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VSC8201 Datasheet Pcb Design And Layout Guide

Manufacturer: Vitesse

Overview: SimpliPHY® VSC8201 PCB Design and Layout Guide Single Port 10/100/1000BASE-Tand 1000BASE-X PHY Introduction This purpose of this application note in conjunction with the VSC8201 Datasheet is to provide information to assist in the design and layout of the VSC8201 Gigabit Ethernet Transceiver. Power Supply Organization and Decoupling The VSC8201 requires a 3.3v and a 1.5v power supply source for operation using GMII, MII or TBI MAC interfaces. In RGMII and RTBI modes, an additional 2.5v supply is needed as specified by the RGMI/RTBI standard. The VSC8201 can be powered using the following options: • • 2 separate supplies, 3.3v and 1.5v respectively. A single 3.3v supply. This is done by using the optional on-chip regulator control circuit, which drives a simple external series pass type supply regulator (MOSFET) to generate the 1.5v core power supply.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

Nominal Supply Voltage 3.3v/2.5v 3.3v 1.5v 1.5v 8mA Currenta Typ Max 11mA 111mA 48mA 423mA LQFP Supply Namesb VDDIO TXVDD, VDDREC33, VDDPLL33 VDDREC15, VDDPLL15 VDDDIG Digital Input/Output buffer supply Filtered analog 3.3v supply Filtered analog 1.5v supply Digital core supply 101mA 41mA 350mA a.

Test conditions: Room temperature (25oC), 1000BASE-T data, full duplex, minimum IPG, 64-byte packets, RGMII MAC active, excluding regulator power dissipation but including external twisted pair termination;

all worst case current figures have all nominal power supplies scaled by +5%.

Key Features

  • th a basic understanding of line matching will reduce signal reflections which.

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