CN7221 Datasheet, PDF (1/18 Pages) Conexant Systems, Inc – Home Networking Physical Layer Device with Integrated Analog Front End Circuitry

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