SY89838U数据手册集成电路（IC）的时钟缓冲器驱动器规格书PDF

描述 Description

The SY89838U is a low jitter, low skew, high-speed 1:8 fanout buffer with a unique, 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89838U unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or \"runt\" pulses during switchover. In addition, a unique fail-safe input protection prevents metastable conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops below 200mV). The SY89838U distributes clock frequencies from 1kHz to 1.5GHz, guaranteed, over temperature and voltage.



The differential input includes Micrel's unique, 3-pin input termination architecture that allows customers to interface to any differential signal (AC- or DC-coupled) as small as 200mV (400MvPP) without any level shifting or termination resistor networks in the signal path. The outputs are 350mV compatible LVDS with fast rise/fall times guaranteed to be less than 150ps.The SY89838U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. For applications that require 800mV LVPECL outputs, consider the SY89837U. The SY89838U is part of Micrel's high-speed, Precision Edge® product line.

特性 Features

• Selects between two clocks, and provides 8 precision, low skew LVDS output copies
• 2:1 MUX input provides a glitch-free, stable LVDS output
• Guaranteed AC performance over temperature and supply voltage:
• Wide operating frequency: 1kHz to >1.5GHz
• <150ps tr/tf
• <40ps output-to-output skew
• Unique patent-pending input isolation design minimizes crosstalk
• Fail-safe input prevents oscillation
• Ultra-low jitter design:
• 150fs RMS phase jitter
• <0.7psRMS MUX crosstalk-induced jitter
• Unique patent-pending input termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
• 350mV LVDS output swing
• Power supply 2.5V ±5%
• -40°C to +85°C industrial temperature range
• Available in 32-pin (5mm x 5mm) QFN package

简介

SY89838U属于集成电路（IC）的时钟缓冲器驱动器。由制造生产的SY89838U时钟缓冲器，驱动器时钟缓冲器和驱动器集成电路产品族中的产品用于帮助信号在系统中传输，常用作频率/时间参考信号，以同步系统内的活动。尽管这些器件最常用到的功能就是缓冲（即，为使信号不受驱动负载的影响而从某个信号源复制信号），但是该产品族中的某些器件还能执行其他功能，例如选择性改变缓冲信号路径、按某个整数值分割信号频率，或进行所用电信号格式转换。