88E3082 Datasheet, PDF (1/2 Pages) –

Marvell Alaska 88E3082/88E3083
Integrated 8-Port 10/100BASE-T Fast Ethernet Transceivers
PRODUCT OVERVIEW
The Marvell^® Alaska^® 88E3082 and 88E3083 are third-generation Marvell DSP-based 8-port 10/100BASE-T Fast Ethernet
(FE) transceivers. They offer the industry’s lowest power consumption at only 150mW per port, resulting in higher port
density, lower cost FE switches. Additionally, the 88E3082 and 88E3083 integrate the industry’s most advanced FE
transceiver feature set, such as Marvell’s Virtual Cable Tester^® (VCT™) technology for remote cable diagnostics and
support for very low power modes.
The Alaska 88E3082 and 88E3083 contain all of the active circuitry to convert data streams to and from eight Media Access
Controllers (MACs) and to and from the physical media. In addition, both devices incorporate IEEE 802.3u Auto-Negotiation
in support of both 100BASE-TX and 10BASE-T networks over twisted-pair cable in full-duplex or half-duplex mode.
To reduce the number of input/output (I/O) pins between the MAC and the Physical Layer (PHY), the 88E3082 supports the
Reduced Media Independent Interface (RMII), the Serial Media Independent Interface (SMII), and the source-synchronous
option of SMII (SSSMII). The SSSMII interface extends the allowed PCB trace distance between the PHY and the MAC, thereby
facilitating more robust, higher port density FE switch designs. The 88E3083 supports the SMII and SSSMII interfaces.
The 88E3082 also features a mode of operation supporting IEEE-compliant 100BASE-FX fiber-optic networks. The device
includes a PECL interface that is selectable on a per-port basis for 100BASE-FX applications. The 88E3083 supports
100BASE-FX fiber on a single port.
BLOCK DIAGRAM
Fig 1. 88E3082 (Single-Port) Functional Block Diagram
Fig 2. 88E3082/88E3083 System Diagram