[ALASKA®]
PRODUCT OVERVIEW
The Marvell¨ Alaska¨ family of Gigabit Ethernet (GbE) over copper transceivers are the industryÕs lowest power, smallest form factor, highest performance, and highest port density solutions in volume production. Targeted at high-density GbE switches, the Alaska Quad transceivers are single-chip devices containing four independent GbE PHYs on a single monolithic IC. Each transceiver performs all of the physical layer functions for 100BASE-TX and 1000BASE-T full or half duplex Ethernet on category 5 (CAT 5) twisted pair cable, and 10BASE-T full or half duplex Ethernet on CAT 3, 4 and 5 cable. The Alaska Quad devices (88E1040S, 88E1041S and 88E1042H) offer additional support of 1000BASE-X through an integrated 1.25 GHz Serializer/Deserializer (SERDES).

FEATURES
• Highly integrated 4-port device
• Ultra low power, just exceeding 1W/port
• 10/100/1000BASE-T IEEE 802.3 compliant
• Supports GMII/RGMII/TBI/RTBI interfaces
• Virtual Cable TesterTM feature
• Integrated 1.25 GHz SERDES (881040S, 88E1041S, 88E1042H)
• Media Detect feature automatically detects and configures to either copper or fiber media
• Automatic support for 2-pair CAT 5 cable (100 Mbps)
• Power management modes
• Four RGMII timing modes
• User configurable independent Media Access Controller (MAC) interface select
• User programmable individual/group MDC/MDIO support
• Auto-MDI/MDIX crossover for all modes of operation
• Support IEEE 1149.1 (JTAG) and NAND-tree ICT
• Advanced mixed-signal and DSP techniques
• IEEE 802.3u compliant Auto-Negotiation
• Active internal hybrids for 1000BASE-T
• Direct drive LED support
• Software configurable LED support
• User programmable PHY address
• Loopback mode
• 0.15-micron standard digital CMOS process

APPLICATIONS
    The Marvell Alaska Quad GbE transceivers provide higher port count Gigabit switches, up to 48 ports, offering the industryÕs highest integration and lowest power dissipation. Through integrated SERDES technology, the devices also offer optional support for 1000BASE-SX/LX Gigabit fiber standards, on a per port basis, enabling mixed-media Gigabit switches. These devices support five different PHY/MAC interface options: GMII, RGMII, SGMII, TBI, and RTBI.