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……