Datasheet > 88E1121R

88E1121R

更新时间： 2024-11-11 06:33:39

品牌	Logo	应用领域
迈威 - MARVELL		以太网
页数	文件大小	规格书
2页	195K
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Dual-Port Gigabit Ethernet Transceiver with Integrated Passives

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88E1121R 数据手册

Marvell Alaska 88E1121R

Dual-Port Gigabit Ethernet Transceiver with Integrated Passives

PRODUCT OVERVIEW

The Marvell^®Alaska^®88E1121R dual-port Gigabit Ethernet (GbE) transceiver is a physical layer (PHY) device containing

two independent GbE transceivers on a single monolithic IC. The transceivers implement the Ethernet PHY portion of the

1000BASE-T, 100BASE-TX, and 10BASE-T standards and are compliant with IEEE 802.3u Auto-Negotiation. It is manufactured

using standard digital CMOS process and contains all the active circuitry required to implement the physical layer functions

to transmit and receive data on standard CAT 5 unshielded twisted pair.

The 88E1121R device supports the Reduced Gigabit Media Independent Interface (RGMII) for direct connection to a Media

Access Controller (MAC)/switch port. The device also integrates Media Dependent Interface (MDI) termination resistors and

capacitors into the PHY. The integration of the passives simpliﬁes board layout and signiﬁcantly reduces board cost and space

by eliminating up to 24 external components. The Marvell calibrated resistor scheme will achieve and exceed the accuracy

requirements of the IEEE 802.3 return loss speciﬁcations.

The 88E1121R can operate with just two voltages, 1.2V for the core and 1.8V/2.5V/3.3V for I/O. It consumes only 700 mW

per port and features energy detect and energy detect+^™low-power modes. It supports data terminal equipment (DTE)

power function for Power over Ethernet (PoE) applications. The device also incorporates the advanced Marvell Virtual Cable

Tester^®(advanced Marvell VCT^™) feature for remote identiﬁcation of potential cable malfunctions, thus reducing equipment

returns and service calls. Housed in a 100-pin TQFP package and measuring only 16mm x 16mm on each side, the 88E1121R

is the smallest dual-port Gigabit Ethernet PHY on the market.

Example Application: IP Phone

Example Application: DVR

APPLICATIONS

The 88E1121R is ideal for IP phones and other applications requiring low power and a small footprint. In an IP phone, where

board space is constrained, the integrated resistor scheme on the 88E1121R allows for shorter MDI traces and thus improved

IEEE template performance. Other beneﬁts of the integrated passives on the 88E1121R include: higher reliability with fewer

components on the board, reduced board assembly time and cost, better ICT yield from the elimination of board soldering

issues, and improved signal integrity and potential reduction in EMI with terminations located at the very end of the signal path.

Additional applications include DVRs, game consoles, NAS appliances, and workstation or desktop PCs. The 88E1121R is a

drop-in replacement for the 88E1121 PHY and can be used to upgrade existing designs without the need to re-spin the board.

Fig 1. 88E1121R Application Diagram

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与88E1121R相关器件

型号	品牌	获取价格	描述	数据表
88E1141	MARVELL	获取价格	Gigabit Ethernet Transceiver
88E1145	MARVELL	获取价格	Gigabit Ethernet Transceiver
88E1180	ETC	获取价格	Alaska? Octal 88E1180 (Octal-Port) Transceiver
88E3015	MARVELL	获取价格	Single-Port Fast Ethernet Transceivers
88E3016	MARVELL	获取价格	Single-Port Fast Ethernet Transceivers
88E3018	MARVELL	获取价格	Single-Port Fast Ethernet Transceivers
88E3082	MARVELL	获取价格	Integrated 8-Port 10/100BASE-T Fast Ethernet Transceivers
88E3083	MARVELL	获取价格	Integrated 8-Port 10/100BASE-T Fast Ethernet Transceivers
88E6060	MARVELL	获取价格	6-Port Fast Ethernet Switch 6端口快速以太网交换机
88E6063	ETC	获取价格	7-Port Fast Ethernet Switch with 802.1Q

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