Datasheet > LXT9880AHC

LXT9880AHC

更新时间： 2024-11-06 23:48:59

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Controller Miscellaneous - Datasheet Reference

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LXT9880AHC 数据手册

LXT9860/9880

Advanced 10/100 Repeater with Integrated Management

Datasheet

The LXT9880 is the next-generation repeater family, integrated with eight 10/100 transceivers.

The LXT9880 is compatible with previous generations of Intel repeaters from the LXT980 and

LXT918 families. Eight ports directly support 100BASE-TX/10BASE-T copper media. Two

additional Media Independent Interface (MII) ports (10/100 Mbps selectable) connect to Media

Access Controllers (MACs) for bridge/switch applications. The LXT9860 offers the same

features and functionality in a six-port device. This data sheet uses the singular designation

“LXT98x0” to refer to both devices.

The LXT98x0 provides auto-negotiation with parallel detection for the PHY ports. The

LXT98x0 provides two internal repeater state machines—one operating at 10 Mbps and one at

100 Mbps. Once configured, the LXT98x0 automatically connects each port to the appropriate

repeater. The LXT98x0 also provides two Inter-Repeater Backplanes (IRBs) for expansion —

one operating at 10 Mbps and one at 100 Mbps. Up to 240 twisted-pair and MII ports can

logically be combined into one repeater. The LXT98x0 supports SNMP and RMON

management via on-chip 32- and 64-bit counters. The counters and control functions are

accessible via a high-speed Serial Management Interface (SMI).

Product Features

■ Six or eight 10/100 ports with integrated

twisted-pair PHYs including integrated

filters.

■ High-speed Serial Management Interface

(SMI).

■ Two address-tracking registers per port.

■ Source Address matching function.

■ Two 10/100 MIIs for bridging.

■ Independent segments for 10 Mbps and

■ Integrated LED drivers with user-selectable

100 Mbps operation.

modes.

■ Cascadable Inter-Repeater Backplanes

(IRBs), with option for 5V stacking

compatibility.

■ Available in 208-pin QFP package.

■ Operating temperature range: 0-70°C,

ambient.

■ Hardware assist for RMON and the

■ Available in extended temperature range:

-40 to +85°C, ambient.

Repeater MIB.

For More Information…

Refer to “Section 1.0, “Other Related Documents…” on page 11” .

As of January 15, 2001, this document replaces the Level One document

known as Advanced 10/100 Repeater with Integrated Management.

Order Number: 248987-003

August 2001

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