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The Marvell 88E1781-A0-LKJ2C000 is a high-performance, eight-port 10/100/1000Mbps Ethernet physical layer transceiver designed for applications requiring high power efficiency and time-sensitive networking (TSN) support. With support for IEEE 1588v2 and Synchronous Ethernet (SyncE), the chip is suitable for use in industrial automation, communications equipment, and smart grid applications.

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 CAT 5 twisted pair cable, and 10BASE-T full or half-duplex Ethernet on CAT 3, 4, and 5 cable. The Alaska E1781 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 the 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 IEEE 802.3az Energy Efficient Ethernet (EEE) and is IEEE 802.3az compliant.

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 exhibits ultra-low power consumption. This reduces the overall system cost by reducing or eliminating heat-sink and air-flow requirements.

Features

Eight ports of copper to one port of USGMII

Energy Efficient Ethernet (EEE) - IEEE 802.3az compliant

Clock cascading

Supports Interspersed Express Traffic (IET) and Preemption frame format

Accurate time stamping via PCH with 2 ns resolution and Synchronous Ethernet support

Temperature sensor

Ultra-low power consumption

Supports commercial and industrial temperature ranges

Manufactured in a: 14 x 14 mm 289-Pin FCBGA package

Benefits

Enables high density 1G port configuration (8/16/24/48)

Optimized power consumption in idle mode

BOM cost reduction

Aligned with Time Sensitive Network requirements

Helps to manage system thermal behavioral

Reduced BOM cost, robust thermal performance

Dedicated P/N for different temperature range needs

FCBGA package is optimized to harsh Industrial environment requirements

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