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1893CF 参数 Datasheet PDF下载

1893CF图片预览
型号: 1893CF
PDF下载: 下载PDF文件 查看货源
内容描述: [Interface Circuit, 1-Trnsvr, CMOS, PDSO48, 0.300 MM INCH, SSOP-48]
分类和应用: 网络接口电信集成电路电信电路光电二极管
文件页数/大小: 136 页 / 1040 K
品牌: IDT [ INTEGRATED DEVICE TECHNOLOGY ]
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ICS1893AF Data Sheet - Release  
Chapter 4 Overview of the ICS1893AF  
Chapter 4 Overview of the ICS1893AF  
The ICS1893AF is a stream processor. During data transmission, it accepts sequential nibbles from its  
MAC (Media Access Control) converts them into a serial bit stream, encodes them, and transmits them  
over the medium through an external isolation transformer. When receiving data, the ICS1893AF converts  
and decodes a serial bit stream (acquired from an isolation transformer that interfaces with the medium)  
into sequential nibbles. It subsequently presents these nibbles to its MAC Interface.  
The ICS1893AF implements the OSI model’s physical layer, consisting of the following, as defined by the  
ISO/IEC 8802-3 standard:  
Physical Coding sublayer (PCS)  
Physical Medium Attachment sublayer (PMA)  
Physical Medium Dependent sublayer (PMD)  
Auto-Negotiation sublayer  
The ICS1893AF is transparent to the next layer of the OSI model, the link layer. The link layer has two  
sublayers: the Logical Link Control sublayer and the MAC sublayer. The ICS1893AF can interface directly  
to the MAC.  
The ICS1893AF transmits framed packets acquired from its MAC Interface and receives encapsulated  
packets from another PHY, which it translates and presents to its MAC Interface.  
Note: As per the ISO/IEC standard, the ICS1893AF does not affect, nor is it affected by, the underlying  
structure of the MAC/repeater frame it is conveying.  
ICS1893AF
Copyright © 2004, Integrated Circuit Systems, Inc.  
All rights reserved.  
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