SY89854U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 SY89854U is a 2.5V/3.3V precision, high-speed, fully differential 1:4 LVPECL fanout buffer. Optimized to provide four identical output copies with less than 20ps of skew and less than 10pspp total jitter, the SY89854U can process clock signals as fast as 2GHz.The differential input includes Micrel's unique, patent pending 3-pin input termination architecture that interfaces to any differential signal (AC or DC-coupled) as small as 100mV (200mVpp) without any level shifting or termination resistor networks in the signal path. For AC-coupled input interface applications, an on-board output reference voltage (VREF-AC) is provided to bias the center-tap (VT) pin. The outputs are 800mV LVPECL, with fast rise/fall times guaranteed to be less than 180ps.The SY89854U operates from a 2.5V ±5% supply or a 3.3V ±10% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89854U is part of Micrel's high-speed, Precision Edge® product line.

特性 Features

• Precision 1:4, LVPECL fanout buffer
• Low power: 137mW (2.5V typ)
• Guaranteed AC performance over temperature and supply voltage:
• DC- to >2GHz Clock fMAX
• <340ps tpd
• <180ps tr/tf time
• <20ps max. skew
• Ultra-low jitter design:
• <1psrms random jitter
• <10pspp deterministic jitter
• <10pspp total jitter (clock)
• Unique patent pending input termination and VT pin accepts DC-coupled and AC-coupled inputs (CML, PECL, LVDS)
• Typical 800mV (100k) LVPECL output swing
• Power supply 2.5V ±5% or 3.3V ±10%
• Industrial temperature range -40°C to +85°C
• Available in ultra-small (3mm x 3mm) 16-pin QFN package

简介

SY89854U属于集成电路（IC）的时钟缓冲器驱动器。由制造生产的SY89854U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。