BCM5461S ETC, BCM5461S Datasheet - Page 2

• Manufacturer Part Number: BCM5461S
• Description: 10/100/1000 BASE T GIGABIT COPPER TRANSCEIVER
• Manufacturer: ETC

The BCM5461S is a fully integrated 10/100/1000BASE-T Gigabit
Ethernet transceiver optimized for low power and small footprint size to
enable backplane and uplink applications. By lowering system cost and
reducing power dissipation by nearly 30%, the BCM5461S enables a
new class of cost-effective Gigabit Ethernet equipment, driving the
delivery of Gigabit bandwidth to the desktop.
The BCM5461S’s Digital Signal Processor-based architecture and
advanced power management techniques combine to achieve robust and
low-power operation over the existing CAT 5 twisted-pair wiring. The
BCM5461S architecture also meets the requirements of 802.3, 802.3u,
and 802.3ab, but maintains the industry’s highest level of margin over
IEEE requirements for Echo, NEXT, and FEXT. Low power is a key
factor in implementing Gigabit small form factor NICs and uplinks and,
at less than 700 mW per port, the BCM5461S has the industry's lowest
power requirement. For NIC applications, support for Wake on LAN
enables compliance with PCI 2.2 and PC99/PC2000. Also, the
BCM5461S has extremely low EMI emissions, which reduces the design
constraints required to meet EMI emission specifications.
The BCM5461S supports GMII, RGMII, SGMII, SerDes, TBI, RTBI,
and MII MAC interfaces. A unique feature of the BCM5461S is its
ability to support both copper and fiber networks, with an integrated
SerDes PHY interface that can connect directly to a fiber-optic module.
Switching between copper and fiber media can be accomplished either
automatically or through software control. The BCM5461S monitors
copper link and fiber signal detect status and, based on priorities set at
Broadcom
or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the
property of their respective owners.
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
5461S-PB05-R
®
, the pulse logo, and Connecting everything
04/19/04
TRD [0:3]+
XTALO
XTALI
RDAC
®
Negotiation
8
Generator
PGA
Generator
Auto-
Clock
Bias
Automatic
TX DAC
Control
®
Gain
are trademarks of Broadcom Corporation and/
ADC
BCM5461S Block Diagram
Canceller
Echo
FFE
O V E R V I E W
Registers
MII
Canceller
Timing &
Decoder
Recovery
XTALK
Trellis
Phase
DFE/
X3
initialization, automatically swaps either copper traffic or fiber traffic to
the MAC/switch.
This device is another member of Broadcom's 0.13µ Gigabit copper PHY
family, joining the BCM5404, BCM5414, BCM5421, BCM5421S,
BCM5424, BCM5434, BCM5464, and BCM5464S. The 0.13µm
process is the optimal process that offers the best performance, lowest
cost, and lowest power for Gigabit copper solutions. Further, devices
based on the 0.13µ process offer an excellent long-term cost curve,
enabling better cost reduction over time compared to older technologies,
without having to redesign or requalify a new part.
The BCM5461S incorporates a number of advanced features. A link
quality indicator LED provides instant notification of any problems with
the wiring plant operating at the desired speed. This includes physical
wiring defects that the BCM5461S cannot automatically correct and
channel conditions such as excessive cable length, and return loss,
crosstalk, echo, and noise. Broadcom’s cable analyzer software can be
used with the device to provide remote management of the cable and a
first level of diagnostics and fault isolation.
The BCM5461S also has ESD tolerance that exceeds typical industry
standards. This prevents ESD damage during manufacturing and during
CESD events in the field. Cable-sourced electrostatic discharge (CESD)
is an ESD event that occurs when an electrically charged network cable
is plugged into a network port-an issue becoming more prevalent with
contemporary cable installations.
Control
MGMT
MII
Symbol
Drivers
Symbol
Encoder
Aligner
SerDes/
SGSMII
LED
MUX
8
SGIN±
SCLK±
SGOUT±
TX_ER
GTX_CLK
Modes
TXD[7:0]
TX_CLK
Link[1]
RCVLED
XMTLED
FDXLED
INTR
TX_EN
Link[2]
MDC
MDIO
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com