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Ultra-low power gigabit PHY device

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article image National’s fifth generation gigabit PHY device.

NATIONAL Semiconductor, distributed by Arrow Electronics , has launched an ultra-lower power gigabit Ethernet physical layer transceiver that provides a solution for enterprise switches and routers.

The new GigPHYTER V device delivers gigabit per second (Gbps) performance, low power consumption and a low unit price.

National Semiconductor has a twenty-year history of Ethernet innovation. This latest device is the company's fifth generation gigabit physical layer (PHY) device.

A single channel Ethernet PHY supporting 10BASE-T, 100BASE-TX and 1000BASE-T Ethernet protocols, the GigPHYTER V device ensures a smooth migration path from existing Fast Ethernet applications.

The device's design has achieved a dramatically reduced die size compared to traditional architectures.

For example, its analog front end processing minimises the data bus width needed throughout the chip while maximising dynamic range. This in turn reduces the complexity and size of the digital signal processing required.

In addition, through the use of advanced power management techniques, the GigPHYTER V device typically consumes only 1.1W, and does not need thermally enhanced packaging.

National's GigPHYTER V device is designed for easy implementation of 10/100/1000 Mpbs Ethernet LANs. It interfaces directly to twisted pair media via an external transformer.

The device also interfaces directly to the media access controller (MAC) layer through the IEEE 802.3u Standard Media Independent Interface (MII) and the IEEE 802.3z gigabit GMII.

The cable length performance exceeds IEEE requirements to provide headroom and tolerance for lower quality network cable.

The device features IEEE 802.3u auto-negotiation and parallel detection for seamless plug-and-play configuration. It requires only two power supplies, 1.8 V for core and analog and 2.5 V for analog and I/O.

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