BOARDCOM BCM5421SA2KPF

BCM5421S
®
10/100/1000BASE-T GIGABIT COPPER TRANSCEIVER WITH SERDES
SUMMARY OF BENEFITS
FEATURES
• Fully integrated 10BASE-T/100BASE-TX/1000BASE-T
Gigabit Ethernet transceiver with SerDes
• MII, GMII, TBI, RGMII, RTBI, SGMII, and MAC SerDes
interface options
• Line-side copper and fiber interface options
• On-chip low voltage regulators
• Fully compliant with IEEE 802.3, 802.3u, and 802.3ab
standards
• 0.13-µm CMOS — low power and cost
• Low power
• 1W per port
• Wake on LAN support
• Advanced power management
• Low EMI emissions
• [email protected] logic automatically selects the
maximum speed based on channel conditions
• Cable plant diagnostic
• Cable plant analyzer function detects cable plant impairments
• Link quality indication LED
• Automatic detection and correction of wiring pair swaps,
pairskew, and pair polarity
• Automatic MDI/MDIX crossover at all speeds
• Robust CESD tolerance
• Support for jumbo packets up to 9 KB
• IEEE 1149.1 (JTAG) boundary scan
• 117-pin BGA and 128-pin MQFP packages
10/100/1000BASE-T GBIC Module
• Provides triple-speed operation for compatibility with legacy
networks.
• Simplifies system and board design.
• RGMII/RTBI reduces I/O pin requirement over GMII and TBI
by more than 50%.
• SGMII further reduces the interface to six pins, while the serial
• MAC SerDes interface requires only four pins.
• Lowers system cost and reduces solution footprint.
• Provides interoperability with IEEE standard device
operation at 10, 100 and 1000 Mbps at half- and full-duplex.
• Requires no airflow or heatsink.
• Provides compliance with PCI 2.2 and PC99/PC2000.
• Reduces system design constraints to meet EMI emissions
standards.
• Automatically configures the link to support the highest
possible speed based on link partner capability and
characteristics of the channel.
• Cable diagnostic function characterizes cable plant condition
and immediately indicates cabling issues.
• Prevents erroneous equipment return due to bad cable plants.
• Prevents manufacturing fall-out due to bad cable plants.
• High CESD tolerance prevents equipment damage and return.
• Operates with larger packets for wider range of packet
protocol support and improved efficiency.
• Ease of manufacturing with JTAG support, simplified power
supply, and multiple MAC interfaces.
1000BASE-T Gigabit Copper or Fiber Uplink
GBIC
Module
BCM5605
BCM5421S
Switch/MAC
Optical
Module
Transformer
RJ-45
RJ-45
BCM5421S
SerDes
Transformer
GBIC Connector
BCM5228
BCM5228
BCM5228
OVERVIEW
8
Symbol
Encoder
TX DAC
TXD[7:0]
TX_EN
TX_ER
GTX_CLK
TX_CLK
MUX
Echo
Canceller
XTALK
Canceller
X3
Gain
Automatic
Control
TRD [3:0]+
PGA
ADC
XTALO
RDAC
SGIN±
SGSMII
DFE/
Trellis
Decoder
FFE
AutoNegotiation
XTALI
SERDES/
Symbol
Decoder/
Aligner
Timing &
Phase
Recovery
8
LED
Drivers
Clock
Generator
Bias
Generator
MII
MGMT
Control
MII
Registers
SCLK±
SGOUT±
COL
CRS
RX_CLK
RX_DV
RX_ER
RXD[7:0]
Link[2]
Link[1]
RCVLED
XMTLED
FDXLED
MDC
MDIO
INTR
Modes
The BCM5421S is a fully integrated 10/100/1000BASE-T Gigabit
Ethernet transceiver. The BCM5421S is optimized for low power and
small footprint size to enable GBIC, copper, and fiber applications. By
lowering system cost and reducing power dissipation by nearly 50%, the
BCM5421S enables a new class of cost-effective Gigabit Ethernet
equipment.
This device represents the fourth generation of Gigabit Ethernet
transceivers based on the same field-proven architecture as in the
BCM5400, BCM5401, BCM5411, and BCM5402 transceivers. The
fourth generation Gigabit PHY core has already been deployed in the
BCM5404, a quad port 10/100/1000BASE-T device of which the
BCM5421S is a single port slice.
The BCM5421S’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
BCM5421S architecture not only 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 GBICs and uplinks
and, at 1W per port, the BCM5421S dissipates nearly half the power of
previous Gigabit PHY transceivers. In addition, the BCM5421S has
extremely low EMI emissions, which reduces the design constraints
required to meet EMI emissions specifications.
The BCM5421S incorporates a number of advanced features. A link
quality indicator LED gives installers an instant visual indication if there
are any problems with the wiring plant supporting operation at the
desired speed. This includes physical wiring defects that the BCM5421S
cannot automatically correct for 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 BCM5421S is fully compatible with the IEEE
802.3 standard for auto-negotiation of speed, but additionally supports
[email protected] [email protected] allows the BCM5421S
to force auto-negotiation to automatically establish link at speeds that the
channel can reliably support, preventing failure to link due to standard
IEEE auto-negotiation.
In addition to supporting IEEE 802.3 Standard Gigabit Media
Independent Interface (GMII), and industry standard Ten Bit Interface
(TBI), the BCM5421S also supports the RGMII and RTBI, serial
SerDes, and SGMII interfaces. The serial SerDes and SGMII are reduced
pin-count (4 and 6 respectively, versus 25) Switch/MAC interfaces. In
addition, the serial SerDes interface can be used to route from SerDes to
copper as in GBIC applications. RGMII is a reduced pin-count (12
versus 25) version of the GMII and RTBI is a reduced pin-count version
of TBI, utilizing standard ASIC technology. The high-density package,
multiple MAC interfaces, and streamlined power supply lowers system
cost and simplifies the system and board level design.
The BCM5421S also has ESD tolerance well above typical industry
standards. This prevents ESD damage not only during manufacturing but
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 recent cable installations.
Broadcom®, the pulse logo, [email protected], and Connecting everything® are trademarks of
Broadcom Corporation and/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.
5421S-PB00-R
07/09/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: [email protected]
Web: www.broadcom.com