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RS7111A

Home Networking Physical Layer Device with Integrated Analog Front End Circuitry

Conexant Systems 

LANfinity™ CN7221

Home Networking Physical Layer Device with

Integrated Analog Front End Circuitry

This document describes the CN7221 Home Networking Physical Layer

(PHY) with Integrated Analog Front End (AFE). It includes device pinouts,

signal descriptions, and timing diagrams. The CN7221 allows home

networks to operate over common telephone wires at 1 Mbps. The

CN7221 simplifies system designs and improves their reliability by

eliminating the need for a separate AFE comprised of discrete

components.

The CN7221 supports the emerging home phoneline networking standard

proposed by the Home Phoneline Networking Alliance (HomePNA).

Conexant has announced plans to release a family of multifunction home

phoneline networking chipsets. The first products to be announced in this

family include the RS7111A 1/10/100 PCI/CardBus Multifunction

Controller, the RS7220 Home Networking PHY, the RS7112 Multifunction

Controller with Integrated PHY, and the CN7221 Home Networking PHY

with Integrated AFE (see Ordering Information, page 2).

The HomePNA phoneline network utilizes existing telephone wiring to

connect computers and devices without interrupting phone service.

Industry-standard home networking products will enable a variety of home

computing opportunities including

• shared Internet access using a single phone line

• printer/peripheral sharing

• file and application sharing

• networked gaming

The CN7221 can be combined with the RS7112 Multifunction PCI/CardBus

Controller and Conexant’s host-controlled (HCF) V.90/K56flex modem to

provide a variety of home networking plus 56 Kbps modem solutions.

Features

• Supports the HomePNA 1.0 specification for

a home phoneline network

• 1 Mbps data rate

• Integrated Analog Front End

• Configurable transmit power level; high- and

low-power

• Configurable transmit data rate; low- and

high-speed

• 32-pin TQFP package

HomePNA 1.0 Specification

Features

• Meets HomePNA certification test

requirements

• Uses existing phonelines, no new wires

required

• Compatible with existing services

– Internet access, voice services, and

home network coexist on the same wire

• Robust protocol assures performance over

poor wiring infrastructure

• FCC Part 15- and Part 68-compliant

.

Data Sheet

Conexant Proprietary Information

Dissemination or use of this information is not permitted without the written permission of Conexant Systems, Inc.

Order No. LAN-056

Rev. A, March 12, 1999

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