RTL8309N 데이터 시트보기 (PDF) - Realtek Semiconductor

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RTL8309N

SINGLE-CHIP 8-PORT 10/100MBPS ETHERNET SWITCH CONTROLLER

Realtek Semiconductor 

RTL8309N

Datasheet

1. General Description

The RTL8309N is an 8-port Fast Ethernet switch controller that integrates eight MACs, and eight

physical layer transceivers for 10Base-T and 100Base-TX operation into a single chip.

The RTL8309N contains a 2K-entry address lookup table. Two 4-way associative hash algorithms avoid

hash collisions and maintain forwarding performance.

Maximum packet length can be 2K bytes. Three types of independent storm filters are provided to filter

packet storms, and an intelligent switch engine prevents Head-of-Line blocking problems.

The RTL8309N supports 16 VLAN groups. These can be configured as port-based VLANs and/or

802.1Q tag-based VLANs. The RTL8309N also supports four Independent VLAN Learnings (IVLs).

The RTL8309N supports several advanced QoS functions with four-level priority queues to improve

multimedia or real-time networking applications, including:

• Multi-priority assignment

• Differential queue weight with WRR and SP packet scheduling

• Port-based and queue-based rate limitation

Energy-Efficient Ethernet (EEE) supports Low Power Idle Mode. When Low Power Idle Mode is enabled,

systems on both sides of the link can disable portions of the functionality and save power during periods

of low link utilization.

The RTL8309N provides per-port one flexible LED functions for diagnostics, with five combination

modes.

A loop-detection function provides notification of network loops, the loop status can be notified by

buzzer, LED or both.

To simplify the peripheral power circuit, the RTL8309N integrated one LDO regulator to generate 1.0V

from a 3.3V input power which needs only one external Diode.

8-Port 10/100Mbps Ethernet Switch Controller

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Track ID:

Rev. 1.0

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