BCM5241
®
10/100BASE-TX SINGLE-CHANNEL TRANSCEIVER
FEATURES
•
10BASE-T/100BASE-TX/100BASE-EFX IEEE 802.3u fast
Ethernet transceiver
SUMMARY OF BENEFITS
•
DSP-based architecture to ensure performance over
temperature, voltage and process variation.
- Field proven in over one billion Fast Ethernet ports.
- Superior ability to link and lower BER in marginal cable
plants, relative to analog solutions.
- Greater ATE coverage results in fewer field failures.
Improved ease of use and installation, reduced support cost.
- Straight-through or cross-over cables accommodated
independent of installation.
- Advanced cable diagnostic features to enable remote
monitoring and debug of cabling infrastructure.
- Resistance to CESD to reduce product destruction and
product returns.
Flexible power supply options.
Low power and intelligent power management.
- Increased active working time.
- Prolonged battery life in active standby.
- Increased reliability.
Control of network interaction on start up.
•
HP auto-MDIX
•
Advanced cable diagnostics (CableChecker™)
•
Robust CESD tolerance
•
Operation from a single 3.3V or 2.5V supply source
•
Unique energy detect circuit
•
Low-power mode
•
Super isolate mode
•
Cable length up to 160 meters
•
MII and 7-wire serial interface
•
Power dissipation: <170 mW
•
•
•
•
BCM5241 System Diagram
CPU/ASIC
Media
Access
Controller
(MAC)
MII
BCM5241
Single-Channel
PHY Transceiver
RJ-45
Connector
Magnetics
Module
OVERVIEW
BCM5241
TD
±
Multimode
Xmt DAC
10BASE-T
PCS
4
TXD[3:0]
TXEN
TXC
Auto
MDIX
Baseline
Wander
Correction
10BASE-X
PCS
COL
RXC
CRS
RXDV
RXER
RD
±
ADC
Digital
Adaptive
Equalizer
4
Auto-Negotiation/
Link Intergrity
LED
Drivers
XTALI/REF_CLK
XTALO
RXD[3:0]
CRS/Link
Detection
LED1
LED2
Clock
Generator
Clock
Recovery
MII
Registers
MII
MGMT
Control
MDC
MDIO
RDAC
Bias
Generator
Modes
BCM5241 Reference Design
DSP-Based PHY Technology
The BCM5241 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 BCM5241 to achieve
high interoperability and to exhibit robust performance across voltage
(+/-10%), temperature, and process variations. Broadcom's DSP-based,
Broad-Φ™ technology has been proven in the shipment of over one
billion Fast Ethernet ports. Due to the significantly greater test coverage
for a DSP based PHY, Broadcom's PHYs exhibit superior quality with a
failure rate of well under 10 PPM.
Network Tolerance
The BCM5241 includes features that simplify the installation and
maintenance of local area networks. A simple help tool is the
CableChecker™, which enables basic cable issues to be resolved without
contacting technical support. These issues include not plugging the cable
correctly at one or both ends, identifying if the cable is damaged, or
determining if the remote system is powered up.
Another network tolerance feature is the HP Auto-MDIX capability,
which automatically detects and corrects crossed cables. With HP Auto-
MDIX, the installer does not need to know what is on the other end of the
network cable. The BCM5241 automatically switches its transmit and
receive circuitry to accommodate the link partner’s polarity.
Cable-sourced electrostatic discharge (CESD) is a recently discovered
phenomenon that occurs when an electrically charged network cable is
plugged into a networked product. This is an issue becoming more
prevalent with recent cable installations. The BCM5241 has been
designed and tested to withstand over 2KV of CESD, which unlike other
transceivers, prevents the device from being destroyed in a CESD event.
Low Power Fast Ethernet PHY
The BCM5241 has an extremely low power dissipation of less than 170
mW. It features an integrated voltage regulator, and can be supplied by
either 2.5V or 3.3V power sources. The BCM5241 employs several
intelligent power-down states that conserve power, while allowing
BCM5241-based products to automatically turn on when needed.
The BCM5241 includes a unique Intelligent Power-Management feature
that powers down the device if energy is not detected on the cable. This
feature is especially useful for portable and power-sensitive applications.
The BCM5241 can be set to periodically wake up at a user-defined
interval, allowing the device to initiate keep-alive network traffic. For
lowest power consumption, the BCM5241 can be put in a power-off state
(<170 mW).
Applications
• Printers, multi-function peripherals
• Game consoles
• IP Phones
• LAN on motherboard
• Wireless access points
• DTVs
Broadcom
®
, the pulse logo,
Connecting everything
®
, and the Connecting everything logo 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.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2006 by BROADCOM CORPORATION. All rights reserved.
5241-PB01-R
04/19/06
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
Analog electronics
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