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ENGLISH DATASHEETS for Realtek RTL8208
Realtek RTL8208 (network chip)
Release: 1.3 from 2006-09-22
File: rtl8208b(f)-lf_datasheet_1.3.pdf
Downloaded: 830×
Designed only for Realtek RTL8208B-LF RTL8208BF-LF
The RTL8208B-LF and RTL8208BF-LF (jointly referred to as the RTL8208B(F)-LF) are single-chip highly integrated 8-port, 10Base-T/100Base-TX (FX) Ethernet transceivers implemented in 0.18μm CMOS technology. They are currently the world’s smallest Octal-PHY chip package. Realtek patented removal of traditional SD pins in 100Base-FX (RTL8208BF-LF only) allow us to obtain a lower pincount. Flexible hardware settings are provided to configure the various operating modes of the chip.

The RTL8208B(F)-LF provides 8 separate and independent channels. Each channel consists of an RMII/SMII/SS-SMII interface-to-MAC controller, and hardware pins are used to configure the interface for RMII, SMII, or SS-SMII mode. In RMII mode, another hardware pin is used to set Port-Pair Loopback mode (PP-LPBK MODE, RTL8208BF-LF only), which can extend physical transmission length and perform physical media transport operations without a switch controller.

A PECL (Pseudo Emitter Coupled Logic) receiver accepts input from a fiber transceiver and directly passed to a clock recovery circuit for data/clock recovery. The chip utilizes an advanced CMOS process to meet low voltage and low power requirements. With on-chip DSP (Digital Signal Processing) technology, the chip provides excellent performance under all operating conditions.

A built-in UTP cable tester diagnoses an open/short fault in an attached cable. The RTL8208B(F)-LF also features very low power consumption (maximum of 1.6W). Additionally, pin-outs are designed to provide optimized direct routing, which simplifies the layout work and reduces EMI noise issues.


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