noise LVDS output frequencies such as 125MHz, 156.25MHz, 312.5MHz, and 625MHz for Ethernet applications; 77.76MHz, 155.52MHz, 311.04MHz, and 622.08MHz for SONET applications. The crystal reference frequencies used include 25MHz and 19.44Mhz for Ethernet and SONET applications, respectively.The SM844256 is an excellent replacement for IDT Femto-clocks, with improved accuracy, power consumption, waveform integrity, and jitter.

特性 Features

• Generates six LVPECL outputs
• 2.5V or 3.3V operating range
• Typical phase jitter @ 125MHz
• (1.875MHz to 20MHz): 80 fs (typical) @ 3.3V
• 75MHz to 625MHz output frequencies
• Industrial temperature range
• Green, RoHS, and PFOS compliant
• Available in 24-pin TSSOP EPAD
• Operating supply modes:
• Core/Output
• 3.3V/3.3V, 3.3V/2.5

简介

SM844256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SM844256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。