模拟开关多路复用SFP模块

摘要：为了避免多个I ² C总线的主人，在电信或数据通信系统与SFP模块，添加一个模拟多路复用器（ MAX4572 ），指示相应的SFP模块的数据线。

Maxim > App Notes > Communications circuits
Keywords: analog switches, I2C bus, MDIO interface, SFP modules Dec 23, 2010

APPLICATION NOTE 4552
Analog Switch Multiplexes SFP Modules
By: Kevin Bilke
Nancy Xiong


Abstract: To avoid multiple IC bus masters in a telecom or data-communications system with SFP modules, add an analog
multiplexer (MAX4572) that directs the data line to the appropriate SFP module.

A similar version of this article appeared in the August 2, 2007 issue of Electronic Design magazine.

Small-form-factor pluggable modules (SFP modules) are in common use for the physical-layer interface in telecom and data-
communications equipment. Also common in these systems is an IC bus for the MDIO interface (Management Dat