Datasheet > Alaska G 1780

Alaska G 1780

更新时间： 2024-03-03 10:10:56

品牌	Logo	应用领域
迈威 - MARVELL		局域网（LAN）标准
页数	文件大小	规格书
2页	89K
描述
10/100/1000 BASE-T PHY，8 端口，EEE，USGMII 接电口收发器

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Alaska G 1780 数据手册

Product Brief

Marvell^®88E1780 Octal-Port 1GbE copper PHY

Integrated Octal Ports 10/100/1000 Mbps Energy Efﬁcient Ethernet Transceiver with USGMII

Interface

Overview

The latest generation Alaska® family of single-chip devices

contains eight independent Gigabit Ethernet transceivers on a

single monolithic IC. Each transceiver performs all the physical

layer functions for 1000BASE-T and 100BASE-TX full or

half-duplex Ethernet on CAT5 twisted pair cable, and 10BASE-T

full or half-duplex Ethernet on CAT 3, 4, and 5 cable.

The device integrates MDI interface termination resistors and

capacitors into the PHY. This resistor integration simpliﬁes

board layout and lowers board cost by reducing the number of

external components. The new Marvell calibrated resistor

scheme will achieve and exceed the accuracy requirements of

the IEEE 802.3 return loss speciﬁcations. The device consumes

ultra-low power. This reduces the overall system cost by

eliminating heat-sink and reducing air-ﬂow requirements.

The Alaska device supports the Universal Serial Gigabit Media

Independent Interface (USGMII) for direct connection to a MAC/

Switch port. The USGMII combines eight ports of SGMII running

at 1.25 Gbps onto a single differential-pair of signals operating

at 10 Gbps. USGMII primarily decreases the number of I/O pins

on the MAC interface compared to SGMII and lowers the overall

power consumption. The device supports one USGMII port to

connect the eight copper ports to the MAC device.

The device supports Auto-MDI/MDIX at all three speeds to

enable easier installation and reduces installation costs.

The device also supports integrated Advanced Virtual Cable

Tester® (VCT™) enabling fault detection and advanced cable

performance monitoring.

The device supports IEEE 802.3az Energy Efﬁcient Ethernet

(EEE) and is IEEE 802.3az compliant.

Block Diagram

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Octal 10/100/1000 Mbps ꢀu

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