Brief
BCM5221
®
10/100BASE-TX/FX Mini-Φ™ Transceiver
Embedded 10/100 BASE-TX Application
•Power Supply: 2.5V or 3.3V
•Integ r ated vol tage regulator to allow operation f rom a single
supply source
•Power Consumption: <175 mW
•
Unique energy detection circuit to enable intelligent power management
•HP Auto-MDIX
•Cable length indication
•Cable noise level indication
•Robust CESD tolerance
•Cable length greater than 145 meters
•Well under 10 PPM defect ratio quali ty
•±10% voltage tolerance
•
Industrial temperature range (–40°C to 85°C) package options
available
•MII and RMII configurab le
•IEEE 1149.1 (JTAG) scan chain support
•MII management via serial port
•Layout compatible with BCM5201
•10BASE-T/100BASE-TX/FX IEEE 802.3u
Fast Ethernet transceiver
•Glueless TX-to-FX media conversion
•64-pin TQFP with 64-pin BGA package, 48-pin KML package;
RoHS 5/6 and 6/6 package options available
•Low power and intelligent power management
•Increased active working time
•Prolonged batter y life in a ctive standby
•Increased reliability
•Improved ease of use and installation, reduced support cost
•
Straight-through or crossover cables are accommodated, and such
accommodation is independent of installation
•Advanced cable diagnostic features to enable remote
monit oring and debug of cabling infrastructure
•Resistance to cable-sourced elect rostat ic disch arge (CESD) to
reduce product destruction and pro duct returns
•DSP-based Signi-PHY™ architecture to ensure performance
over temperature, voltage, and process variation
•Proven in over two billion Fast Ethernet ports
•Eas e of manufac turing with JTAG support
•Fully integrated TX/FX PHY transceiver (MII/RMII-to-TX
magn etics or FX opt i cs )
•Lower system cost
•Simplified system and b oard design
FEATURES SUMMARY OF BENEFITS
APPLICATIONS
•Servers - Network Controller - Sideband Interface (NC-SI)
using RMII interface
•Digital T V, PCMCIA/C ardBus card s, LAN on motherboar d
(LOM), IP phones, cable modems, set-top boxes and print
servers, wireless access points, and embedded telecom
RJ-45
Connector
MII/RMIISystem Bus Media
Access
Controller
(MAC)
CPU
Magnetics
Module
SRAM
BCM5221
10/100 BASE-TX
Single-Channel
PHY Transceiver
OVERVIEW
®
Phone: 949-926-5000
Fax: 949-926-5203
E-mail: info@broadcom.com
Web: www.broadcom.com
BROADCOM CORPORATION
5300 California Avenue
Irvine, California 92617
© 2008 by BROADCOM CORPORATION. All rights reserved.
5221-PB06-R 04/11/08
Broadcom®, the pulse logo, Connecting everyt hing®, the Connecting everything logo, Signi-PHY™,
and Digi- ™ are among the trademarks of Broadcom Corporation and/or its affiliates in the United
States, certain other countries and/or the EU. Any other trademarks or trade names mentioned are the
property of their respective owners.
Φ
BCM5221 Block Diagram
The BCM5221: Lowe st-Power F ast Eth ernet PHY
With a power dissipation of 175 mW, the BCM5221 is the industry’s
lowest-power Fast Ethernet PHY. It features an integrated voltage
regu lato r, and ca n be s uppl ied by either a 2.5V or 3. 3V pow er sou rc e. In
addition, the BCM5221 has several intelligent power-down states that
conserve power, yet allow products based on it to automatically turn on
when needed.
The BCM5221 includes a unique Intelligent Power-Management feature
that powers down the device if energy i s not det ected on t he cable. This
feature is especially useful for portable and power-sensitive applications
such as laptop LAN card adapters. The BCM5221 allows PCMCIA or
CardBus adapters to remain plugged in and draw virtually no energy
even if the client is no longer connected to the network. Because most
laptop users do not remove their LAN PC card when working remotely,
this feature results in a noticeably extended battery life for laptop
computer users.
The BCM5221 can be set to periodically wake up at a user-defined
interval, allowing the product to initiate keep-alive traffic on the
networ k. For lo west po wer consu mption , the BCM52 21 can b e put in a
power-off state (<2.5 mW).
Network Tolerance
The BCM5221 includes features that simplify the installation and
maintenance of local area networks. One such feature is the HP Auto-
MDIX capability, which automatically detects and corrects crossed
cables. W ith HP Auto -MDIX, the in staller do es not need to know what
is on the other end of the network cable: the BCM5221 automatically
switches its transmit and receive circuitry to accommodate the link
partner’s polarity.
CESD is a recently discovered phenomenon that occurs when an
elect rically charged network cable is plugged into a networked product,
an issue becoming more prevalent with recent cable installations. The
BCM5221 has been designed and tested to withstand over 5 KV of
CESD whic h, un like o ther transce ivers, preve nts the devi ce fro m being
destroy e d in a C ESD ev e nt.
DSP-Based PHY Technology
The BCM5221 builds on Broadcom's proven DSP PHY design and full
custom circuit design techniques to create a highly integrated and robust
physical layer solution. DSP techniques allow the BCM5221 to achieve
high interoperability and to exhibit robust performance across voltage
(±10%), temperature (–40°C to 85°C), and process variations.
Broadcom's DSP-based, Digi- ™ technology has been proven in the
shipment of over two billion Fast Ethernet ports. Broadcom's superior
quality has resulted in a failure rate well under 10 PPM.
Applications
Application s fo r th e BCM5 22 1 th at take a d vant ag e o f its l ow p ower a nd
high netwo r k tole ra nc e :
SD
•Servers - Network Controller - Sideband
Interface (NC-SI) using RMII interface •Cable modems
•Digital TV •Set-Top boxe s
•PCMCIA/CardBus cards •Print servers
•LAN on motherboard (LOM ) •W ire less Access Points
(WAP)
•IP ph ones •Embedded telecom
Φ
