SY89467U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 SY89467U is a 2.5/3.3V, 1:20 LVPECL fanout buffer with a 2:1 differential input multiplexer (MUX). A unique Fail-Safe Input (FSI) protection prevents metastable output conditions when the selected input clock fails to a DC voltage (when voltage between the pins of the differential input drops significantly below 100mV).The differential input includes Micrel's unique, 3-pin internal termination architecture that can interface 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. The outputs are 800mV, LVPECL with fast rise/fall times guaranteed to be less than 270ps.The SY89467U operates from a 2.5V ±5% or 3.3V ±10% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89467U is part of Micrel's high-speed, Precision Edge® product line.

特性 Features

• Selects between two inputs, and provides 20 precision LVPECL copies
• Fail-Safe Input
• Prevents outputs from oscillating when input is invalid
• Guaranteed AC performance over temperature and supply voltage:
• DC-to >1.5 GHz throughput
• <1200ps Propagation Delay (In-to-Q)
• 270ps Rise/Fall times
• Ultra-low jitter design:
• <1psRMS random jitter
• <1psRMS cycle-to-cycle jitter
• <10psPP total jitter (clock)
• <0.7psRMS MUX crosstalk induced jitter
• Unique, patented MUX input isolation design minimizes adjacent channel crosstalk
• Unique patented internal termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
• Wide input voltage range: VCC to GND
• 2.5V ±5% or 3.3V ±10% supply voltage
• -40°C to +85°C industrial temperature range
• Available in 64-pin TQFP package

简介

SY89467U属于集成电路（IC）的时钟缓冲器驱动器。由制造生产的SY89467U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。