SY89847U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 SY89847U is a 2.5V, 1:5 LVDS 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 (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 LVDS compatible with very fast rise/fall times guaranteed to be less than 210ps.The SY89847U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89847U is part of Micrel's high-speed, Precision Edge® product line.

特性 Features

• Selects between two sources, and provides 5 precision LVDS copies
• Fail-Safe Input
• Prevents outputs from oscillating when input is invalid
• Guaranteed AC performance over temperature and supply voltage:
• DC-to >1.5GHz throughput
• <1000ps Propagation Delay (IN-to-Q)
• <210ps Rise/Fall times
• Ultra-low jitter design:
• 150fsRMS phase jitter (typ.)
• <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% supply voltage
• -40°C to +85°C industrial temperature range
• Available in 32-pin (5mm x 5mm) QFN package

简介

SY89847U属于集成电路（IC）的时钟缓冲器驱动器。由制造生产的SY89847U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。