I347-AT4 Datasheet, PDF (11/148 Pages) Intel Corporation – Intel® Ethernet Network Connection I347-AT4 Datasheet

Introduction—I347-AT4
1.0
Note:
Introduction
The Intel^® Ethernet Network Connection I347-AT4 (I347-AT4) quad, single-chip device
contains four independent Gigabit Ethernet (GbE) transceivers on a single monolithic
Integrated Circuit (IC) that supports SGMII on the MAC interface in an SGMII-to-copper
application. Each transceiver performs all the Physical Layer (PHY) functions for
100BASE-TX and 1000BASE-T full- or half-duplex Ethernet on a CAT 5 twisted pair
cable, and 10BASE-T full- or half-duplex Ethernet on a CAT 3, 4, and 5 cable.
The I347-AT4 can also operate in dual-port mode. When set by the MAC, the I347-AT4
uses two independent GbE transceivers (Port 0 and Port 1) in an SGMII-to-copper
application.
The I347-AT4 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 calibrated resistor scheme achieves and
exceeds the accuracy requirements of the IEEE 802.3 return loss specifications.
The I347-AT4 consumes less than 500 mW per port; thereby, reducing overall system
cost by eliminating heat-sink and reducing air-flow requirements.
The I347-AT4 is fully compliant with the IEEE 802.3 standard. It includes the PMD,
PMA, and PCS sublayers and performs:
• PAM5, 8B/10B, 4B/5B, MLT-3, NRZI, and Manchester encoding/decoding
• Digital clock/data recovery
• Stream cipher scrambling/descrambling
• Digital adaptive equalization for the receiver data path as well as digital filtering for
pulse-shaping for the line transmitter
• Auto-negotiation and management functions.
The I347-AT4 also supports auto-MDI/MDIX at all three speeds to enable easier
installation and reduce installation costs.
The I347-AT4 uses advanced mixed-signal processing to perform equalization, echo
and crosstalk cancellation, data recovery, and error correction at a gigabit-per-second
data rate. The I347-AT4 dissipates very low power while achieving robust performance
in noisy environments.
In addition, the I347-AT4 supports a cable tester feature that enables fault detection
and advanced cable performance monitoring.
The I347-AT4 is available in a 15 mm x 15 mm, 196-pin TFBGA package.
1