BCM5488R
®
OCTAL-PORT 10/100/1000BASE-T GIGABIT ETHERNET TRANSCEIVER
SUMMARY OF BENEFITS
FEATURES
• Eight fully-integrated 10BASE-T/100BASE-TX/1000BASE-T
• Low-power, octal-port integration enables single-row, high-port
Gigabit Ethernet transceivers
density switches.
• Lowers system costs by eliminating PCB layers required for
routing high-density solutions.
• Reduced I/O pin requirements with RGMII (over 50%).
• Clock timing can be adjusted to eliminate board trace delays
required by the RGMII specification.
• Lowers MAC/switch costs by reducing the number of pins
required to interface with the PHY.
• Fully compliant with IEEE 802.3, IEEE 802.3u, and
IEEE 802.3ab standards
• 0.13-micron CMOS—low power and cost
• RGMII HSTL MAC interface
• Supports line-side triple-speed SFP with auto-detect capability
• Provides compatibility with IEEE standard devices operating at
10 Mbps, 100 Mbps, and 1000 Mbps at half-duplex and fullduplex.
• Supports line-side copper or fiber mode
• Supports fiber 100M and 1G operation on the same SerDes pins
• Lowers system BOM cost and simplifies system design.
• Low power
• Eases system-level debug.
• <600 mW per port
• Advanced power management
• Enables use of low-cost magnetics, even in high-density (48+)
designs.
• Trace-matched output impedance
• CableChecker characterizes cable plant condition and
• Line-side loopback
immediately indicates cabling issues.
• Prevents erroneous equipment return due to bad cable plants.
• Prevents manufacturing fallout due to bad cable plants.
• Low EMI emissions
• CableChecker™ diagnostics
• CableChecker detection of cable plant impairments
• Link quality indication LED
• Automatic detection and correction of wiring pair swaps, pair
skew, and pair polarity
• Automatic MDI/MDIX crossover at all speeds
• Over 3 kV of CESD tolerance prevents equipment damage and
return.
• Operates with larger packets for wider range of packet protocol
support and improved efficiency.
• Robust cable-sourced electrostatic discharge (CESD) tolerance
• Ease of manufacturing with JTAG support and simplified power
• Support for jumbo packets up to 10 KB
• Ethernet@WireSpeed™.
supply.
• IEEE 1149.1 (JTAG) and 1149.6 (AC-JTAG) boundary scan
• Package: 676-pin PBGA
BCM5488R System Diagram
Optical Modules
100FX/1G optical or triple
speed copper SFP
10/100/1000
Mbps
Ethernet
Switch
BCM5488R
10/100/1000BASE-T
Gigabit Ethernet
Transceiver
2x8
RJ-45s
with
Integrated
Magnetics
BCM5488R
10/100/1000BASE-T
Gigabit Ethernet
Transceiver
OVERVIEW
BCM5488R
TX DAC
TXD [3:0]{8:1}
GTXCLK {8:1}
TRD [3:0] {8}±
TRD [3:0] {7}±
TRD [3:0] {6}±
TRD [3:0] {5}±
XTALK
Canceller
Baseline
Wander
Correction
RGMII
Interface
TX_EN {8:1}
RXD [3:0]{8:1}
RXC {8:1}
TRD [3:0] {4}±
RX_DV {8:1}
Echo
Canceller
TRD [3:0] {3}±
TRD [3:0] {2}±
DFE/
Trellis
Decoder
TRD [3:0] {1}±
FFE
PGA
ADC
LED
Interface
Timing &
Phase
Recovery
SGIN {8:1}±
SerDes
SGMII-Slave
RGMII
I/F
MII
MGMT
Control
MII
Registers
MDIO [2:1]
MDC [2:1]
REGSUP [2:1]
REGCNTL [2:1]
SLED_STRB
SLED_IN
AutoNegotiation
SGOUT {8:1}±
LED[4:1] {8:1}/
SLED[32:1]
SLED_CLK
Modes
Voltage
Regulator
Clock
Generator
REGSEN [2:1]
Bias
Generator
REFCLK2+
REFCLK1+
RDAC [2:1]
BCM5488R Reference Design
The BCM5488R consists of eight complete 10/100/1000BASE-T Gigabit
Ethernet transceivers integrated on a single monolithic CMOS chip. The
BCM5488R is optimized for low power and small footprint size to enable
high-port density applications. By lowering system cost and reducing
power dissipation by nearly 30 percent, the BCM5488R enables a new
class of cost-effective Gigabit Ethernet equipment, driving the delivery of
Gigabit Ethernet bandwidth to the desktop.
This device is another member of Broadcom’s 0.13-µm Gigabit Ethernet
copper PHY family, joining more than a dozen other quad and single
products. The 0.13-µm process is the optimal process that offers the best
performance, lowest cost, and lowest power for Gigabit Ethernet copper
solutions. Devices based on the 0.13-µm process offer an excellent longterm cost curve, enabling better cost reduction over time (compared to
older technologies) without having to redesign or requalify a new part.
The BCM5488R DSP-based architecture and advanced power
management techniques combine to achieve robust and low-power
operation over existing Category 5 twisted-pair wiring. The BCM5488R
architecture not only meets the requirements of IEEE 802.3, IEEE 802.3u,
and IEEE 802.3ab but also maintains the industry’s highest level of margin
over IEEE requirements for echo, near-end crosstalk (NEXT), and far-end
crosstalk (FEXT). Low power is the key to implementing high-density
Gigabit Ethernet switches, and the BCM5488R has the lowest power in the
industry at less than 600 mW per port. In addition, the BCM5488R has
extremely low EMI emissions, which reduces the design constraints
required to meet EMI radiation specifications.
Each BCM5488R port is fully independent and has individual interface,
control, and status registers, and 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 preferred speed. This includes physical wiring defects that
the BCM5488R cannot automatically correct for and channel conditions
such as excessive cable length and return loss, crosstalk, echo, and noise.
Broadcom’s CableChecker software can be used with the device to
provide remote management of the cable and a first level of diagnostics
and fault isolation.
The BCM5488R supports the RGMII MAC interface. The RGMII
interface is a reduced pin-count (12 versus 25) version of the GMII. The
RGMII clock timing can be adjusted to eliminate the board trace delays
required by the RGMII specification. The reduced pin-count interface
simplifies design and lowers system cost by reducing the number of layers
required to route high-density solutions. In addition, this interface allows
fewer pins at the MAC/switch, which reduces the MAC/switch cost by
enabling smaller die sizes than would be possible with full GMII.
The BCM5488R has the industry's highest tolerance to electrostatic
discharge (ESD). This prevents ESD damage not only during
manufacturing but also during CESD events in the field. CESD is an ESD
event that occurs when an electrically charged network cable is plugged
into a network port. This is an issue that has become more prevalent with
contemporary cable installations, and the BCM5488R can tolerate well
over 3 kV of CESD.
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.
5488R-PB02-R
07/26/06
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: [email protected]
Web: www.broadcom.com