bcm5481 Broadcom Corp., bcm5481 Datasheet - Page 2

• Manufacturer Part Number: bcm5481
• Description: Bcm5481 - 10/100/1000base-t Gigabit Copper Transceiver
• Manufacturer: Broadcom Corp.

The BCM5481 is optimized for low power and small footprint size to
enable uplink and general Gigabit Ethernet connectivity applications. By
lowering system cost and reducing power dissipation, the BCM5481
enables a new class of cost-effective Gigabit Ethernet equipment,
driving the delivery of Gigabit bandwidth to the desktop.
The BCM5481 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
BCM5481 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 BCM5481 has the industry's lowest
power. Also, the BCM5481 has extremely low EMI emissions, which
reduces the design constraints required to meet EMI emissions
specifications.
In addition to supporting the IEEE 802.3™ standard Gigabit Media
Independent Interface (GMII), the BCM5481 also supports the reduced
gigabit media independent interface (RGMII). RGMII is a reduced pin-
count (12 versus 25) version of the GMII. The small package, multiple
MAC interfaces, and streamlined power supply lowers system cost and
simplifies the system and board level design.
Broadcom
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
5300 California Avenue,
Irvine, California 92617
© 2007 by BROADCOM CORPORATION. All rights reserved.
5481-PB00-R
®
, the pulse logo, Connecting everything
04/03/07
REG_OUT[1:2]
REGSENSE[2]
REGSUP[1:2]
TRD[0:3]±
REGBIAS
XTALO
XTALI
RDAC
®
8
PGA
NEGOTIATION
GENERATOR
GENERATOR
REGULATOR
VOLTAGE
CLOCK
AUTO-
BIAS
®
TXDAC
, and the Connecting everything logo are among
CORRECTION
BASELINE
WANDER
ADC
BCM5481 Reference Design
O V E R V I E W
CANCELLER
REGISTERS
ECHO
FFE
MII
This device is another member of Broadcom's 0.13µ Gigabit copper
PHY family, joining the BCM5461, BCM5461S, BCM5464,
BCM5464S, BCM5482, BCM5482S, BCM5488, and BCM5488S. The
0.13 µm 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 BCM5481 incorporates a number of advanced features. The link
quality indicator LED provides installers with immediate visual
notification of any problems with the wiring plant supporting operation
at the desired speed. This includes physical wiring defects that the
BCM5481 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 first-level diagnostics and
fault isolation.
The BCM5481 also has ESD tolerance that exceeds typical industry
standards. This prevents ESD damage not only during manufacturing but
also during cable-sourced electrostatic discharge (CESD) events in the
field. 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.
CANCELLER
RECOVERY
DECODER
TIMING &
TRELLIS
PHASE
XTALK
DFE/
CONTROL
x3
MGMT
MII
DECODER/
ENCODER
DRIVERS
SYMBOL
ALIGNER
SYMBOL
LED
8
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com
CLK125
TXD[7:0]
TX_EN
TX_ER
GTX_CLK
TXC
COL
CRS
RXC
RX_DV
RX_ER
RXD[7:0]
ANEN (LED1)
FDX (LED2)
SPD0 (LED3)
F1000(LED4)
MDC
MDIO